LS-1 383 build opinions?
Thread Starter
Registered User
Joined: Feb 2011
Posts: 14
Likes: 0
From: Mobile, Al
LS-1 383 build opinions? I have been thinking of doing a stroker motor with my LS-1. I have been told that it is a waste of money because of the bore. I am building carb setup for this engine. Any opinions would be greatly appreciated.
TECH Regular
Joined: Aug 2010
Posts: 462
Likes: 0
From: houston, texas
i have one and it makes really good power. i know with a better tune i would be a lot closer to the 500rwhp mark. if you dont wanna buy a block its the only way to go IMO. there's a few guys that have 4.100 inch stroke crank making theirs 396's. i think the wrist pin starts getting into the ring lands though. PM me if you have any questions about my set up.
9 Second Club
Joined: Aug 2008
Posts: 463
Likes: 0
I ran one for a year. Best time was 10.42. That was with afr 225's, vic jr intake, 750 dp carb and a decent size cam 4.11 gears. A friend of mine had a little more suspension on his car and it was a little lighter. He was running a 346, stock heads, stock block, fast intake and a big cam. His best time was 10.38. I had 85 more cfm 37 more cu. in. and was slower. both had the same gearing and similar stall. I pulled one more mph then him. They have a lot of piston scuff.
not a waste but i would rather build a 370 6.0l with forged rods and pistons and invest the money saved on the crank on a better set of heads that will utilize the 4" bore. It should walk on the 383 and have more room to grow.
TECH Regular
Joined: Aug 2010
Posts: 462
Likes: 0
From: houston, texas
i just did a quick search and found a few threads on this. search for 396 or 396 ls1. i had put an engine in my buddies truck that he sucked full of water. if one of the rods hadnt hit the block just above the oil filter i would probably have a 402 now. but i enjoy my 383. just saving some money to spray the **** outta it.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote Which one you guys will recommend?
346cid with aftermarket high flow head; or
383cid with stock casting port head.
Both equip with same mild cam like a 224R and FAST 90/90
346cid with aftermarket high flow head; or
383cid with stock casting port head.
Both equip with same mild cam like a 224R and FAST 90/90
9 Second Club
Joined: Aug 2008
Posts: 463
Likes: 0
Launching!
iTrader: (5)
Joined: Dec 2009
Posts: 218
Likes: 0
From: Kunduz, Afghanistan/Monteagle, Tennessee
http://www.youtube.com/watch?v=ybLWhGwSGBY
Last edited by geoffreymexico; May 11, 2011 at 10:24 AM.
Tony @ AFR has/had a good example of a well built 383ci LS1 in his C5 Vette that, if I remember correctly, made close to 600whp on pump gas.
Also, I know its apples to oranges, but there is a 3.950" bore late model HEMI that just recently made over 700bhp with a 4.250" stroke crank in the EMC, and I think that was accomplished while turning under 6500 RPM or so.
I have the 224R, untouched FAST 90/90, and untouched AFR 205's that i bought used for a reasonable price. This is untuned so im not sure on the hp. I would guess around 430rwhp, but like I said that is just a guess. And fwiw I have managed to have more than enough fun with my setup. Maybe this will help with your decision.
My friend keep telling me go with a 383 stroke with my build instead of just a forged 346.
Launching!
iTrader: (5)
Joined: Dec 2009
Posts: 218
Likes: 0
From: Kunduz, Afghanistan/Monteagle, Tennessee
I had every intention of keeping the original block and doing a forged 383 build, but I have decided to go with a little more displacement in my plans when I get back from Afghanistan.
Any of the newer pistons with coatings are going to help with the scuff of the longer stroke. My 383 looked great at its 10k teardown running Wiesco coated pistons @ 488whp. The key here is getting your piston to wall clearence nice and tight to keep the pistons from rocking as much. Having the motor set up @ zero deck or .005 out of the hole will keep the scuff to a min as well. I wouldn't trade the extra torque I'm making now vs my old stock displacement setup for anything.
I'm at the point now where I'm strongly considering a rebuild. I'm trying to decide between building my own motor using the stock block and doing a 383 or buying 402 off one of the vendors. If there is a good cost savings by building it myself then I'll go that route. Plus, I've always wanted to build my own motor.
