Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Net gains from stroking motor

Thread Tools
 
Search this Thread
 
Old Dec 12, 2008 | 02:49 AM
  #1  
350pride's Avatar
Thread Starter
Teching In
 
Joined: Oct 2008
Posts: 49
Likes: 0
Default Net gains from stroking motor

Right now I have an ls1 with 230/234 cam on a 112 lsa and stage 2.5 ls6 heads. How much hp and tq would I gain from stroking the car to: 364, 383,408, or 427?

Thanks,

Pride
Reply
Old Dec 12, 2008 | 06:40 AM
  #2  
slow trap's Avatar
TECH Addict
iTrader: (22)
 
Joined: Sep 2004
Posts: 2,639
Likes: 0
From: tennessee
Default

with the stock ls1 motor you have with the 3.898-3.903 bore and a 4.0" stroke crank it will be a 383 and you probably won't gain alot of hp but you'll gain quite a bit of torque. just guessing i'd say 15-25 hp and 40-50 ftlbs torque. there are so many variables it is hard to get an actual accurate gain. with an lq9 or ls2 block with a 4"-4.03 "bore and 4" stroke it is a 402 or a 408 . with that many cubes your h/c setup would need to be upgraded to take advantage of the extra cubes imo.
Reply
Old Dec 12, 2008 | 09:04 AM
  #3  
BlackScreaminMachine's Avatar
Internet Mechanic
20 Year Member
iTrader: (17)
 
Joined: May 2005
Posts: 9,830
Likes: 2
From: Wallingford CT
Default

Originally Posted by slow trap
with that many cubes your h/c setup would need to be upgraded to take advantage of the extra cubes imo.

Agreed

I used to run stroked LTx stuff before Lloyd Elliot came out with impressive h/c packages and to be honest a stoker is only as good as the topend. Small cames for a 350/346 cid motor get swallowed up by the demaned for longer valve timing events.

I had a 383 for what it is, worked but realized that compared to even examples today would have to run a serious cam w/ cyl heads to match. Not to mention all the bolt ons and free flowing intake and exhaust.
Reply




All times are GMT -5. The time now is 10:19 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE