I'm truly humbled to see everyone's support for this build! I've just recently released all the CAD files I used to create the intake manifold for free on my site, linked below. Be sure to grab a shirt on merch.blackthumb.tv/ if you'd like to support my efforts! wiki.blackthumb.tv/wiki/Legacy/Supercharger.md
So, supercharged flat 6 in a Legacy? HELL YES! Sounds freaking amazing and the fact that it is that quick without an after cooler is awesome and means you really do not need any extra boost on the current setup.
@@TheStruggleFestmeth water is fun. Unless your car gets struck with lightening the pump shorts out, pumping 7gal of meth and water into your engine overnight…
The later M90 superchargers off the 04-07 GTP came with a drive-by-wire throttle body. Not sure the throttle flange would match that Gen 3 blower, but the 04-07 blower (gen 5 m90) are more efficient. Also, there is a tool out there to machine the snout down to run a smaller pulley, and all you need is a drill. As someone who has messed with a lot of GTPs, that blower sounds like its spinning about the stock speed for a 3800, so you can definitely go down a couple sizes on the pulley. The 3.6 is going to be way more efficient at moving air through than the 3800 could ever dream of being lol. Awesome build! Thanks for the inspiration.
Thanks for the info! I had also considered driving the blower off a custom pulley on the alternator to fix the issue, but I'm trying to contain myself as I don't think this engine can handle much more (given what I've seen from the turbo guys). The drill-tool sounds quite interesting though, I'll have to keep that in mind just in case.
@@BlackthumbTV I was in the 3800 groups for a long while many years ago and that guy's not lying. The pulley was one of the main upgrades for the m90 supercharger. They can make way more power with just a pulley.
This is epic. mad love for the ez30. some solid engine and transmission mounts would definitely increase the driving experience. After installing Kien mounts in my 04 6 spd ez30 legacy, the throttle response was so much crisper and the engine noise inside the car increased massively. highly recommended for maximum auditory enjoyment.
@taylorhickman84 3.0 ez30 is a lot more reliable at similar power levels (240hp) than the ej. But not so much when boosted. The 3.6 is weaker than the 3.0
As a Subaru guy and love your content. This is the kind of car shenanigans. My 1st swap was a JDM EJ207 in to a US Sti. Doesnt sound special but back in 2009 it was rare because of the US spec STi was a completely different ECU, sensors and wiring. I had to solve all these things myself, no guides, no kits. Nothing against the bolt-on guys, I just need more of a challenge. Im blessed with the ability and knowledge to completely assemble, install, manufacture small things, wire and tune. This channel is gold to me. Thank you Blackthumb.
I like it. You need to max out the stiffness on your mounts and soften up your suspension. You working with a split block so you need to watch an sti buck under boost. Try and hit that mark. It's something you can fabricate for a cheep awesome and effective solution. Have a blast.
You’re content is so entertaining dude, you do such a good job showing your process. I’ve been wanting a classic jdm car that I can mess around w and learn how to do all this stuff. I wanna do all of this you’re doing but I’m on such a small budget and very little knowledge so you help a lot
There is alot of space to fill with boost. It would have taken longer but separating the big pancake manifold into individual runners would have helped power and response drastically.
It doesn't make as big of a difference as you'd think. I tuned a Miata with an intercooled supercharger kit, where the intercooler was after the supercharger/throttle body, meaning it would see both boost and vacuum. It did make a difference in both time to build boost and time to build vacuum, but nowhere near as much as I had anticipated. This setup builds boost as fast as you can open the throttle effectively, and change to Decel/vacuum delay isn't noticeable vs the stock manifold.
The best parts of a supercharger are the increased power, whine, and it leaves the exhaust unobstructed for the glorious H6 sound. That is a hilarious, awesome and unique build; nice job man!
TH-cam algorithm is a funny thing, I’ve been researching 3800 swaps and this video popped up, much to my surprise it’s fantastic, thanks for all the info brother and enjoyed this style of video. I’ll be watching more of your stuff from now on. PS: that H6 sounds fantastic with that blower 🤔
The fun part about just slapping it together with improvisation, is the chance to make it even better! Slowly work better and more proper parts into the project and really fine tune the performance. This is really cool! I love to see how people can just find a junkyard super charger and slap it onto an engine, never designed or intended for one.
Hey man! Just found you in my recommandations and i love it!😅 That is what car tuning culture is all about and not another guy who rebuilds a supercar (nothing wrong with that but to much here allready). Knowledge, Skill and knowing what you talk about, i am impressed! Keep it coming bud! Greets from germany❤
my dads got a 2001 Silverado 1500 with a 4.3 v6. He got it with around 20k miles, and today its sitting around 335k miles. Hes retiring this year, and ive always wanted to take one of these old 3800 superchargers and throw it on an old TBI 4.3. This video greatly inspires me to get his old ass out in the garage and try it!
1st time seeing your content mate, and I have recently found a new love for Subaru's after pulling one apart....I work in a wrecking yard. They are so user friendly so I knew your video should be good. And it was awesome! You are definately a car guy! Not too sure about the LS swapped 8 you mentioned though, I had one of them and loved it for what it was. Looking forward to catching up on your content here in Sydney, Australia. ✊🏻
Adding extra dampening to the engine using stabilizing struts should help minimize the lurch during shifting. I think this will help it be even faster.
That was such the best car video I've seen all year! I loved everything right from the get go: your confidence, comical anecdotes, your editing skills, your knowledge, that you were happy to share what you did, and you delivered your speech in a clear and concise way that was very easy and enjoyable to understand. Subbed. Greetings from Australia 🦘
Wow, what a great video! First off, i love the unusual project. I also love how explain clearly how you actually accomplished it, and you're right, you are hilarious! I'll have to check out some more of your content. One quick question, what kind of tuning did you have to do to get it to run with that boost, if any?
Any vehicle will need a tune when you modify it, especially when adding forced induction. Check out my video on ECU tuning for more info on why. All my setups run standalone ECUs for what it's worth, I don't typically run factory engine management.
Really wish there was someone like you that had a video up on supercharging the 2.8L 24V VR6 with a twin screw. Super in depth and also concise. With good explanation and plenty of video showing how. Lovely. Deffo subbed.
Thing sounds Awesome! Glad to see that smaller pulley did the trick ! That boost level should be good for 50% more power than stock, minus 40ish hp for the belt load. Looks like a blast to drive. Congratulations on making dirt cheap daily look bad haha
I can't wait to see what's next as this channel explodes. One thing: don't change the spirit of your videos as you get big! I love how you do everything: garage fab style with some new-tech productions like 3D printing, weird engine swaps and odd/novel build ideas using randomly chosen junkyard bits, and your humor/personality. Great job, I'm along for this ride onwards and upwards - subscribed!
Not sure how big this will ever get, I'm honestly surprised that this video got the attention it did. Didn't know so many people liked supercharged Subarus. I'll be interested to see where things go from here. I only plan to keep doing things like this, and if I had more resources from this channel I'd probably keep doing the same thing, just with more parallel projects. Time will tell 🙂
Would love to see a scoop fitted over the super charger, to both cover and funnel air to cool everything , would be pretty neat Sick build! Love to see people modifying cars that people usually dont , makes you a pioneer 😊
I had a 98’ 2.5RS from 98 to 2003ish. I used to roll with another 2.5RS guy every now and then that had positive displacement supercharger on his. It was pretty fun. It had fun throttle response turning corners with the awd that I never felt with a turbo. I always wanted to drive one of the supercharged S4’s but never found the chance.
Dude this thing is SICK, I love what you've done to it. My buddy's mom drove one of these legacies (stock) for about 18 years before it died and its really something seeing what it could have been. You got any more plans for the Gc8? I own a stock 97 wrx so I'm a sucker for Gc8 content and have to ask.
Dude I am only 5min in and I have to comment on how much I'm diggin your wit. I dont usually watch videos like this all the way through but your easy to listen to and entertaining. Cheers sir and keep up the work! You've made this actually mad complicated thing seem obtainable to regular people like myself!
Man!! I love that inspirational dreamers like yourself exist. As a DIY Subi enthusiast with some questionable welding skills myself, I am always deterred by the naysayers; family, mechanic shops, Facebook Groups...lol! Honestly, I know I'm not the only one that feels that they can create some really awesome stuff through their imagination but is quickly squashed by naysayers. From the bottom of my heart, I thank you for not listening to the naysayers and truly built what you can believe in your head. Simply put I am blown away by your imagination brought to reality. You truly have made be believe that I can create what my mind thinks up...within reason, of course!! Cheers!! 🤩
This sounds really fun. I have a supercharged f150 and it’s addictive. Sounds like this is 300-350whp and equal amounts of torque. Torque is a beautiful thing.
Turbo lag makes me pull my hair out when driving a WRX. Thanks for making this video, I've been wondering what a supercharged (Roots/Screw) Subaru might look like, you did a great job. I wonder if an LS swapped awd Subaru is possible
LS swapping is possible, but with the subaru trans it'd hang way out the front of the grille. I remember seeing one a bit ago, it didn't even have much of a front end left. Just engine
The Ferrari V8 Subaru rally car is an example. The engine sticks out of the front axle like an Audi, to a lesser extent. A front mounted heat exchanger in this setup will be tricky, because the engine will be colliding with it, which is physically illegal.
@@RRR_Motorsports I’d wonder the same thing unless it has a stock STI turbo as mine does and it lags but once it kicks in it’s way more fun for a cheap upgrade.
As an Aussie, I must inform you that you may not call it a super roo as that marque is already taken by an Australian Muscle classic icon. The Ford Australia Falcon Super Roo. Love this build though, great work and great video!
Boxers are by Design more "torquey" than an = Inline 4 Cylinder. (no balancing shaft, no counterweights, not having to fight gravity) And Turbo/Boosted Boxers even more so, Also able to put that power down due to AWD.
I need this in my life. Also wondering what you used for tuning? I see something on the passenger side floor. My guess is a thinggymabob, motec flux capacitor, epa tears or fuel teck? I'd totally do this build myself and daily it!!
Theoretically, if you know what DPI the images were scanned at, you know that X number of pixels is one inch. This information usually gets embedded into the images automatically, meaning you shouldn't need to scan the ruler. I was under the impression that most CAD software would scale the image automarically, but I'm not sure if that's true or not.
I'm a b pressure alloy tig welder and a cab structural welder and I also work on the heaviest mining equipment in the world. Oh yeah also a mechanic, all trained and applied with experience. YOUR WELDS LOOK FINE!!! I am inspired by you and we all appreciate the videos.
This video is outrageously funny! I've never seen your channel before, but I look forward to seeing more of you in the future; you've earned a subscriber. Great job and keep up the stellar production!
That was very well done, I like it! You forgot to mention that it couldn't have happened without the super cool high-tech AC aluminum TIG welder! I have a couple of those superchargers laying around but I never did anything with them yet because I don't have the super Hi-Tech AC aluminum TIG welder
There's a number of key tools that got me through this. The standalone ECU, the welder, the injector flow tester... But the welder was the most recent acquisition and I got it in hopes to do this project!
I ran an Eaton supercharger @ 14 psi peak boost. When i wanted more, and had already pulley swapped, and since im not "crafty", i opted for a 100 shot (dry) of nitrous oxide activated at w.o.t. as we know, superchargers make heat, heat removes horsepowers, nitrous is a bit chilly, the cooler air charge makes all those extra horsepowers and torques
That is a fantastic build! It looks like it would be very difficult to use intercoolers for the boosted air as there is very little space. Would you be tempted to fit a water or water/methanol injection system to the manifold? The kits are quite cheap but I've seen a few guys build their own too.
I had considered intercooling, but Richard Holdener did a video about the ZZP Intercooler and, while it did drop intake temps substantially, it didn't net very much power at all. Not to mention this isn't very much boost thus heat shouldn't be a big issue. Water/methanol injection shouldn't be necessary at these boost levels, especially considering it's already running on E85. Thanks for your comment!
Thank you for the reply! I've just subscribed to your channel. You have done some fantastic builds. This Subaru build is great. My favourite part of the build is the supercharger coming up out of the hood. I love seeing it in action.
this is awesome! i really want to throw an m90 on my k24a1, and this video inspired me to do more research. I have a bunch of k series manifolds lying around. the cricut make gaskets were genius! the decapped injectors are just like how a honda boy would do it on an old D series! This build has my respect. I favor this over some rich kids wrapped Q50 or a clapped out stanced lexus with an automatic trans.
In central PA. If only there was another sloppy car guy around here to show my cool supercharged Legacy to... PS I believe I first discovered injector decapping from one of your videos way back, now that I think about it. Thanks for that! If I do a video on it you'll be getting shouted out for sure!
@@BlackthumbTV im in north east pa, just looking where you were driving looked like Pennsylvania lol. my friend owns area1320 and has a AWD mustang dyno local to me if you are ever interested, there are some shops near you also that are good, i would have to ask my central PA friends to remember them correctly
@@SloppyMechanics Actually, this might just work out. I've been talking to my buddy with an AWD dyno, however it's torn down for upgrades for the next few months. Maybe I head up your way for a dyno with this build?
My man! This just popped up at the perfect time. I am just now starting my ez30 swap on my 2 door gc. The plan is to supercharge it with an s4 blower. You are a huge inspiration!
LOL that super trying to rip the motor off the mounts is hilarious!! i've never seen one with the pully so far out from the engine! now you have to go twin charged of course so you get the low AND high RPM boost. don't stop until the rods are sailing out sideways lol
One other thing you could do to increase, not necessarily boost, but how fast it comes on, would be to reduce the volume of that intake plenum. That's a lot of air volume for that little supercharger to compress. If you could reduce the plenum volume by 50% I bet you'd see a large benefit in boost response.
Out of curiosity I just checked a datalog, and I go from vacuum to full boost as fast as I can push the pedal down between shifts (less than a second). It actually comes on so fast that I grenaded second gear, so I gotta be careful with it!
i worked in a subaru workshop and one of the on the cheap things we did was add an engine chain too stop a bunch of that tq movement go from the front of the block too the fraim rail on the drivers side (amature rally cars in australia) helps when youve just got stock mounts
I've been searching for this type of thing for ages! Thanks TH-cam recommended! I'd honestly likely buy this as a kit if you improved it and sold it, keep up the good work, subscribed! 🔥
I remember years ago I was searching to see if someone had supercharged a Subaru but there just wasn't anything. After some time I finally had the skills necessary to do it myself! Also, the design files are available on my site for free. You're welcome to use them to fab one!
Me coming from the supercharged gm 3800 world your build as great but it is leaves a lot of the table. The inlet side of the stock casting blower is VERY restrictive and can be easily ported for more flow. The top plate of your new intake should be cut out to join the square outlet hole to the bypass valve hole easley done with a jig saw. Then machine the "bar" off of the bottom of the blower that allows more air flow. The outlet of the blower can easily be extended forward towards the pulley for more outlet flow on the blower itself. My "gtp" (actually was a bonneville SSEi) made 300whp on a stingy mustang dyno vs the factory rated 240 crank on less then stock boost.
Was going to ask if you’d be willing to share any of the documents you’d made to do this, then checked description and went to your site and discovered you already had… I’ve toyed with the idea of a blower for my 2002 h6 outback for a while. Mine is on Baja springs, and a 2” front 2.5” rear body lift, 29” km3s, custom pipe bumpers, dual range manual swapped. It’s amazing how good off road these cars can be. I get some great looks out on rzr and Jeep trails already, the blower would be helpful with my limited low range to get some more grunt, and it would make the car much happier toting around heavy tires and camping gear. I’ll be sure to pick up some merch, gotta support people like you who go out of your way to help others do cool stuff!
Glad I could help! That sounds like a sweet build, I'm sure having a blower would certainly turn some heads. Thanks for your support, and best of luck on your project!
me and my boys are planning to do a build similar to this with the same engine but in a 2001 subaru outback h6, we also found aftermarket sites that have built forged internals and what not for the EZ30R engine. it will be a glorious build.
sounds insane, amazing build and insanly smart to make this all work. ive never seen your videos but gonna follow now, im guessin gits not making a ton of power yet, and def upgrade the motor mounts, its will actually help with power loss to the wheels. (sounds stupid but its true) more of a butt dyno power loss
For all the turbo fanboys out there: you're right. Turbos are more efficient and generally better for mid and high range power. BUT! A proper roots or twin screw blower setup will provide electric-car-like low end torque and works instantly. They love being short shifted and just "feel" the strongest. Also the sound oh lord the WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE is intoxicating. More so than aggressive turbo spin and blow off valves. I've had NA, single turbo, twin turbo, centrifugal, and roots type cars and the roots/screw blowers are the most fun to drive; the second being the twin turbskis. Thanks for coming to my ted talk
I had actually planned to say something like "this build reminds me of driving a Tesla" but I know how the car community feels about EVs didn't feel like being burned at the stake. And too many people are just focused on getting the biggest horsepower number. Which is also fun, but this is fun too. Turns out, you're actually allowed to like multiple things 🤷
You whipped this together already?!?! wtf lol - quick edit as you talked about the 5speed later on - the stock h6 can destroy the 5speed and I went through 3 5speeds before upgrading to the 6speed. Happy to help ya with the details on that swap. This was amazin nice work
When I posted the CAD photo of the intake manifold, it was already running and driving 😉. I don't tease projects unless I know they're gonna be something I can show you guys. Seems dishonest otherwise. I've done a number of 6 speed swaps, the thing I need help with is the price, because those things are damn expensive! Even spec B trans are crazy...
@@BlackthumbTV - I did make my own axles using subie daves kit which wasn't terrible but you are right 1500 starting out!! They do make some 5speed braces to help but im unsure if they are snake oil or real🤷♂ I ran them and my 5speed survived an entire day at the track with traps around 124mph so maybe they did their job. I love this btw and your wiki documents everything which is incredibly useful for any other people that wants to recreate this.
@@al73r thanks for your kind words, glad someone is getting good use out of the wiki. I wrote the entire wiki software/site from scratch, so time well spent I suppose!
@@BlackthumbTV - i was curious to what you used. I use mediawiki as I wanted to keep it searchable and have categories for organization. It does a lot of the leg work for you vs coding everything. Yours is very tastefully done and is snappy on loading. When you gonna post all the drawings and cad files for that supercharger mount ?? :D
@@al73r Yep, whipped the software up one evening. It solely uses Github as a backend, so technically anyone can edit it. Files are just simple Markdown files. Was more of a test to see what I could get away with without paying for any backend services lol. The answer is: quite a lot. A part of me says I should offer them up for sale, but another says they're not even worth money heh. I'll look into it.
I used to get 12 psi in my super coupe which was the same super charger. It's gotta be your manifold. You gotta make a funnel with direct tubing. No bladder to fill
Your super coupe had a substantially bigger crank pulley (~7") than the one on this Subaru engine (~5.5"), thus your supercharger was spinning faster than this one in stock form. Also, the size of the manifold does not correlate to peak boost pressure, only how long it takes to build said pressure, which is currently as fast as I can stab the throttle according to ECU datalogs. (Engine volumetric efficiency) vs (blower displacement * RPM) is what determines peak pressure, from what I understand.
how much force does the blower belt need to not slip? I feel the manifold could be made out of much thinner sheet if internal ribbing was involved...also integral charge cooling might be possible ;-)
The thicker material was mainly to give me something to tap threads and bolt to, and yes to be 100% sure there'd be no issues with the load of the supercharger and belt. Check out the FAQ on my site for more info on cooling, but the short version is this build doesn't need it at these power levels, especially considering it runs on E85
My wrx pulls about the same so not bad. Like you said those 6 cylinders weren't exactly made for power. I think the subaru transmission(s) downfalls stem from subaru trying to keep the cars lightweight and the whole "symmetrical AWD" thing would surely be affected by a heavy transmission up front. Sure a transmission doesn't weigh as much as a motor or the whole car itself but its a source of extra weight in their case. Plus the only car they thought was a performer has made its name, though the SVX is another sleek car that had potential
Is there anyway to do more equal length headers on these to make potentially make a closer sound to a Porsche? My buddy had a SVX motor in his legacy it had a 911 rasp to it.
oh my god my mind got WAY too blown at "scan a ruler" and I immediately flashed to like 5 past projects where that would have saved a LOT of tinkering.
i love it, minus the engine mounts lol so for all my custom with a k builds, get ya a set of late 90's early 00's gm torque mounts for a 3100-3800 series engine car (transverse mount) they'll mount to just about anywhere you can weld two 3/16th plates to, and 2 bolts per mount, keeps the engine from rocking back or throwing itself forward on every shift :) love the build again, not being a keyboard warrior
Would love to see how you tuned this thing! Knowing turbo Subarus and Subarus in general, I’m curious how it was tuned to accept the supercharger boost (also love the sound of H6s, miss my Tribeca). That thing needs some raptor headers!
Honestly, the secret in my builds usually comes down to two things: Run E85, and temper your expectations. E85 is practically race fuel with that high octane rating it has. I've never had any det on my builds, mostly because my builds are "low power" (IE 500hp or less). I also temper my expectations, meaning I don't push things too far. And if I do, I'm already comfortable with the fact that I'll probably blow it up.
That's genius. The only thing that you could do is have trumpet shaped intake runners so that the trumpet opened flush with base of the inlet. Sometimes they fit a throttle before and after the blower to equalise pressure in blower during idle/ closed throttle as some blowers blow seals. ITBs and pre blower throttle? Maybe have 2 speeds for blower if you really want to show off!❤
![THE SKID FACTORY - Turbo H6 EZ30D Subaru Liberty [Build Review]](http://i.ytimg.com/vi/UhJgvKnuIZg/mqdefault.jpg)
I'm truly humbled to see everyone's support for this build! I've just recently released all the CAD files I used to create the intake manifold for free on my site, linked below. Be sure to grab a shirt on merch.blackthumb.tv/ if you'd like to support my efforts!
wiki.blackthumb.tv/wiki/Legacy/Supercharger.md
Legend
Imma pick up a "This blows" shirt FOR SURE
in the future use sheet steel its very easy to weld and to bend and to work with
This is austrailan😃
subaru? no no
subarcharge? AwYeah!
Your builds ground me as an idealistic car enthusiast. Like usual, thank you for taking the time to show us
Thank you for your kind words, I hope to continue to live up to these standards
@@BlackthumbTV you could fit two superchargers on that intake manifold
So, supercharged flat 6 in a Legacy? HELL YES! Sounds freaking amazing and the fact that it is that quick without an after cooler is awesome and means you really do not need any extra boost on the current setup.
just run water injection and let her eat.
@@TheStruggleFestmeth water is fun. Unless your car gets struck with lightening the pump shorts out, pumping 7gal of meth and water into your engine overnight…
@willham1427 hahaha
That intake box design is perfect for integrating a cooler later too!
@@kw2519 Mate, that sounds like personal experience haha
As a big 3800 guy, I know and love that sound very very much! Sick build.
those park avenue ultras!!
The later M90 superchargers off the 04-07 GTP came with a drive-by-wire throttle body. Not sure the throttle flange would match that Gen 3 blower, but the 04-07 blower (gen 5 m90) are more efficient. Also, there is a tool out there to machine the snout down to run a smaller pulley, and all you need is a drill. As someone who has messed with a lot of GTPs, that blower sounds like its spinning about the stock speed for a 3800, so you can definitely go down a couple sizes on the pulley. The 3.6 is going to be way more efficient at moving air through than the 3800 could ever dream of being lol. Awesome build! Thanks for the inspiration.
Thanks for the info! I had also considered driving the blower off a custom pulley on the alternator to fix the issue, but I'm trying to contain myself as I don't think this engine can handle much more (given what I've seen from the turbo guys). The drill-tool sounds quite interesting though, I'll have to keep that in mind just in case.
5speed gonna break before the motor would be my bet in this situation 😄
This guys not lying smaller pulleys on these are crazy!
@@BlackthumbTV I was in the 3800 groups for a long while many years ago and that guy's not lying. The pulley was one of the main upgrades for the m90 supercharger. They can make way more power with just a pulley.
Awesome video, I think this may be the very 1st supercharged Subaru engine that I've seen.
This is epic. mad love for the ez30. some solid engine and transmission mounts would definitely increase the driving experience. After installing Kien mounts in my 04 6 spd ez30 legacy, the throttle response was so much crisper and the engine noise inside the car increased massively. highly recommended for maximum auditory enjoyment.
yeah that motor movement looked a bit extreme. how does the 3.6 compare in terms of reliability to the 4cyl?
@taylorhickman84 3.0 ez30 is a lot more reliable at similar power levels (240hp) than the ej. But not so much when boosted. The 3.6 is weaker than the 3.0
He does need better engine and box mounts according to the hood camera
😁🍄
People actually do stuff to the EZ30? I’m surprised? At that point get a boxster H6
Port the blower. You'll gain about 1-2 pounds of boost. You can do it at home. Would be a cool video. Thanks!
As a Subaru guy and love your content. This is the kind of car shenanigans. My 1st swap was a JDM EJ207 in to a US Sti. Doesnt sound special but back in 2009 it was rare because of the US spec STi was a completely different ECU, sensors and wiring. I had to solve all these things myself, no guides, no kits.
Nothing against the bolt-on guys, I just need more of a challenge. Im blessed with the ability and knowledge to completely assemble, install, manufacture small things, wire and tune. This channel is gold to me. Thank you Blackthumb.
I’d love to learn that shit
For the sake of the hobby
Its never even crossed my mind what a boxer would sound like with a supercharger before, but now im in love and i want one lol
It sounds amazing
all you can hear is the supercharger.
I'm so glad I stumbled across this video. I absolutely love oddball, homemade, DIY builds like this. I bet that thing is a lot of fun.
I like it. You need to max out the stiffness on your mounts and soften up your suspension. You working with a split block so you need to watch an sti buck under boost. Try and hit that mark. It's something you can fabricate for a cheep awesome and effective solution.
Have a blast.
You’re content is so entertaining dude, you do such a good job showing your process. I’ve been wanting a classic jdm car that I can mess around w and learn how to do all this stuff. I wanna do all of this you’re doing but I’m on such a small budget and very little knowledge so you help a lot
There is alot of space to fill with boost. It would have taken longer but separating the big pancake manifold into individual runners would have helped power and response drastically.
It doesn't make as big of a difference as you'd think. I tuned a Miata with an intercooled supercharger kit, where the intercooler was after the supercharger/throttle body, meaning it would see both boost and vacuum. It did make a difference in both time to build boost and time to build vacuum, but nowhere near as much as I had anticipated.
This setup builds boost as fast as you can open the throttle effectively, and change to Decel/vacuum delay isn't noticeable vs the stock manifold.
Would be interesting to see some accelerating numbers before and after 😄
slow before, slow after, lol.
@@TheUrbanBeekeepers Did you mean, slow before and not as slow after? :-)
I'm impressed with $1300 going that fast.
The best parts of a supercharger are the increased power, whine, and it leaves the exhaust unobstructed for the glorious H6 sound. That is a hilarious, awesome and unique build; nice job man!
TH-cam algorithm is a funny thing, I’ve been researching 3800 swaps and this video popped up, much to my surprise it’s fantastic, thanks for all the info brother and enjoyed this style of video. I’ll be watching more of your stuff from now on.
PS: that H6 sounds fantastic with that blower 🤔
The fun part about just slapping it together with improvisation, is the chance to make it even better! Slowly work better and more proper parts into the project and really fine tune the performance. This is really cool! I love to see how people can just find a junkyard super charger and slap it onto an engine, never designed or intended for one.
Hey man! Just found you in my recommandations and i love it!😅
That is what car tuning culture is all about and not another guy who rebuilds a supercar (nothing wrong with that but to much here allready).
Knowledge, Skill and knowing what you talk about, i am impressed! Keep it coming bud! Greets from germany❤
my dads got a 2001 Silverado 1500 with a 4.3 v6. He got it with around 20k miles, and today its sitting around 335k miles. Hes retiring this year, and ive always wanted to take one of these old 3800 superchargers and throw it on an old TBI 4.3. This video greatly inspires me to get his old ass out in the garage and try it!
1st time seeing your content mate, and I have recently found a new love for Subaru's after pulling one apart....I work in a wrecking yard. They are so user friendly so I knew your video should be good. And it was awesome! You are definately a car guy! Not too sure about the LS swapped 8 you mentioned though, I had one of them and loved it for what it was.
Looking forward to catching up on your content here in Sydney, Australia. ✊🏻
Great build. I love the creative design of the intake and your detailed description of the issues you faced.
Adding extra dampening to the engine using stabilizing struts should help minimize the lurch during shifting. I think this will help it be even faster.
That was such the best car video I've seen all year! I loved everything right from the get go: your confidence, comical anecdotes, your editing skills, your knowledge, that you were happy to share what you did, and you delivered your speech in a clear and concise way that was very easy and enjoyable to understand. Subbed. Greetings from Australia 🦘
Wow, what a great video! First off, i love the unusual project. I also love how explain clearly how you actually accomplished it, and you're right, you are hilarious! I'll have to check out some more of your content. One quick question, what kind of tuning did you have to do to get it to run with that boost, if any?
Any vehicle will need a tune when you modify it, especially when adding forced induction. Check out my video on ECU tuning for more info on why.
All my setups run standalone ECUs for what it's worth, I don't typically run factory engine management.
Really wish there was someone like you that had a video up on supercharging the 2.8L 24V VR6 with a twin screw.
Super in depth and also concise. With good explanation and plenty of video showing how.
Lovely.
Deffo subbed.
Thing sounds Awesome!
Glad to see that smaller pulley did the trick ! That boost level should be good for 50% more power than stock, minus 40ish hp for the belt load. Looks like a blast to drive.
Congratulations on making dirt cheap daily look bad haha
Yep, she rips now! Would be fun to see it at 14psi four that double-ish HP feeling, but I gotta keep myself under control.
I think you would need a gen5 m90 for that, the gen2 on my 2.5l makes 14psi but man does it eat belts !
I like how poorly this comment aged.
I guessed like 230whp based on your comment. Then it goes and nearly doubled that
I can't wait to see what's next as this channel explodes. One thing: don't change the spirit of your videos as you get big! I love how you do everything: garage fab style with some new-tech productions like 3D printing, weird engine swaps and odd/novel build ideas using randomly chosen junkyard bits, and your humor/personality. Great job, I'm along for this ride onwards and upwards - subscribed!
Not sure how big this will ever get, I'm honestly surprised that this video got the attention it did. Didn't know so many people liked supercharged Subarus. I'll be interested to see where things go from here. I only plan to keep doing things like this, and if I had more resources from this channel I'd probably keep doing the same thing, just with more parallel projects.
Time will tell 🙂
This is honestly just so awesome. Love your channel and videos. The enthusiasm you have has to be the best part though.
“You also just scan a ruler” holy shit I’m in tears this is amazing, that’s exactly where i got sold on your channel.
Eager to see what comes next!
Would love to see a scoop fitted over the super charger, to both cover and funnel air to cool everything , would be pretty neat
Sick build! Love to see people modifying cars that people usually dont , makes you a pioneer 😊
I had a 98’ 2.5RS from 98 to 2003ish. I used to roll with another 2.5RS guy every now and then that had positive displacement supercharger on his. It was pretty fun. It had fun throttle response turning corners with the awd that I never felt with a turbo.
I always wanted to drive one of the supercharged S4’s but never found the chance.
Dude this thing is SICK, I love what you've done to it. My buddy's mom drove one of these legacies (stock) for about 18 years before it died and its really something seeing what it could have been. You got any more plans for the Gc8? I own a stock 97 wrx so I'm a sucker for Gc8 content and have to ask.
I may have some stuff going on with the GC8 this winter, but we'll see. I project-hop a lot heh
@@BlackthumbTV I look forward to watching! You should throw a lift on it lol
Dude I am only 5min in and I have to comment on how much I'm diggin your wit. I dont usually watch videos like this all the way through but your easy to listen to and entertaining. Cheers sir and keep up the work! You've made this actually mad complicated thing seem obtainable to regular people like myself!
This is an awesome build!! Engineering your own parts is pretty dang cool and the car sounds AWESOME!!
Man!! I love that inspirational dreamers like yourself exist.
As a DIY Subi enthusiast with some questionable welding skills myself, I am always deterred by the naysayers; family, mechanic shops, Facebook Groups...lol!
Honestly, I know I'm not the only one that feels that they can create some really awesome stuff through their imagination but is quickly squashed by naysayers.
From the bottom of my heart, I thank you for not listening to the naysayers and truly built what you can believe in your head.
Simply put I am blown away by your imagination brought to reality. You truly have made be believe that I can create what my mind thinks up...within reason, of course!!
Cheers!! 🤩
Don't worry about the naysayers. It's your car, do what you want as long as you're safe about it
It's always good to watch cool videos about about cool cars when you're working on your own
This sounds really fun. I have a supercharged f150 and it’s addictive. Sounds like this is 300-350whp and equal amounts of torque. Torque is a beautiful thing.
Turbo lag makes me pull my hair out when driving a WRX. Thanks for making this video, I've been wondering what a supercharged (Roots/Screw) Subaru might look like, you did a great job. I wonder if an LS swapped awd Subaru is possible
LS swapping is possible, but with the subaru trans it'd hang way out the front of the grille. I remember seeing one a bit ago, it didn't even have much of a front end left. Just engine
@@BlackthumbTV Slap a roots supercharger on it and call it a Suba-rhino
The Ferrari V8 Subaru rally car is an example. The engine sticks out of the front axle like an Audi, to a lesser extent. A front mounted heat exchanger in this setup will be tricky, because the engine will be colliding with it, which is physically illegal.
What wrx has turbo lag? Should try driving a big single turbo 1jz 😅
@@RRR_Motorsports I’d wonder the same thing unless it has a stock STI turbo as mine does and it lags but once it kicks in it’s way more fun for a cheap upgrade.
As an Aussie, I must inform you that you may not call it a super roo as that marque is already taken by an Australian Muscle classic icon. The Ford Australia Falcon Super Roo. Love this build though, great work and great video!
Sounds sick . Love the low growl and it looks torquey for a boxer.🤙🏽💪🏽🔥
Boxers are by Design more "torquey" than an = Inline 4 Cylinder. (no balancing shaft, no counterweights, not having to fight gravity)
And Turbo/Boosted Boxers even more so, Also able to put that power down due to AWD.
4:15 you spread the most humble secret of the CAD underworld!
This channel just needs exposure!!! Top notch please keep it up!!! Also maybe replace those motor mounts? Engine looked like it was moving
I need this in my life.
Also wondering what you used for tuning? I see something on the passenger side floor. My guess is a thinggymabob, motec flux capacitor, epa tears or fuel teck? I'd totally do this build myself and daily it!!
That's a Haltech Elite 2500, and I was dailying it until I did the 2nd gear delete. Just finishing up putting the backup five speed in, actually
I have all the fake wood interior panels too, took 6 months of junkyard trips to find them all.
Theoretically, if you know what DPI the images were scanned at, you know that X number of pixels is one inch. This information usually gets embedded into the images automatically, meaning you shouldn't need to scan the ruler. I was under the impression that most CAD software would scale the image automarically, but I'm not sure if that's true or not.
Unfortunately my scanner creates PDFs so I was unable to find the DPI metadata in it. I'd rather scale like this for reliability anyhow
I'm a b pressure alloy tig welder and a cab structural welder and I also work on the heaviest mining equipment in the world. Oh yeah also a mechanic, all trained and applied with experience. YOUR WELDS LOOK FINE!!! I am inspired by you and we all appreciate the videos.
This video is outrageously funny! I've never seen your channel before, but I look forward to seeing more of you in the future; you've earned a subscriber. Great job and keep up the stellar production!
Welcome aboard!
This is growing to be my favorite car channel on youtube. Just a humble guy making insane things. You just gotta love it❤
Love the supercharger on a subaru engine! I looked into it once when I owned my 03 outback but couldn't find any examples of supercharged engines
That was very well done, I like it! You forgot to mention that it couldn't have happened without the super cool high-tech AC aluminum TIG welder! I have a couple of those superchargers laying around but I never did anything with them yet because I don't have the super Hi-Tech AC aluminum TIG welder
There's a number of key tools that got me through this. The standalone ECU, the welder, the injector flow tester... But the welder was the most recent acquisition and I got it in hopes to do this project!
I ran an Eaton supercharger @ 14 psi peak boost. When i wanted more, and had already pulley swapped, and since im not "crafty", i opted for a 100 shot (dry) of nitrous oxide activated at w.o.t. as we know, superchargers make heat, heat removes horsepowers, nitrous is a bit chilly, the cooler air charge makes all those extra horsepowers and torques
I love the way you explain everything, top notch show material. You've earned a sub! :D
That is a fantastic build! It looks like it would be very difficult to use intercoolers for the boosted air as there is very little space. Would you be tempted to fit a water or water/methanol injection system to the manifold? The kits are quite cheap but I've seen a few guys build their own too.
I had considered intercooling, but Richard Holdener did a video about the ZZP Intercooler and, while it did drop intake temps substantially, it didn't net very much power at all. Not to mention this isn't very much boost thus heat shouldn't be a big issue.
Water/methanol injection shouldn't be necessary at these boost levels, especially considering it's already running on E85.
Thanks for your comment!
Thank you for the reply! I've just subscribed to your channel. You have done some fantastic builds. This Subaru build is great. My favourite part of the build is the supercharger coming up out of the hood. I love seeing it in action.
My new favourite small channel car guy. I am so glad the algorithm brought me here. Im here to watch you grow man! Keep it up 🙏
this is awesome! i really want to throw an m90 on my k24a1, and this video inspired me to do more research. I have a bunch of k series manifolds lying around. the cricut make gaskets were genius! the decapped injectors are just like how a honda boy would do it on an old D series! This build has my respect. I favor this over some rich kids wrapped Q50 or a clapped out stanced lexus with an automatic trans.
Big fan of the K series. Check out my videos about my K swapped Impreza!
They make a bunch of supercharger kits for K series. Seems like the centrifugal blowers make more power for that application.
i just found these videos, they are fantastic, you're doing an awesome job!
where are you located?
In central PA. If only there was another sloppy car guy around here to show my cool supercharged Legacy to...
PS I believe I first discovered injector decapping from one of your videos way back, now that I think about it. Thanks for that! If I do a video on it you'll be getting shouted out for sure!
@@BlackthumbTV im in north east pa, just looking where you were driving looked like Pennsylvania lol.
my friend owns area1320 and has a AWD mustang dyno local to me if you are ever interested, there are some shops near you also that are good, i would have to ask my central PA friends to remember them correctly
@@SloppyMechanics Actually, this might just work out. I've been talking to my buddy with an AWD dyno, however it's torn down for upgrades for the next few months. Maybe I head up your way for a dyno with this build?
@@BlackthumbTVif you can make that 2wd we can put it on my dyno
That'd be quite the controversial move ;). Would area1320 be willing to let me rent dyno time and run the car? We could maybe set something up.
I love the way you break it down. You would be an incredible teacher. I enjoyed the video and the build thoroughly. Thank you.
One of the coolest diy builds I have ever seen on TH-cam. Definitely just earned a subscriber
My man! This just popped up at the perfect time. I am just now starting my ez30 swap on my 2 door gc. The plan is to supercharge it with an s4 blower. You are a huge inspiration!
Finally someone who can understand why I love my gtp so much! Veeeeeeeee
This channel deserves wayy more subscribers man keep up the amazing work! Keeping the real car builds alive!
LOL that super trying to rip the motor off the mounts is hilarious!! i've never seen one with the pully so far out from the engine! now you have to go twin charged of course so you get the low AND high RPM boost. don't stop until the rods are sailing out sideways lol
I'm all to familiar with grenading engines, check out the video about the K swapped Subaru
This popped up in my feed today, so glad it did! Awesome build man!
Just discovered your channel through this video, it's awesome dude! Keep it up, you'll get followers in no time
Ill always love the whine of a supercharged vehicle, it never gets old.
@0:21
Just waiting for that sharp sheet metal to dig into that blowers belt 😂
One other thing you could do to increase, not necessarily boost, but how fast it comes on, would be to reduce the volume of that intake plenum. That's a lot of air volume for that little supercharger to compress. If you could reduce the plenum volume by 50% I bet you'd see a large benefit in boost response.
Out of curiosity I just checked a datalog, and I go from vacuum to full boost as fast as I can push the pedal down between shifts (less than a second). It actually comes on so fast that I grenaded second gear, so I gotta be careful with it!
@@BlackthumbTV truly the subaru 5-speed experience
i worked in a subaru workshop and one of the on the cheap things we did was add an engine chain too stop a bunch of that tq movement go from the front of the block too the fraim rail on the drivers side (amature rally cars in australia) helps when youve just got stock mounts
Clever, thanks for the tip!
Oh the best !!!! You scan a ruler !!! That's thinking smart !! Love it !! Looks amazing !
I've been searching for this type of thing for ages! Thanks TH-cam recommended! I'd honestly likely buy this as a kit if you improved it and sold it, keep up the good work, subscribed! 🔥
I remember years ago I was searching to see if someone had supercharged a Subaru but there just wasn't anything. After some time I finally had the skills necessary to do it myself!
Also, the design files are available on my site for free. You're welcome to use them to fab one!
You should put some solid motor mounts on it. Got alotta movement at the moment... solid mounts around the board are just the way to go
Totally rad. Really enjoy watching your process and outstanding commentary.
Me coming from the supercharged gm 3800 world your build as great but it is leaves a lot of the table. The inlet side of the stock casting blower is VERY restrictive and can be easily ported for more flow. The top plate of your new intake should be cut out to join the square outlet hole to the bypass valve hole easley done with a jig saw. Then machine the "bar" off of the bottom of the blower that allows more air flow. The outlet of the blower can easily be extended forward towards the pulley for more outlet flow on the blower itself. My "gtp" (actually was a bonneville SSEi) made 300whp on a stingy mustang dyno vs the factory rated 240 crank on less then stock boost.
Love the sound of it! Nice build!
Awesome build! I clicked on this just cause how unique this project was lol keep up the great work!
Was going to ask if you’d be willing to share any of the documents you’d made to do this, then checked description and went to your site and discovered you already had…
I’ve toyed with the idea of a blower for my 2002 h6 outback for a while.
Mine is on Baja springs, and a 2” front 2.5” rear body lift, 29” km3s, custom pipe bumpers, dual range manual swapped. It’s amazing how good off road these cars can be. I get some great looks out on rzr and Jeep trails already, the blower would be helpful with my limited low range to get some more grunt, and it would make the car much happier toting around heavy tires and camping gear.
I’ll be sure to pick up some merch, gotta support people like you who go out of your way to help others do cool stuff!
Glad I could help! That sounds like a sweet build, I'm sure having a blower would certainly turn some heads.
Thanks for your support, and best of luck on your project!
me and my boys are planning to do a build similar to this with the same engine but in a 2001 subaru outback h6, we also found aftermarket sites that have built forged internals and what not for the EZ30R engine. it will be a glorious build.
sounds insane, amazing build and insanly smart to make this all work. ive never seen your videos but gonna follow now, im guessin gits not making a ton of power yet, and def upgrade the motor mounts, its will actually help with power loss to the wheels. (sounds stupid but its true) more of a butt dyno power loss
For all the turbo fanboys out there: you're right. Turbos are more efficient and generally better for mid and high range power. BUT! A proper roots or twin screw blower setup will provide electric-car-like low end torque and works instantly. They love being short shifted and just "feel" the strongest. Also the sound oh lord the WEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE is intoxicating. More so than aggressive turbo spin and blow off valves. I've had NA, single turbo, twin turbo, centrifugal, and roots type cars and the roots/screw blowers are the most fun to drive; the second being the twin turbskis. Thanks for coming to my ted talk
I had actually planned to say something like "this build reminds me of driving a Tesla" but I know how the car community feels about EVs didn't feel like being burned at the stake.
And too many people are just focused on getting the biggest horsepower number. Which is also fun, but this is fun too. Turns out, you're actually allowed to like multiple things 🤷
You whipped this together already?!?! wtf lol - quick edit as you talked about the 5speed later on - the stock h6 can destroy the 5speed and I went through 3 5speeds before upgrading to the 6speed. Happy to help ya with the details on that swap. This was amazin nice work
When I posted the CAD photo of the intake manifold, it was already running and driving 😉. I don't tease projects unless I know they're gonna be something I can show you guys. Seems dishonest otherwise.
I've done a number of 6 speed swaps, the thing I need help with is the price, because those things are damn expensive! Even spec B trans are crazy...
@@BlackthumbTV - I did make my own axles using subie daves kit which wasn't terrible but you are right 1500 starting out!! They do make some 5speed braces to help but im unsure if they are snake oil or real🤷♂ I ran them and my 5speed survived an entire day at the track with traps around 124mph so maybe they did their job. I love this btw and your wiki documents everything which is incredibly useful for any other people that wants to recreate this.
@@al73r thanks for your kind words, glad someone is getting good use out of the wiki. I wrote the entire wiki software/site from scratch, so time well spent I suppose!
@@BlackthumbTV - i was curious to what you used. I use mediawiki as I wanted to keep it searchable and have categories for organization. It does a lot of the leg work for you vs coding everything. Yours is very tastefully done and is snappy on loading. When you gonna post all the drawings and cad files for that supercharger mount ?? :D
@@al73r Yep, whipped the software up one evening. It solely uses Github as a backend, so technically anyone can edit it. Files are just simple Markdown files. Was more of a test to see what I could get away with without paying for any backend services lol. The answer is: quite a lot.
A part of me says I should offer them up for sale, but another says they're not even worth money heh. I'll look into it.
i love theway this thing lifts the suspension when u get into it ...awsome build def erans you a new subscriber!
Damn dude this is sick! Awesome job! I'm suprised you don't have millions of subs, keep it up
Man, such awesome work and creativity. Congratulations! I really enjoy the content of your videos. Keep up the great work!
Just found this channel love the builds! How have you not blown up yet!?!?!
First time seeing your content. You’re awesome!!! Such a great video. I LOVE the shadetree, yet techsaavy way you went about the build. 👍🏻
I used to get 12 psi in my super coupe which was the same super charger. It's gotta be your manifold. You gotta make a funnel with direct tubing. No bladder to fill
Your super coupe had a substantially bigger crank pulley (~7") than the one on this Subaru engine (~5.5"), thus your supercharger was spinning faster than this one in stock form.
Also, the size of the manifold does not correlate to peak boost pressure, only how long it takes to build said pressure, which is currently as fast as I can stab the throttle according to ECU datalogs.
(Engine volumetric efficiency) vs (blower displacement * RPM) is what determines peak pressure, from what I understand.
how much force does the blower belt need to not slip? I feel the manifold could be made out of much thinner sheet if internal ribbing was involved...also integral charge cooling might be possible ;-)
The thicker material was mainly to give me something to tap threads and bolt to, and yes to be 100% sure there'd be no issues with the load of the supercharger and belt. Check out the FAQ on my site for more info on cooling, but the short version is this build doesn't need it at these power levels, especially considering it runs on E85
My wrx pulls about the same so not bad. Like you said those 6 cylinders weren't exactly made for power. I think the subaru transmission(s) downfalls stem from subaru trying to keep the cars lightweight and the whole "symmetrical AWD" thing would surely be affected by a heavy transmission up front. Sure a transmission doesn't weigh as much as a motor or the whole car itself but its a source of extra weight in their case. Plus the only car they thought was a performer has made its name, though the SVX is another sleek car that had potential
The five speeds issue is it's split-case design, hence is why the six speeds are known to handle 700hp or more in stock form.
Both a super awesome, practical build & a wonderfully informational and edited video!
I've been thinking about this combo for a few years now to drop in my forester off road toy. What engine management were you using?
I use Haltech Elite for most all my builds. I have a number of videos about EM, including how I wired this build if you're interested!
I will check them out, thanks@@BlackthumbTV
Is there anyway to do more equal length headers on these to make potentially make a closer sound to a Porsche? My buddy had a SVX motor in his legacy it had a 911 rasp to it.
oh my god my mind got WAY too blown at "scan a ruler" and I immediately flashed to like 5 past projects where that would have saved a LOT of tinkering.
i love it, minus the engine mounts lol
so for all my custom with a k builds, get ya a set of late 90's early 00's gm torque mounts for a 3100-3800 series engine car (transverse mount) they'll mount to just about anywhere you can weld two 3/16th plates to, and 2 bolts per mount, keeps the engine from rocking back or throwing itself forward on every shift :) love the build again, not being a keyboard warrior
Would love to see how you tuned this thing! Knowing turbo Subarus and Subarus in general, I’m curious how it was tuned to accept the supercharger boost (also love the sound of H6s, miss my Tribeca). That thing needs some raptor headers!
Honestly, the secret in my builds usually comes down to two things: Run E85, and temper your expectations.
E85 is practically race fuel with that high octane rating it has. I've never had any det on my builds, mostly because my builds are "low power" (IE 500hp or less).
I also temper my expectations, meaning I don't push things too far. And if I do, I'm already comfortable with the fact that I'll probably blow it up.
That's genius.
The only thing that you could do is have trumpet shaped intake runners so that the trumpet opened flush with base of the inlet.
Sometimes they fit a throttle before and after the blower to equalise pressure in blower during idle/ closed throttle as some blowers blow seals.
ITBs and pre blower throttle?
Maybe have 2 speeds for blower if you really want to show off!❤
love that quiet whirling-whine of the supercharger
You make it sound so simple when it is absolutely not. Great video!
Underrated channel. I'm looking forward to more videos, man.
I hope the best for this channel, in depth and entertaining all at the same time ❤️