HOW TO: MAXIMUM 4.8L LS POWER-383 STROKER VS JUNKYARD TURBO BOOST-THE REPLACEMENT FOR DISPLACEMENT?

[@hill_customs6807]

Kinda feel the need to specify that the 383 motor can be built from any of the small displacement motors. 4.8/5.3/5.7. Not just the 4.8. Just in case some people don't know that. 👍 Also if your going to spend the money on a stroker kit start with the 6.0 and do a 408. Or bigger. 😃

[@shadowopsairman1583]

293, 325, 364 (4.8, 5.3, 6.0)

[@hill_customs6807]

@@shadowopsairman1583 yes we all know the original displacements or these motors. Thanks.

[@thatgreenrcsb]

Hey richard, it's Charlie from ohio. I'm building a very interesting setup based on a SBE 4.8. has a LS1 stage 3 BTR cam, a set of milled .030" 799's, TBSS intake, 1.75" headers, and good valvetrain parts. I think it should run well. Going in my Fairmont in front of a T5 transmission... I'm hoping the lack of low end torque will allow it to live until I can afford a t56. As always man I love the videos.

[@kennethpowers8995]

It should hold up OK on the T-5 as long as you don’t get too crafty with traction and try to dead hook the thing a ton. Fairmonts aren’t super heavy and that helps the cause. I would keep a radial on the car so you get some tire spin under hard launches if you wanna save the gearbox and also use a good clutch so you can slip it out of the hole and save some shock on the cogs in the gearbox. I’ve used those Tremec 5 speeds behind boosted SBF setups making upwards of 500 HP and had them survive just fine on the street, but they like to check out when you start putting sticky tires on and doing aggressive or “no lift” shifts on a well prepped track. My WC T-5 lasted the longest (93 Cobra pull out) and I ran that behind an 8.2 deck 331 on spray, but as I said even base T-5s have worked for me at high(ish) power levels if you baby the shifts. If all else fails, T-5s are a dime a dozen so you can always keep swapping them out when they break until you get a 6 speed.

[@thatgreenrcsb]

@@kennethpowers8995 I'm using a NWC GM t5 from an 80's Camaro. I've had many mustangs over the years and if I never drop the hammer it should last. Car is minitubbed with 315/35/17 mickey Thompson Street comps on FR500's. Has a built 8.8, cobra brakes all the way around and coilovers on all 4 corners. Had a 01 cobra 4v and a 96 cobra t45 that didn't last long. I'm using a McCloud RST clutch, custom hydro clutch and Terminator X for engine management.

[@sinistersilverado965]

Richard, you are the hardest working KZbinr

[@Brock_Landers]

These 4.8s never fail to amaze me.

[@shadowopsairman1583]

LR4, LM7, LQ4/9 (293, 325, 364 4.8, 5.3, 6.0)

[@dannytravis7118]

This ls stuff is awesome. I remember back to the old small block Chevy and back then 400 to 450 hp was the normal and 383 stroker was good for 500 hp the really expensive builds could get 625 or so. Time and technology has been good to gearheads

[@shadowopsairman1583]

Considering the LS1 has been around since 1995 (1996) in the Corvette and 1998(1999) in the GMT800, and production ended in 2016,that's 20 years of 1 engine platform that resulted in the Gen 5 LT1, yeah aftermarket is going to be bigger. The Chevrolet Atlas Engine was unfortunately short lived did not have aftermarket performance parts.

[@ijmodified]

383 or 408 with the turbo 🤩 all day everyday, but always wanted to build a 468 sbc with bbc ports with twin Wuhan warrior whisle's in a 1987 awd audi 4000sc for the chassis

[@jamesgeorge4874]

Boost is just a multiplication factor. The best multiplcation factor.

[@jamesgeorge4874]

@Rex Warren A man of good taste, and education you are, sir.

[@colinjohnson7663]

Literally debating this topic in my head last week. Richard you know your audience (maybe too well) and I love what you do

[@LSturboguy]

Richard you my frient are a great place to go if you want to do something like boost, strokers, cams and heads you save folks a lot of time and money as you have aleady dynoed it keep up the great work

[@bcbloc02]

Some of those wwII airplane motors made some crazy hp for a long time with the help of boost and water injection! Boost lets you make power to the limit of your hard parts pretty fast if you just keep turning it up.

[@ajjskins]

Hey Richard could you go through the entire process of setting up an EFI system on an LS everything from it not starting to getting it to the point where you can safely Dino run. I recently saw a video of a guy Dyno testing a 900 hp 5.3 but the initial map and everything on it was so bad it couldn’t start and wouldn’t idle or be able to go into gear. I feel like you would be very good explaining how you get to the point where you have a running engine.

[@HeadFlowInc]

I’ve become a believer in the 4.8’s much stronger Rod/Stroke ratio, believing it can handle more power. Ratio 1.92-1 I’m building a Big Bore 4.8: 6.0 block and pistons with 4.8 Crankshaft and Rods. 333 CID Hello 8000 rpms and 24# boost!

[@thatgreenrcsb]

That's a goal of mine. Back in my mustang days I'd rather have a 331 vs. a 347 based 302 becaus it has the favorable r2s ratio. Planning on a 6.2/4.8 crank setup at some point. May swap out the 6.0 in my RCSB for it.

[@steelervette]

Interesting 🤔

[@steelervette]

What are you putting that its purpose? I bet that'll sound crazy in the revs

[@richardholdener1727]

the 4.8l crank with 6.0l bore will just make less power than the standard stroke

[@HeadFlowInc]

@@richardholdener1727 Strength, I can easily make 500+ HP w/333 CID crankshaft then ADD 15# Boost now I’m at 1000+ HP all day long. 1.92-1 R/S beats a 1.68-1 all day in endurance and longevity. Bonus: If you’re interested in No Prep or Street racing it’s a lot easier to get a shorter stroke down the road. Bets anyone? 😉

[@erichoward8463]

I just did both. Built a 383 stroker LS, then added boost..😁👍🏻

[@elyeti2094]

Results

[@corbinschad1]

Still really want to see some vvt stuff. Particularly stock vvt vs higher lift vvt with limited phaser movement. Thanks

[@orangetruckman]

I thoroughly enjoy your videos and this is no different 🤗 You ever think about writing a book on engine combos and power output. I think that could be a seller for folks 💁🏼‍♂️

[@richardholdener1727]

I have written 10 books

[@mdoe8]

I know the answer going in, but n/a is so cool though!

[@bdugle1]

That 600 hp 383 is really nice, but I bet it’s $8000 to duplicate it. If you have a Gen IV long block, say an L33, you could bore it to 5.7 for $1000+/-. Granted an L33 is the most expensive 5.3, but it’s way short of the built stroker and has slightly better stock heads. Or just leave it at an iron block 5.3L and save some more. Add a turbo using truck manifolds and a cam-four digit power potential for way less $$.

[@S4Meow]

Great comparison

[@bigbub54f100]

I have a 2013 Yukon Denali 2nd and blew up the trans towing and now I want some tips on getting more reliable power out of the 6.2 and a torque converter to match

[@FastFoxx82]

I would have set the boost controller for 13.7, one psi more to crest the 600 hp mark, 4.8 way to go for economy amd performance

[@OsomCrosby]

2:49 Richard having a horsepower-gasm

[@TheFoxygrandpa69]

I'm all about cheap power. But maybe you could talk abt reliability more. I think a lot of us want these engines as a daily. I'm guessing the 383 would last longer and be more reliable than the junkyard 4.8 But I'm just guessing.

[@cre8tivegarage157]

Learned alot from this video 👏🏾

[@russellrothenburg9138]

hey Richard, how about some twin charging on a 4.8. roots plus turbo. im looking into boosting my yukon 4.8 and adding a btr truck norris cam

[@Prestiged_peck]

Yes we need to get some info on how different power adders interact with each other when run simultaneously, I know there's some wierd interplay between twin screws and twin charging.

[@richardholdener1727]

there is no weird interaction-its just boost

[@chaze1385]

I'm having an ongoing disagreement with a good friend. He has a 91 Corvette ZR1 with the quad cam Mercury motor. They believe it's the greatest thing in the world. It's a very expensive overly complicated engine that uses very antiquated fuel injection compared to today. He's purchased a spare intake manifold that he's going to Port and polish. And adding long tube headers. He believes he's going to have this huge power gain! No ECU tuning and no other changes. I keep trying to tell him that he's probably just going to ruin a very expensive intake manifold and gain nothing. Not without other changes for compression boost nitrous something. Please help me settle this argument!

[@johnwehunt4305]

It's owning an American made GM quad cam. Not a lot of power today, but in that day impressive.

[@rifleman7313]

I think that you have already tested this however I cannot seem to find it but I was wondering how a S475 turbo on a 4.8L LS would compare to a 383 Stroker. Would simply switching from a GT45 turbo to an S475 turbo change the hp/tq closer to what a 383 stroker. I think that it would have to bigger turbo etc. However I cannot say for sure and what possible pitfalls would come with switching from a GT45 to a S475. Thanks

[@richardholdener1727]

the S475 is capable of supporting near 1000 hp, the GT45 is closer to 750 hp. They will do this on either motor, the smaller turbo will offer better boost response (same for the bigger motor)

[@rushweaver2807]

I feel that I trust the 383 to last longer more than the junkyard boosted one. But it sure does look easy

[@edgrippi484]

What can be had from an lh6 5.3? 07 to 08 Silverado. Mine has 347,000 miles on it. Dod deleted. Looking for towing capacity i.e. torque.

[@auskilluminati333]

I saw that sneaky engine sound @2:52 lol what the hell lol naaaannng naaaannng

[@timearll266]

I'm just thinking about how much it would cost to build a600hp na motor compared to just adding boost.

[@mikekopisz1227]

Depending on where you wanna make that power @ on an N.A.. 600 @ the crank...mehhhh,not that expensive 600@ the wheels? Break out the fuckin check book,credit card,cash in your 401k,clean out all of the bank accounts, possibly get into pimping..cause it'll get expensive quick .lol.. Going force induction? Honestly can make big power for only a couple grand... BUT...an N/A will definitely have better bottom end torque,vs turbos,just due to spool delay/lag...shit,my 3.5 EcoBoost doesn't start really spooling hard,till about 2500..but once they light up,she's gone...they both have their pros and cons...I'd personally like to see a build video myself,just to see the same cosr vs cost as you're mentioning

[@sean5comet]

600hp na will be 12k

[@timothythomas1737]

Both

[@Brock_Landers]

I'd STILL love to get a 67 Chevelle and drop a forged and stroked 383 into it and either add boost or a 3 stage nitrous kit to it with multi-port fuel injection with a Holley EFI engine management system.

[@jorgepopo3273]

I Will do 383 ls 4.8l Stroker With Garrett GTX 5533R gen2 turbo charger.

[@trentdawg2832]

I have a lr4 with a 220/220 cam , upgraded springs and hardened pushrods with stock 862 heads, thing is a beast with a 3000 stall converter and mild built th350....revs to 7500rpm all day long, I had it in my nova until I put a lsa supercharged 370 " lq9 with ls3 heads in it, now the 4.8 lives in my '73 c10 short bed and has no problem doing rolling burnouts with ease. ....I'm on the fence of adding a cheap turbo kit just for shits and giggles. .......but honestly it does its job just fine as is!!!......still trying to recoup and dial in the lsa supercharged nova and get the terminator x tune dialed in better before I dive into a turbo build, plus my wife would probably have a cow if she seen me dumping more money on something that is perfectly fine!!!!........I guess if I want to ride turbo my lmm duramax will have to do, a h&s minimax tuner wakes that beast right up!!!

[@richardholdener1727]

7500 RPM WITH A 220 CAM AND TRUCK INTAKE-THAT'S A GOOD 1200 RPM PAST THE POWER PEAK

[@charliedee9276]

Jeep 4.7. Not interested in big hp, would like a low boost torque in midrange application.

[@richardholdener1727]

GT45 TURBO

[@charliedee9276]

@@richardholdener1727 Thanks, that is what I was thinking.

[@derekv275]

Both😃

[@lrick3766]

It’s hard to beat the torque of a turbo, but is there a CARB legal one for California?

[@richardholdener1727]

not that I know of

[@dutnu2339]

So iv been looking around on the channel rich and I can't find a video on stock ls truck rods and how much they can handle till they break

[@richardholdener1727]

we've made 1543 hp and 1330 lb-ft with stock rods-is that enough?

[@dutnu2339]

@@richardholdener1727 that is plenty rich thank you can the stock pistons handle this as well with .028 gap ?

[@ttx888]

Is Crane out of Business??? Who can tell me where I can get Informations about this Cams????

[@gothicpagan.666]

There's no replacement for replacement

[@Ryan_Tinney]

Love it!

[@blackout7028]

you said you used 6.125 rods with a 4 inch crank? Is the pin height higher in the piston?

[@richardholdener1727]

yes-it was a custom piston to work with that combination-very common

[@joegreen4089]

1.4 Ft*Lbs per Cu Inch is very impressive. Do you think with a hotter cam and better springs and the same Heads and Intake as the 550 HP 383 you would have been able to make near 550 HP near 7500 RPM or would that have been beyond the RPM limits of the rotating assembly ?

[@richardholdener1727]

THE HEADS ON THE 550-HP VERSION WILL SUPPORT A HIGHER PWER LEVEL

[@Yoder52]

Please the Tacoma 4.0 next

[@Prestiged_peck]

He doesn't have anything available to run that in factory trim, he's have to lock the VVT, and either way he doesn't have the right bellhousing adapters.

[@kellyheath8547]

Displacement helps compensate for low octane. A 91/92/93 octane build NA 383 will rock pretty good and probably won't get beat too bad by a 91/92/93 octane tune turbo 4.8

[@Prestiged_peck]

Plus out on the street with no cool-down the turbo guy will suffer.

[@Carado5150]

Lol what

[@SonicRacingEPt]

Bet You haven't tested a Toyota 5e-fe on boost 🤔🤣😜🤪😂?? Good comparison on this...

[@hastenmccoy6687]

I am running two GT 45 turbos on a 6.0 L Chevy motor is two 60 mm waste gates to big ?

[@richardholdener1727]

no such thing as too big

[@pragmatist911]

When you raise boost do you need to retune every time?

[@richardholdener1727]

YES-WE HAVE THE MAP TUNED-SO WITH EACH NEW BOOST LEVEL, THE TIMING AND AF ARE CORRECT

[@bwhartman1]

Would love to build a 383 with the lm7 I have but for torque more than HP. Curious how that would work

[@Carado5150]

A small camshaft.

[@Paulster2]

If you want torque, you can get it one of two ways: turbo or displacement. Build a 383 with truck parts (intake, BTR truck cam, etc) and you'll make the low end torque. You can't do that as well with an LM7 without boost.

[@BoHorror]

What about stroker and boost, now there's another video idea

[@richardholdener1727]

lots of those tests

[@blainesnider9089]

Only draw back to boost is weight on the front end of the car.

[@Mastermindyoung14]

Put it in the back then

[@blainesnider9089]

@@Mastermindyoung14 not exactly efficient that way and doesn't fit on every car.

[@blainesnider9089]

@Goes 2 Eleven not just talking quarter mile. Talking autocross

[@blainesnider9089]

@Paul Schwartz a highly modded GTA. And any spirited driving it adds weigh in the front for mountain running or road course. I still use mine to do mountain driving with the family too! Just makes the car unbalanced unless you completely make the car not useful except racing. I don't run a turbo that is the point of what I said.By the way don't be a d...k

[@lauriec9039]

I've yet to see a 427+ cubic inch sbc on this channel

[@richardholdener1727]

I think I have run one of those-it just takes an after market block and a lot of work to get the rods not to hit the cam

[@tonkatoytruck]

Any guess on HP on the 383 stroker on E85 and 13:1 compression?

[@richardholdener1727]

what heads, what cam, what intake etc...?

[@tonkatoytruck]

@@richardholdener1727 Same engine that did 603hp

[@tonkatoytruck]

@@richardholdener1727 I am guessing around 650hp

[@kellyheath8547]

but dollars per HP. turbo beats almost everything.

[@Prestiged_peck]

Until you're fuel limited, then the turbo is just flat limited in a way a stroker won't be.

[@elyeti2094]

What if you added 6psi to the 383??

[@richardholdener1727]

it adds power

[@elyeti2094]

But would it add an additional 200hp on top of what the 383 does already?? I'm just curious that's all. Bang for your buck option is probably leaning more onto the turbo alone.

[@richardholdener1727]

it will increase the na power of the motor by 40-41% if everything is right.

[@tunerdadtunerdad7927]

If you took the 383 and the turbo 4.8 and they were in identical street cars...the 383 would run and hide from that 4.8 in anything other than a 80 roll.

[@richardholdener1727]

the na 383 would lose by bus lengths (about 100 hp or more worth)

[@tunerdadtunerdad7927]

@@richardholdener1727 nah...The N/A guy dont sit and wait for the 4.8 guy with the lazy gt45 to spoil. By the way, I have a turbo 4.8, but not 130 degree temps with no acc....and perfect conditions under the hood.

[@Slowv8Fiero]

@@tunerdadtunerdad7927 why coulsnt the 4.8 turbo brake boost from a roll? Or have a two step if from a dig? No waiting for boost needed. 383 would get worked!

[@tunerdadtunerdad7927]

@@Slowv8Fiero ...Lol... My bad. What was as I thinking? Absolute BEST case scenario dyno numbers rule all....

[@Slowv8Fiero]

@@tunerdadtunerdad7927 absolute best case 383 dyno numbers too then right? You think everyone is gonna make 600hp? Lol. Thanks for pointing out the best case numbers. Epic backfire

[@justinharris4718]

Big bang stroker LS series on the way ?? Anyone

[@richardholdener1727]

BIG BANG IS FOR STOCK MOTORS

[@averageamerican323]

Compounds again

[@unclesquirrel6951]

Personally I blame squirrels

[@danieldeweese8749]

What's the most boost you've made with the summit s475 turbo? How would twin s475s run on these motors? @richardholdener

[@richardholdener1727]

a single s475 from Summit will support 1000 hp or so

[@danieldeweese8749]

@@richardholdener1727 in your opinion do you think maybe 1500 or so from two of them?

[@aaronliddell4280]

@@danieldeweese8749 if 1 is good for 1K hp then the really crazy math shows that 2 is good to about 2K hp.

[@danieldeweese8749]

@Aaron Liddell. Sometimes it doesn't work out that way. Would that mean that if one turbo can put out 15 psi then 2 can put out 30? Or one puts out 30 then 2 can put out 60 psi? I genuinely don't know the answer. I've never boosted something with 60psi before so I wouldn't know.

[@aaronliddell4280]

@@danieldeweese8749 A turbos hp rating is based off how much volume of air it can move, not how much boost. Boost is only a measurement of restriction.

[@Ismcoyote12]

I wish you’d do more coyote stuff

[@bgee461]

Sure there is lots of that around, this is more junkyard and other guys kinda stuff which we love 👍👍

[@NickEdtk]

You’re the only person who wants coyote stuff 🤣

[@Ismcoyote12]

@@bgee461 I know but it’s nice to see more actual testing on all engine platforms , helps make part decisions easier . Richard has done a lot to help with Ls stuff and done some coyote but more would be nice

[@richardholdener1727]

I WOULD LIKE TO DO MORE COYOTE STUFF TOO-THEY ARE AMAZING

[@bill2178]

Im very confused why would anyone spend the money to build a stroker and start with less than a 4 in bore

[@MegaMustangkiller]

For some people with older ls cars the 3.898 bore ls1/6 blocks came in their cars so could be to save money there

[@richardholdener1727]

cuz the 4.8/5.3L is everywhere in the wrecking yard-the 6.0l can't be found

[@genemounce8302]

More n more I wanna sell my gen 3 6.0 block and gen 4 goodies just to see how far I can push a $500 4.8 LOL

[@Prestiged_peck]

Getcha a gen 4 4.8 lol

[@richardholdener1727]

do it to the 6.0L-it will be better

[@chaze1385]

I'm having an ongoing disagreement with a good friend. He has a 91 Corvette ZR1 with the quad cam Mercury motor. They believe it's the greatest thing in the world. It's a very expensive overly complicated engine that uses very antiquated fuel injection compared to today. He's purchased a spare intake manifold that he's going to Port and polish. And adding long tube headers. He believes he's going to have this huge power gain! No ECU tuning and no other changes. I keep trying to tell him that he's probably just going to ruin a very expensive intake manifold and gain nothing. Not without other changes for compression boost nitrous something. Please help me settle this argument!

[@Mastermindyoung14]

Just remind your friend that she/he doesn't know more about intake designs than lotus engineers.

[@richardholdener1727]

he won't get huge gains-the guy at Pacific Performance did the ZR1 motor back in the day-he needs head porting and cams

[@bgee461]

@@richardholdener1727 he said 32 valve mercury engine, so likely the 4.6 marauder? Not sure why anyone would put that in a zr1, but it's a cool engine.

[@Mastermindyoung14]

@@bgee461 no. The ZR1 engine was a quad cam.

[@bgee461]

@@Mastermindyoung14 he said mercury though?