Dyno testing a bone stock LM7
ฝัง
- เผยแพร่เมื่อ 22 ส.ค. 2024
- If you tuned in last time, you know I'm permanently removing the 5.3 liter LM7 which came in the UglyTruck in favor of something a little larger and much more unique. Its served faithfully for 327,000 miles, but its time to de-LS swap my Silverado and install a L18 Vortec 8.1 in its place.
Yes, its a heavier engine which uses a lot of fuel and has nearly no aftermarket support, but come on. How cool is a big block powered muscle truck? I'm all about making power and torque, and what better way than a nearly 500 cubic inch engine. Stay tuned for progress...
Visit tolmanperformance.com/collections/all and grab a shirt or hat today!
Don't forget to like and subscribe to the channel, and for more behind the scenes content and pictures of projects, you can Follow us on FaceBook
/ lttolman
For business inquiries, email tolmanperformance@gmail.com
![[TH] 2024 PMSL SEA W2D2 | Fall | เครื่องร้อน พร้อมลุย](http://i.ytimg.com/vi/JO2_bLow_1Y/mqdefault.jpg)
It’s that low end torque from a big block that makes it desirable and fun to drive
exactly
7:00 “the LS is overblown, overdone”. You are my hero today
lol, thanks man!
Totally disagree. Its like saying too much money
That is actually pretty impressive for something rated at what like 295hp and 325 TQ at the crank
Agreed with drivetrain loss that’s very little engine hp loss in 300k miles
Mine is rated 270hp and 315lbs of torque
Hmm interesting my 04 z71 made 227/246 with a 4inch lift and 33s only thing done is k&n drop in filter,corsa cat back. Guess big tires mainly kill torque?
@@christophermix6845 Did you regear?
@@54inches nope Still stock 3:73s.
Such a lucky boy, to be on the dyno with his dad , that kid is gonna have a beautiful childhood. .........you rock LT....
I thought that was pretty rad the dyno operator let him be in the truck.
Glad someone out there is still looking to be original and think outside the box. The single turbo LS swap builds in every car at the car show gets old pretty quickly.
thats pretty much the whole reason behind this build
I’m so excited for this build! I’ve actually wanted to do the exact same build (minus the turbo and lowering) on my 05 Tahoe! Can’t wait to see the finished product!
thanks! I cant wait to feel all the torque this big block makes
Your intro y’all, and how you talk, makes you sound like you have a tv show and this is a good episode. Reminds me of a show on motor trend. Keep it up!
Thanks man!
You’re right, all those fast / cheap cars and trucks are just a figment of EVERYONES imagination.
Never said the LS wasn’t inexpensive and powerful, it’s just that’s not the point for this build.
No offense, but maybe you didn't read your click bate title.....
If I've learned anything from watching Richard Holdener's LS videos, it's that they make great power, as long as you're not measuring below 3000rpm 😉
BBC will be sweet
I thought the same thing the first time I drove my LS3 powered C6. I thought it would have a lot more torque down low. It’s not bad but it doesn’t really come alive until around 3k. Good thing its so light. I could see it being a dog below 3k in something heavier.
That's what a aftermarket torque converter is for :D
@@TurboNFRStwoK could be worse. If it was a coyote it would be a dog under 5000 rpm and make the same top end power as an LS
@@konnerkramer329 I like ford and dodge and Chevy. Seems like alot of Chevy guys are but hurt over ford, ford guys LOVE That. You notice there's no ford guys on here bashing the LS like they were caught under the bleachers with the fat chick, I'm mad😡
@@TurboNFRStwoK really?
My LS trucks have noticable low end power between 1200-3000 RPMs.
Maybe the lower gears are the reason your Corvette feels sluggish.
Who cares what the big engine critics think. Its a neat change of pace. If it doesn't work out with the 8.1 you can always put a 5.3 or 6.0 back in. I like your project because you're using stock parts with some aftermarket thrown in instead of the typical money cannon being shot for all new everything.
For sure, it’s all about usable power for me. The nice thing about the big engine is it will make tons of torque at a comfortable RPM rather than having to spin it a lot faster
Gotta say man, I was kinda hoping for a supercharged 6.0....but this....this is cool too! Can't wait to see the build!
That's why I'm putting a 461 Olds in my Custom Cruiser woody wagon. I looked into doing a 5.3 ls single turbo swap. But when I saw a TH-cam video of a Bobcat skid loader with a 5.3 ls in it, I decided to go the Olds route.
Never been an LS fan. I think they're heartless soulless power units. BIG BLOCK CHEVYS ROCK
My 650 hp Silverado puts a giant smile on my face while I do 70mph rolling burnouts. It’s definitely heartless. 🙄
What an idiotic comment lol
Raylor engineering makes everything for these 8.1s! Its gunna make some serious power
I like how he talks when he’s not talking like he’s on tv
Haha right lol
running a 8.1 and 4l80e in my 02 2500; 340k on the clock and running strong; all original!
LS swap everything
Take out the LS you mean, right?
nah, ill stick with my big block mopar.
Sounds painfully boring but efficient
there is actually a massive amount of aftermarket parts and support for a big block
and a Big block has a more power potential than an LS just because of the cubic inch advantage
yes, you can make 1200-1400 at the tire with an LS relatively easily with the right parts, but invest the same amount of time and money building a big block, and you end up with a lot more power and torque
I'd love to wind up with anything even close to 1,000
My brothers truck 04 2500 hd with 6.0 lq4 and 4L80E just put down 685hp n 751 tq at wheels with 35 inch tires. Stock intake stock manifolds stock throttle boy heads never been off motor all on pump gas with a mail order nelson tune rear mount 76mm turbo 16 psi and a small cam from texas speed
“Getting dizzy and motion sick” lol if I was in the passenger seat I’d ask to get out and climb in the back bed 😂😂
1972 Pontiac 455 HO
1990 LT5 ZR-1
2015 6.2 Silverado
Like em all .
Good luck with the 8.1, variety is the spice of life.
thats quite the variety of cars you have there!
Im gonna say people will be taken by surprise at the power level once boosted. Love the build man
I love the 8.1.
Best engine gm made I think.
Same mileage as 6.0 with Gobbs more pulling power.
They were great. I wish they got the same upgrades as the LS engines. They could have gone to better flowing aluminum heads upped the compression and maybe got direct or dual injection when the LT versions came out. But there is hope. GM has a 454 LS engine that uses the LSX block which is sold to OEM installers. One can dream that they will put it in the 2500/3500 Pickup in response to Fords 7.3L
That was a 2000 version of the lm7 too .. the later versions had a bump in HP and especially torque . 05-07 lm7 were rated 295hp 335ft torque !
I’m jealous you got to hit to go pedal on the dyno. Really excited to see this come together - one of my fantasy builds is an 81 Corvette with an 8.1L Vortec.
I couldn't agree more, the LS is way over played.
Thanks for doing something different and thanks for doing a big block.
The reasons you are going to an 8.1 are similar to why I build 455 Pontiacs for my cars, because I like to have 550ftlbs from 2000 to 5000rpm. It doesn't make sense to the guys who want to throw a lot of gear in and spin it to the moon, but its fun having a daily driver that runs 11s through the mufflers and does it all with a 3.08-3.55 gear. that 8.1 isn't going to like the 4.30 gear so much, but the overdrive will help along with the tall tires. Should be able to pull a trailer real easy. I'm putting a 6.0 in my 76 C10 because I have one sitting here, and I needed the Pontiac 400 I had in it for one of the GTOs. The 454 I put in after the 400 has no power, burns way to much gas, and is the most pathetic thing I have ever owned. Costs too much to make it run like one of my Pontiacs too, not that the LS swap is cheap. I am already into it for $2k and the $350 engine is still on the stand.
I like the bottom end that will pull harder with a 3.08 than with a 4.10, gives me more top end to go with the good 60ft and I can drive it anywhere.
Turbo the 5.3 and put out 700lbs of torque
3
@@sinistersilverado965 turbo the 455 and get 1000ft lbs of tq.
@@frigglebiscuit7484 A stock bottom end 4.8L/5.3L/6.0L will handle the turbo, will a stock 455?
Great video 👍👍. Definitely excited for the 8.1 hairdryer edition 💨. Different is way more fun.
I saw someone chassis Dyno test a 5.3 with a 4L65 and they said that it made just a hair over 100hp. They didn't have a comment section, but they really thought that they gained 400whp when they installed a cheap supercharger.
Need a david frieberger big blocks and flip flops shirt
Yep,there is nothing like the torque you get from a big block....
The amazing thing about the 5.3L truck engines is they run and run and...... I daily drive a 5.3 Tahoe with 230k on the clock. Remember when a car or truck was worn out at 100k or at least burned a qt of oil every 800 miles. That things gonna launch like crazy with the 8.1 with all that torque. A street light racing machine! BTW 19.9 yesterday and 20.1 less than 24 hours later, you’re gonna make the 30K
thanks for the kind words, and I certianly hope we make it to 30k! We've got about 5.5 weeks to go...
I got 2003 Tahoe with 5.3 with 160,000 miles and 3.73 rear end bone stock it puts a respectful numbers , 261 HP and 299.9 TQ
pretty good numbers for bone stock.
LT, thanks for bring awesome videos and the ugly truck. It’s going to be really interesting to see the transformation into a fire breathing beast. Please, please keep up the great work.
Will do! Thanks for watching
I’m planning on doing the 8.1 swap in my k20. After I move out of California next year.
LS Swaps are nice for one reason:ALOT, OF PARTS. And are reliable once DOD/AFM is turned off.
you cant argue with that, probably more parts for the LS than any other engine out there.
@@LawrenceTolman Yea. Alot more go fast parts as well.
Im looking forward to your build. But , honestly those numbers are impressive! For a truck with 327,000 miles on it.
As far as I can calculate, it’s lost essentially nothing as far as horsepower from the day it was new.
That old 5.3 would be cool on an old JD rideing lawnmower, Plenty of torque ;) and different.
I’m sure I could find something to put it in
LT!! My hero.. Love this swap. That truck is 4600#s I know I have one.. anyone that rides in that truck after this swap will rethink the lil 5.3 LS the world bs.. “TQ”most kids today have clue what that is.
That’s what I’m hoping!
Not a fan of a cold air intake and if it is a cheaper one like a Spectre or something like that it is not worth the time or money without extras or something like that. Would love to hear you chime in on this one for your professional opinion on this.
if its a true cold air intake that has a filter thats sealed from engine bay heat in a proper box and has good higher flow tubing, it is worth a few ponies. Will you notice a gain from seat of the pants? probably not much, but it will also give your engine a cooler sound which a lot of people enjoy.
Just joking around, but we're you a host on Trucks! ?? Lol. Sound exactly like one of those hosts.
I'm here to see how a stock lm7 performs because I have one to drop in my 85 camaro. Awesome video.
Also, I've assays wondered the process on a dyno run. Hearing the guy tell you what to do basically answered my questions. Haha
i did host Truck from 2015 to 2020, dyno's are a blast if you've never been on one
just heads up on the 8.1s they have fuel management system that chugs that big engine I have 2 01 2500hds 8.1s and one of them is stock and one is tuned I raced them and my tuned 8.1 pulls away on the stock one hope this helps oh yeah and both have allison trans.
There no replacement for large displacement.
I have a 7.4 in my 1998 chevy k3500 with a top end replacement and roller cam. Naturally aspirated it now has 522 hp and 630 tq.
No need for any LS engines
340 horsepower for the 8.1L I say that's really impressive I would atleast put better heads on it if you could I plan to go 8.1 with my 91 chevy C1500
What mods will wake up a stock lm7? K&N air filter, muffler to magnaflow / flowmaster and a tune? Not ready to do headers yet.
I have had a 2500 with 8.1 and Allison since brand new. I don’t plan to ever sell it
I'm honestly surprised how many people use a 5.3. 6.0 and 6.2 are easy to get and make great power. The 8.1 is harder to find and parts double in price.
5.3 ls truck engines are almost free in the junkyard and way more common. They usually aren't any more than a 4.8. A 6.0 is almost twice the cost used and a 6.2 is even more again. If your gonna boost it, you'll need a built trans either way, and a 5.3 gen4 is currently the fastest stock shortblock on earth. Unless your going for really big NA power, or have a connection to get one, a 5.3 will serve most people really well.
@@timothybayliss6680 sure man. Lol
For the turbo L18 will you be going with a rear mount system to keep all the amenities and probably ease of fabrication?
For the longest time I've wanted to L18 swap a RCSB i had but I never did due to the lack of aftermarket support and not being able to interchange from earlier gen BBCs.
i really don't like the remote mount systems, even though they are a lot easier to install. I'm gonna mount it up front on the passenger side of the engine, much like the LS guys do
Cool project!
I like to see different swaps / options
Subscribed!!
Thanks!
It's a runner!
Do you still do the show "Trucks" if so what are the other guys doing? Do they have a TH-cam channel?
Ha. As soon as you said they had a dyno at C&C I knew you were around Nashville.
yup, lived there from 2015 to 2020, beautiful area
@@LawrenceTolman ahh man. You moved????! So I can’t see that 8.1 in person? 😭
Hey LT, you forgot your kid back there. Another swap I can see in your future is a 3.0l Duramax
Dynoing the truck makes it sound like it has a turbo or centrifugal supercharger lol
Sure does. That was one of the loudest dynos I’ve been on.
Keep up the good videos LT 👍
This is why I put a 5.0 sbf in my 280z not another ls build
I would do an 8.1 too they go through bout 3 qts every 4kmile stock tho
Dude! Is that Franklin, TN? I've been to that cars and coffee before if so and it was really good. Me and my son (16 yrs old) are working on a car to take to places like that.
Yeah, that’s the Franklin cars and coffee.
I seen you on tik tok didn’t I? 😂😂
you probably did, I just started one a few days ago
Lol, are you kidding LT!
Before you did the segment swap on the computer for the 4l80e transmission did you have 1st gear? Or just 2nd gear?
When I had the 4l60 with the broken band, it had 1st and 3rd gear, no 2nd or 4th. I never tried driving it with the 4l80 and no tuning
I have an 03 Silverado 4x4 Z71. On a 4L60e to 4L80e trany swap. You know how you run the speed sensor wires on the trans to the red side and not the green side of the computer? Well on my truck, they're both red. I plugged it in to the first 22 and 23 slot i saw. So if they both have the same numbers. Wichone is it?
Comment for the algorithm 👍
We are looking forward to the 8.1 swap!
327,000 miles..... just broke in. And the ford and other guys say chevy is no good. Lol chevy for me all day till my death.
the 5.3 definitely earned its keep
What gear ratio does the truck have? Just Curious...
with a tune up the LM7 have more than that
Loving the new build, what tuning software do you personally use?
HP Tuners
Bone stock..? Wait! Do I see a CAI kit? Come on. Not even the free mods? TB bypass? Circumcising the egr tube? De-screening the maf? Just curious. I've got the basics and wanted to know ball park bc I'm not doing a before and after with my build. But I'm going with LQ9 shortblock, 243 that I'm in process of hand porting, sd parts ls6 power max cam, ported tbss intake and tb with xlink... Thru the 4l60e, wanting to get close to the 400whp mark if i go with long tubes. SD made 430 on engine dyno with unported tbss and 92mm tb. So being an iron LS2, I'm starting with a 400hp platform and running a slightly larger cam.
I just can't see nor have time to mess with a bbc swap in one of my DD'ers. I'm curious the 0-60 with the 8.1L in a 1500!! Add a blower.. Now that will be hella fun with tq for days!
I was waiting for it to blow up but I guess not my day🤷🏽♀️
no replacement for displacement
Amen brother!
Videos are slow like a Chevy!
Hurry up and drop that 8.1!
Hahahahaha
J/K your vids are great!
haha, thanks man! Ill have it one the road soon enough and Ill let ya know how slow it really is
Lawrence LT Tolman
Can’t wait man!
Just found your channel.
Im hearing what you are saying and do not fully disagree.
For sure im on board with Anti-LS swap movement, basically out of boredom. Ill eat my words one day when i do a junkyard ls/turbo swap (lol) but for now, i dunno, my biggest issue is thats all youtube consists of is LS the world.
Now here My plan out.
Being half a century old and a lifetime Oldsmobile fan, soon as i tie up some loose ends in life, im gonna throw together a square body chevrolet with an Olds 455, probably turbo400 with adapter plate for chev/bop.
I Really want a clean yet patina two tone 1973 K-20 on 35's for this.
A Holley...um...i think its called Avenger(?) using what may be the best aftermarket ecm out there but kit based on a square bore throttle body setup for weirdos like me who want to EFI their "lowly" Olds 455.
For the record i have a .030 over 462 olds '55 with steel 2 bolt caps (no girdle) flat top arias, custom Crane hyd roller (this cam has a cast dist gear pressed onto the billet shaft for stock typw distributors no need for bronze gear for street and longevity. Ported and flowed locally we did alot to the Edelbrock heads and the numbers still sucked. However with an old holley street dominator single plane and old BG modified 850 annular carb it made 620/620 hp/torque on the pump. Lots of little things i would/will be in future doing different to this combo in search for a 700+ n/a all oldsmobile engine for the street/strip 1970 442 which ive owned since 1983. Currently tore down to a roller, that car has to suffer thru the last 15 years of its owners life because life has not been kind for about the same amount of time.
So now that i got wayyyy off track on this comment and wrote a novel, may i try to pull all this back in for anyone who has read this far?
A solid basic built budget 455 Olds in a square body sounded like the plan until the old trucks cost more than some houses.
Now im thinking of a relatively clean 1989-1998 C or (preferrably) K 1500 or 2500.
Build and drive it on a carb for cheap then later do all that aftermarket throttle body efi updates later.
I like your idea stuffing the 8.1 if for no other reason than cheap different big block. Highlight "different"
Sounds like a fun project to me!
@@LawrenceTolman if you are interested in doing a 455 olds build im your man.
Ill keep you updated.
Life kinda sucks at the moment but im willing to help anyone who wants to follow my plan. Ive got 8 455 olds blocks in my basement for cores, lol.
Not to take away from the channel, the 8.1 has alot of potential as is. Ive always been a fan of this "unknown" big block chev
Think you proved why to LS swap, them kind of numbers with over 300k miles!
I do think the 8.1 swap is cool though so don’t get me wrong.
I was impressed honestly, its almost as if it hasnt really lost any power at all over the last 20 years.
LT, just curious, did you just pick up the your son (assuming) for the Dino ..... great job on you videos
Just met my wife and son there because no A/C in the uglytruck lol. Plus in case something broke
Well the stock cam is shit so ya a cam would make a big difference
LT you should have done an LT😂😂😂😂
There is so much aftermarket support for the BBC even late model. There is nothing budget friendly about building a BBC. compared to a sbc or LS series engine. jmho
An LS in to my 3rd gen camaro would bump me up by 100 hp by those numbers
is you're starting with a TBI 350, thats a pretty anemic engine.
@@LawrenceTolman na starting with a v6 but the 305 and the v6 have the same dyno sheet... Probably diffrent conditions
swap a fwd 3800 in it and turbo it. the fwd still have the rwd motor mounts.
This explains why my 5.3 pulls my little 17ft bass boat like a turd. Have a 6.0 lq4 and 4l80(I know how generic) that will hopefully improve. Might do a small turbo. Good luck on your 8.1 very interesting swap
Wait......where did your son go? Did you leave him there 😂 jk man great video
lol... he likes to ride in the wifes car with the A/C working. I dont blame him
@@LawrenceTolman can't blame him myself thanks for the response love your work man
Wait a minute... Weren't you on a TV show?
I was
Hes from that engine show I cant remember the name, but i remember his voice haha
@@LawrenceTolman ohhhhh "TruckU"
i was going to vote this up but it was at 666 and i thought that was nice
How are you getting those numbers from the 5.3? I've got a fairly fresh rebuilt with about 10k miles. And, it took some serious tweaking of the tune to get it up to 230hp. And, didn't get much more than that for torque.
Its rated stock at 285hp at the flywheel, so to get 230 at the wheels sounds about right to me... could be a difference between a dyno or something?
@@LawrenceTolman
Thanks for responding. Sorry to hear that you left Truck Tech. Been trying to keep up on ugly truck. Very cool project, by the way. I was just curious about the numbers. You pulled 232/290 something like that from a 300,000 mile motor. And, we had to make several tuning runs on the dyno to get mine up to that.
@@LawrenceTolman
Guess some clarification might be in order. Working with an 02 1500 Z71.
When any other engine manufacturer can take a single cam pushrod motor with 300,000 miles and put it in a foxbody mustang with an untouched bottom end chinese head studs btr turbo cam and fitech efi and run 5.30's in the 1/8 mile then you have something to brag about the LS engine is the only one that will do it and STAY TOGETHER and it was a 5.3 so its kinda stupid to remove it when it would run circles around that 8.1 with a simple cam swap and a 5.30 at my local track is something watch chuck jeff lutz and fireball make a pass at rogersville drag strip in Tennessee
lol no, the ls is not the only one that will do it. jesus, you ls fanboys need help.
@@frigglebiscuit7484 were is the proof what stock single cam small block can do it it ant a ford i can tell you that he had a 351 based stroker in the car that blew up put the 5.3 with a cam in the car and it went faster than the ford you LS haters need to wake up buy one and find out for yourself
I’m also surprised at the dyno numbers on your LM7. I’ve got an L33 in my 2007 classic with a baby cam, CAI, and cat back exhaust, tune and I am in the 290s horsepower and torque. I also have right at 100,000 miles less than you. Do you my 285/75R17 tires destroy my torque numbers on the dyno?
so mine did 230hp and 296tq at the wheels bone stock, and you have a small cam, cold air intake, and exhuast which assuming an equal baseline, you've added approx 60hp at the wheels. Sounds about right to me for your setup, but yes, the larger tires will soak up a little more horsepower (not a ton, but some)
I wasn’t specific enough It’s the torque number that surprised me.
Thanks for the reply and keep putting out the good videos.
I've heard the 8.1 spin bearings, but who knows you hear alot of junk these days.
I work on them (L18)often in propane trucks, they run the piss out of them but not high rpm, some oiling mods might be a good idea for higher rpm but basically your saying a bbc is bearing spin prone.. I can promise you it’s about as prone as a SBC spinning one.
@@01fxdlse Agreed they have priority main oiling and a larger pump than a small block. If a bearing has spun, like truly spun where it has grabbed the crank and turned in its seat then I bet there was no oil.
Will you be selling the 5.3
Not sure what the plans are for it just yet...
What exhaust system do you have on her?
at the time here, it was a 4" Flowmaster Hushpower Pro Series Muffler, with full stock cats in place
@@LawrenceTolman sounds real nice brother
I'll take your junk 5.3 if you're looking to get rid of it.
Could throw a real curve ball in there and do a 427 ford cammer
I'd hate to see how much it would cost to find or even buy one of those.
It's definitely not an LM7 😅
Here ya go lol
th-cam.com/video/A7CFRGkKu2g/w-d-xo.html
How the hell can you bash ls that's in the Same family as Gm BBC sbc. You making no sense. No sir you just don't know how to build an Ls . I don't get people that bash anything Gm while running another GM motor. If you trying to sticky cm for Ls guys . Your one video want change our minds.
John Salary it’s not about getting anyone to change their mind, it’s a about taking the path less traveled. I have built plenty of LS and many other engines in my career which make good power, and in this very video I point out how the LS is a great platform for making horsepower, has inexpensive parts, is lightweight and compact. I never said the 8.1 is superior (in fact I almost said it’s not...) but I just want a challenge and to do something that’s not the same as 50 million other projects.
lets be honest here, how many people who do ls swaps actually DO know how to build an ls? all they do is plop it in the car, turbocharge it, and act like they have done something.