stock LS1 psi? 
stock LS1 psi?
Depends on what turbo super..pounds of boost are not pounds of boost.Airflow is the determiner of power. Big turbo at 10psi puts out way more power than small turbo at 10psi. But generally if you must have psi numbers run 5psi and be conservative with stock compression heads. If you put on say 317s and drop compression can possilby got to 8 or 10psi again with your basic smaller single turbo like sts starter turbo type of thing.
Make sure your tune is close to perfect in terms of afr and timing. Too lean or too much timing boom boom on the stock ringlands..rebuld time then for sure.
Be conservative and stock engine can last. Have pistons in my garage from people that had various little stock motor accidents. One guy took out his pistons at 8psi on ati. Other guy had little boo boo with his greddy boost control on his lt1 sts car. Both lost ringlands and had to rebuild motor. expensive mistakes.Stock pistons suck.
Make sure your tune is close to perfect in terms of afr and timing. Too lean or too much timing boom boom on the stock ringlands..rebuld time then for sure.
Be conservative and stock engine can last. Have pistons in my garage from people that had various little stock motor accidents. One guy took out his pistons at 8psi on ati. Other guy had little boo boo with his greddy boost control on his lt1 sts car. Both lost ringlands and had to rebuild motor. expensive mistakes.Stock pistons suck.
TECH Enthusiast
Joined: Jan 2004
Posts: 608
Likes: 0
From: New Zealand
I don't think a given boost psi is a cutoff point for engine longevity.
I'm sure you could kill an engine with zerrow boost if abused or badly tuned, and another may run 15 psi with a good tune and sensible driving and live a long and happy life.
Personnaly i think HP is probably a better measure, and consider 500 rwhp to be pretty reliable limit with good supporting mods,good fuel supply and a solid tune.
But plenty will push harder without to much drama in the knowledge that a forged rebuild could be in there future
I'm sure you could kill an engine with zerrow boost if abused or badly tuned, and another may run 15 psi with a good tune and sensible driving and live a long and happy life.
Personnaly i think HP is probably a better measure, and consider 500 rwhp to be pretty reliable limit with good supporting mods,good fuel supply and a solid tune.
But plenty will push harder without to much drama in the knowledge that a forged rebuild could be in there future
I know of one locally a few years ago that was on 14psi, made 630RWHP on a very conservative tune but popped pistons occasionally. The guy owned a shop so he would just replace the pistons and bead hone. The goal was max power boost on a stock bottom end. That being said, I wouldn't go over 10 on a stock bottom end, and I'd prefer 8psi.
Hey im just up the river from you a bit...But if you are talking super, I have a v1 vortech it put 12psi@6100=600rwhp on the stock bottom didnt blow anything but probably wouldnt last long. Ls2 403 in the works.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
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
I would say 7-10 is what most guys running depending on there set up on the stock pistons but you will see a few guys running a little more and a few making good power on a little less.
run 16# on the stock bottom end. TC76F1 turbo with 317's filling the slugs up top. i know it's going to blow up. it's nothing to be unexpected.... i'm just wondering when and if i'll have it on video
hey guys im about to buy 317's from the classified section and i was wondering what gasket would i use to lower compression? i plan on throwing on turbo kit on in a few months. i have a stock ls1 and i don't plan on putting a cam in at all when the turbo goes on. any info would be great. i don't know what these heads will drop my compression too
Keep in mind that unless the rest of the car is already set up... you will probably need work in other areas of the car even at "safe" HP levels like 500...
Rear, Trans, Suspension.... Its fun to see what HP you can make, but its not much good unless it can 60' and pull down a nice timeslip....
That is unless you are the Dyno queen type...
Rear, Trans, Suspension.... Its fun to see what HP you can make, but its not much good unless it can 60' and pull down a nice timeslip....
That is unless you are the Dyno queen type...
hey guys im about to buy 317's from the classified section and i was wondering what gasket would i use to lower compression? i plan on throwing on turbo kit on in a few months. i have a stock ls1 and i don't plan on putting a cam in at all when the turbo goes on. any info would be great. i don't know what these heads will drop my compression too
i have heard 9.5 and 9.8, so somewhere around there. you can try to find a compression calculator.
or unless you do lots of roll racing!!!
Yea i am running 317 heads with the GM MLS gaskets...
I have a very bad tune from a sponsor on here - it is set for 10 but it creeps to 11-12 psi and leans out viciously.
Even with that said and the occasional romp - its holding together just fine.
The only thing that has 'gone wrong' is an oil scavenge pump failing and 1 of the lifters ticks pretty hard now.
I have a very bad tune from a sponsor on here - it is set for 10 but it creeps to 11-12 psi and leans out viciously.
Even with that said and the occasional romp - its holding together just fine.
The only thing that has 'gone wrong' is an oil scavenge pump failing and 1 of the lifters ticks pretty hard now.
Yea has to be my cars fault - it not be the great tune when it goes 9.x:1 AFR when it hits boost and leans out to 12.9:1 a second later..
My purpose in posting that was not to bash the company - i was simply saying - our motors can handle a lot of abuse even with the psi around 10-12
