JUNKYARD L99 4.3L V8 + CHEAP NOS=BIG POWER
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- FULL DYNO RESULTS-LOW BUCK POWER ADDER-3 NOS JETS TESTED! CHECK OUT WHAT HAPPENED WHEN WE ADDED AN INEXPENSIVE NOS SNIPER NITROUS SYSTEM TO OUR JUNKYARD 4.3L L99 (BABY LT1). AFTER RUNNING WITH A GM PERFORMANCE CARB INTAKE AND 650 HOlLEY, WE INSTALLED THE PLATE NITROUS SYSTEM. WE TESTED 42, 46 AND 53 NITROUS JETTING. CHECK OUT WHAT HAPPENED WHEN WE MADE NA RUNS WITH JUST THE NITROUS PLATE!
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I like the comparison you're doing between NA and injected too. This is getting better and better. ☺
Its tons easier to follow the informations i agree!!!!!
Love the off the wall engines you do. Keep them coming and thanks for the entertainment!!
I second this motion...can't wait for the amc v8 videos!! Hint hint nudge nudge
This is not an odd engine it is just 265 CID0 the V6 is 262 CID
@@ericmuhlbeier8023 just a Dodge
Cool stuff for sure, if you want the best of Off the shelf COMBO, that will REV then do this build.... I just finished put a 262 CID v8 (Monza/Nova) 1975-1976 crankshaft with a 3.10 stoke large journal in a 350 block bored .060 with the OEM Chevy 1994-1995 connecting Rod (5.940) , use a standard 350cid piston now you have 321cid of the very best COMBO, Large Bore - Short Stroke that will rev like a orginal DZ302 but better with a .100 stroked crankshaft/OEM and powered metal connecting Rod !!!
I built a mild version and it's super Cool that we can use ALL OEM parts !
This is the real Combination that Richard should put together , it's Wild that this is possible and MOST people don't know that this is possible !
Crankshafts are hard to find , or just build a small journal 302cid that is almost as Cool......
Its 265, the v6 is 262
@@shadowopsairman1583 The little 262 V8 out of the '75 & '76 Chevy Monza. Not to be confused with the 4.3 V6.
The 1975&1976 optional motor for the Monza was the 262cid V8 engine ! Not a 6 cylinder.....
There's always gonna be a special place in my heart for LT stuff! The LT1 in my Firebird formula i got a month or two before my 18th birthday was the first build that I chose every part of the setup my self and put together well it was a stock bottom end with some ring gap it basically got a Advanced Inductions nasty nitrous cam and they CNC'ed the factory heads a lt4 intake at first with a nx plate but we could never get the tuning 100% right so it got a gmpp single plane intake and a pretty nice built 750cfm double pumper and a old n.o.s 2 stage plate it had a th350 and ptc converter a 4.30 rear gear and a few suspension parts and pieces but it ran 6.70's with a full interior and drove on the street alot that was pretty fast back in 2009/2010 i was 19 or 20 when i finally figured the car out
I'm still drooling with anticipation for that Ford300 i6. Thanks for these videos.
All the LS motor cylinder heads flow very well to .600 lift. Can't go wrong with a better than stock cam and nitrous, turbo, or blower!
All engines love nitrous until the hard parts give up. :-)
maybe run nitrous on the hyster ? :P
@@futten3230 I decided to just use more cubes rather than giggle gas to get my torque numbers up. :-)
bcbloc02 por que no los dos
T-SHIRT material right there !
The tuner must tune it rich enough to live for a long time, if that's what they want. Keep piston speeds in check and use that nitrous. I've had stock engines I've given away to family that are still running with nitrous use. However, I have changed out alot of factory head gaskets that fail on light nitrous use...
Fun stuff. I didnt even know there was a 4.3 V8.
Just another terrific set of videos. You do a fabulous job. Thank you.
I like the idea of nitrous for drag racing. But I'll never drag race my LT1 Roadmaster. I just want to have fun on the street
Then you will lust after it on 75-125 hp shot of nitrous. It will live forever with that lower amount of nitrous and fuel. I have nitrous on 7 street engines and two motorcycles. You won't have to keep it floored but you will want to, lol. Great motor, never been a fan of the opti-spark distributor behind the water pump, however it has a decent service life. Never touched it in my 1997 Camaro Z-28, but did in several friends/families engines.
I can't wait until you're done with this pooch and stuff the crank and rods into that 5.7 LT1. 😁
Right! I thought I heard him say that. The original DZ 302 won races and would be a cool build with the newer LT1 stuff. I wanna see it too!
Read an article years ago where a magazine did this. I think it comes out with an unfavorable rod ratio using l99 rods. Not real strong either. Forgot what pistons they used.
@@rkinni it ends up being nearly 2:1 similar to Formula 1 and sport bike engines. It's actually a pretty good combo if you build the valvetrain to be able to spin up to the rpm capability of the bottom end. With a stroke that short she'll wind to 8k like it's nothing if you can control the valves. That's usually the weak point. Piston speed at that rpm is still pretty safe for stock parts.
@@rkinni but it'll be the same crank and rods but with the bigger bore of the 350 pistons and block. Set of maybe better rod bolts? No diff than the DZ 302, I'm thinking .
jr78racer I thought I remember something being unfavorable. It's been done already, but really think they used different rods. I'll try and find the article. It was over 10 years ago, maybe more.
Interesting to see what happens with the addition of the nitrous spacer. Those small cube engines are a little picky it seems. Would like to see the cam specs on that L99, and looking forward to a bit of camshaft and some boost!
I'm most excited to see how well it responds to a cam swap
Yessir!!
Great test! I really appreciate these episodes Richard. They're entertaining and informative.
Ever plan on doing anything with a junkyard 305? A vortech head/small Cam/ blow-thru turbo 305 would be a hoot and 305's are practically free
305 vids are up-including supercharged
Thanks Richard! Apparently I need to spend more time wandering through your channel
I want to see that thing with the stock LT1 intake, mild "turbo" cam 🤣 , bigger injectors, AND 2 turbos + air to water aftercooler making 430hp or better.
i guess ill be taking out my 1" spacer from my recent upgrades of vortec heads,edlebrock rpm intake and holley 650 swap.the upside is my hood will close again,lol
If you have a 350, that's almost 100 more cubes and it could be different. Still gotta test every change and give it what it wants
Makes you realize how refined the factory Mustang 5.0L Coyote naturally aspirated engine is. 460 HP 420 torque
Started following you when I cane across some of your LT1 stuff. Great engines, just like all SBC's.
Very durable and little understood.
Mine makes 259,292 at the rear tire on my 93 Corvette. Good enough for 13.38@105.
Keep the videos coming!
This series has made me very proud of my M60B44 build that should be putting out somewhere between 325 and 350hp.
Kind of underwhelming, but it was expected seeing how it had a stock cam and those terrible heads. Curious to see what a decent set of heads and cam will do for it.
Cool. Honestly had never heard of the 4.3 v8. Probably cause everyone just said it’s a lt1. Neat to see how it reacted oddly to the spacer, the cam will be really cool to see it roll with for sure!
I think it was the carb jets that made hp drop after installing the nitrous plate running the dyno without nitrous. I dont think the plate would cause an 11 hp drop.
Looking forward the rest of the lt1 series
Rich, a few of us have asked for you to run an Olds 260 4.3L V8 (IF you can find one) and step it up to see what kind of power it can make. I realize that they aren't a powerhouse (110 HP/205 lb ft), but I have ALWAYS wanted to see someone attempt to build one and either boost it or do a high compression nitrous build on one. I think that would be really interesting to see you go from such a low power level to making a good amount with a turd of an engine.
Drove one once, seemed peppy and more than 110 horse to me.
Such a intriguing engine
sounded like the NA run the engine hit v-tec suddenly :P
How would she respond to a set of 305 Vortec heads and an increased rocker ratio?
are those heads reverse cooiing?
They are not reverse cooling. Good catch, I completely overlooked that.
Lt1 heads!???
I’m on the way to building a de-stroked 350. Still deciding on 2.600 or 3.00 crank. The bosses Porsche 911 is going to like an EFI ethanol short stroke build. Hello 9500!
LESS STROKE IS NOT THE ISSUE WITH 9500 RPM BUT GOOD LUCK
Wow 30 deg. On the N/A. Those heads must have a good combustion chamber.
7:26. Air:Fuel ratio is much less of a factor in making power than optimal ignition timing! Just 3 degrees killed a lot on this engine.
I used to think the baby lt1 was a6 cylinder version. Very cool
Thats awesome, I didn't know that the general produced that engine.....?
Richard; You mentioned forged pistons & long rods for a later 302 build (after the 5.94" rod and 350 piston.) I would like to know if an LS rod could be substituted as a cheap long-rod option. I have a used set of LS7 rods (titanium, 6.067") I wanted to pair with a Ross lightweight piston (90756)
I would have to look at measurement and offset
It's crazy that Honda makes same amount of power stock in 4 Cylinders and less than half the displacement and still more reliably.. I don't know how they do it.. 😅
SMALLER MOTOR, LIGHTER CRANK, RODS, PISTONS,, BETTER CYLINDER HEADS , HIGHER COMPRESSION, HIGHER RPM , PROBABLY BETTER AIR INTAKE SYSTEM
nice video I remember way back in time like over 30 yrs LOL ya I'm old .before edelbrock made there manifoldPart Number: 350-75011 . Grind about 3/4 out of the center to gain more power at higher RPM So I'm surprised to see your results losing power .
If you can upgrade the spring on the 5.7 lt1 because if had valve float
Great job, Richard!
Great test and lustration. Thanks for info and data including timing. So the ring gap was ok?
The dual plane that you used is somewhat big for the 4300. It would be interesting if you used the factory cast iron intake that GM used that would fit these heads.
gm never put a carb intake on this motor
@@richardholdener1727 Yes you are correct. I wasn't thinking it through
I was thinking of the intake used on the 87-88 montecarlos and others that had the 4 center mounting bolts that were vertical. You would have to modify it like the TPI intake. But of course it has a distributor hole. Thank for all your hard work on all your videos.
Yeah buddy!! Love to see those candles lit
I have a crossfire injection system every thing but the ecm as I didn't get it pulled before the car had to go
Richard you need sleep fun is fun but damn your the man......you
I'm sure heads are crap maybe some 5.7 heads will work. Best thing is port heads. My 4.3 V8 just needed to breath, I descreened MAF sensor screen. Also made holes in bottom of air box.
Richard, please swing for the fences when it comes to boosting this thing. I don't need to see it explode but we both know you could push your jy test engines harder. We all wanna see this thing hit 30psi on e85 or race gas.
that's not the goal of every dyno session
@@richardholdener1727 Understood. I think you would capture a wider audience if you really leaned on these jy engines more.
I love the series of tests !
Love the shirt!!✌
Nice experimenting......you've got the best job in the world. I know that the LS motors are extremely popular due to their simplicity and cost but I'd sure like to see some of the Ford stuff played with in the same fashion.....or Mopar, for that matter. Thanks for the upload. Lot of HP for about 260 cubes.......my brother had a 260 Ford motor back in the day we had in an early Comet.......I know it didn't make that kind of HP but we put a lot of work in it and it is doubly satisfying when those little watch-winder motors turn out good TQ and HP numbers. He had a lot of fun with that car.
i just watched a video of a 55 chevy with the original 265 v8(done up for drag racing) and it easily yanks the wheels(oh,and revs to 9000 rpm as well)small cubes rock
@@trillrifaxegrindor4411 Yeah, those small-blocks wind up to the point only dogs can hear them.
surprised how much it didn't like the spacer/plate!
OMG THANK YOU RICH!! I KNOW THAT YOU KNOW WHY!!
Right on
Coyote stuff!
Love those LT1s
Nice stuff! An question: Can you test this engine with efi intake manifold and AFR heads? Just to see which power it can make to this engine
not sure they make heads with valves that will fit this bire size
@@richardholdener1727 maybe factory vortec heads ported? They fit on 305's with same bore correct?
@@richardholdener1727 trick flow small bore
@@tacozilla3762 won't work, not setup for the reverse cooling.
@@richardholdener1727 sadly
Torqstorm supercharger???
With as much boost as possible
How much power does 0.7L make? Please put the L99 crank and rods in a L31 block, heads, carb intake & add 5cc dome pistons to keep the compression comparable with a stock junk yard L31 Vortec and run it the same way you ran the carb L31 5.7L.
When you build the DZ out of this you can put it in the nova,call it a janko nova
Why does this sound so good?
💯
What is the actual runner length for the LT1 vs the L98
I actually had to argue the existence of this engine a few years ago to some people I knew.
People that don't follow or build engines never know. I do and come across engines I've never seen or heard of, lol. Also, thats alot of power from that stock 4.3. I'll take the two extra cylinders everday.
Haha yep, did the same thing with Mopar guys regarding the 350 cid "B" block.
Can you tap and plumb the intake manifold for nitrous jets to avoid the 3-4% power loss caused by the nitrous plate?
you could
Great video
How about a Pontiac head comparison Edelbrock vs speedmaster
Little disappointing that these had better compression and port technology into them but even ran on gross hp they don't make 1hp per c.i. Still cool. I like the gen 2s
peanut cam doesn't help them.add an appropriate mild cam and it would be 1 hp per cube
My question is why wait so hi in the rpm range to hit the n.o.s. I was always told 3200rpm smash button. Never used so a little ignorant
you can activate it where you want
@@richardholdener1727 i wasn't sure if there was a reason thank you
If you have to ask who's ready for nitrous then I'm watching the wrong channel😂
Wonder what a cam and a little work would do
cams going in today
What we've learned is that engine is a boat anchor
Why does it only pull to 4500?Cam I guess.Small valves.Iwonder what the most hp you can make in an engine at peak 5000 rpm.
not sure where you see 4500
So take the plate off and drill and tap the manifold?
for what?
?
I think he means to run the nitrous without that spacer that hurt performance
Please make a high rpm short block with big heads. Shouldn't this thing scream with the smaller displacement?
What cylinder heads that I can't use on my L98? I want to build a non roller cam 4 bolt main 350ci motor with the Erson TQ20 duration @50 214in and 214ex lift is 472 both intake and exhaust 10:1 compression. I'm shooting for 320hp and 360 foot pounds of torque at the flywheel. Just nice daily driver with a civilized idle. Would the stock 113 heads be fine for this application?
the l98 heads work well for that application-what intake?
@@richardholdener1727 Do you think 320hp is achievable with the parts I've mentioned? The TPI has fully ported and polished.Throttle body Runners, plenum and lower manifold.
Nitrous Oxide isn't for a daily driver.
265cid isn't odd
NOS is perfect for a daily
How long will a motor last with adding Nitrous? Can a daily drive run on NOS for things like pulling a trailer behind my 2006 chevy HD2500 long bed with a 6.0L>
Motor boat, your chick is funny, Motor Boat
i ran my 5.0L Mustang for three years on nitrous-then to a blower
Wouldn't use n02 for that, very likely to go boom with that much load. You'd like a supercharger/procharger and get a lot more life out of the motor.
Can a 7.3 diesel be rebuilt to take gas...heads pistons etc ?
YOU'D NEED TO DROP COMPRESSION TO BURN GASOLINE AND HEADS DONT HAVE SPARK PLUGS , PROBABLY A FEW OTHER THINGS
Dude you are just cool.
Try a single plane intake
would be bad judging by the effect of the spacer plate
No timing pull with e85 more power less loss
Interesting stuff on the baby Gen II !! Any chance have a set of fact aluminum heads to see if rumours of cast iron heads having different and superior design?
good point,would like to see the aluminum LT1 heads and also the L31 vortec heads all compared on this engine.
Big valves won't clear the small bore, and the compression would drop way off.
Don't think you can use vortec-might be able to use LT1 (not sure of valve clearance on small bore)
That would be an interesting test on 5.7. Irons supposedly flow a bit more but do have larger chambers so compression drops a bit.
NEXT: 366 Big Block Chevy BOOST PIG
👐
What about the ring gaps?
still original
I have a question...
Is the L99 two bolt or four bolt mains? At the power level you’re currently at, I know it doesn’t matter at all...
Just curious..
Great test as always 😁👍🏼
likely a 2-won't know til we yank it apart
Only the Corvette Lt1 has 4 bolt mains, all other versions got a 2 bolt setup. Basically aside from the intake and differences in bore and rod length the 4.3 is identical to a Caprice Lt1.
It is a 2-bolt main. The webbing on the 2-bolt blocks is actually stronger than the 4-bolt blocks.
engauge the NOS sooner at 3000 rpm
do an old 500 plus cubic inch chevy v6. yup yall heard that right. they were produced
GMC specific, not shared with chevrolet. 478 was the biggest v6. They are monsters for sure
been a long time since ive read about them. but ya your correct. IF you could find one. throw some spray on it. would be somethin different for sure
@@darinr9424 I've always wanted to see boost too, they're build like tanks and have low compression ratios. I'd think they'd be hard to break. The 305s aren't too hard to find but the bigger ones seem to be hen's teeth.
If you could make a wedge or rounded top on the split in the plenum would it stop any saver turbulence in the airflow
it's not turbulence-its carb signal
You ever test the torker 289 intake that has the twisted carb flange?
yes
@@richardholdener1727 love to see the results on it one day I'm an avid fan I'm enjoying everything you've been doing keep up the good work and the happy hour video with your wife was great
why so you start the nitrous at 4k?? i started it on my 355 LT1 at 3k.
feel free to start where you want
@@richardholdener1727 Let me clarify my question. wouldn't starting it at 3k make it settle out better so you can see the power gains better?
Did it have a vacuum leak when the spacer was added?
no sir
That was always a sad little engine. I'd go straight to the big bang with a 300 shot
Awesome videos Richard. Any idea how many miles this motor has on it?
I don't
Most boneyards will always have the low mileage engine your looking for.
Most boneyards will always have the low mileage engine your looking for.
Would knife edging the divider on the dual plane help when using a spacer? I be curious about what kind of RPM levels that set up can withstand.
knife edging is for flow
@@richardholdener1727 Just thinking that flat band down the center might be creating turbulence, messing with the flow.
@@bradmaas6875 Turbulence is largely irrelevant until the intake starts to choke. Single plane intakes don't give as strong a signal to the carb, especially down low, so they tend to hurt low speed power and torque. They make up for it at high RPM with higher flow and better scavenging, but only if they're designed for it. The dual plane with a spacer ends up the worst of both worlds.
@@RyanRapetti so porting and polishing, port matching, all those things we've been doing to increase flow and reduce turbulence is largely irrelevant?
@@bradmaas6875 at low rpm, yes. All of that work is to maximize flow at the limit of what the intake is capable of. The spacer gives you a bad carb signal without the larger plenum of a single plane, so you don't get anything back. A dual plane intake is designed as two intakes in one, each with a slightly different tuned rpm, and feeding cylinders 180 degrees apart. Breaking that seal between the two intakes subverts the design intent and hurts power.
Would love to see the same test on a 4.3 V6
Does this engine use normal LT1/LT4 cams?
yes-just mild versions
What about a turbo
Like a 60mm?
that works too
@@richardholdener1727
I remember a t04 kit you used from the TPI and boost video
I would love to see a 400 hp 4.3
put 3 degrees back in it and spray it!
Cams then supercharger
Msd multi box
thumbed
L99 testing in the Nova?