Hey guys/gals

Im in the middle of doing a rebuild on my gsr and i have decided to go with a better build over stock. I am not going all out but im looking at getting a set of eagle h beams and a set of cp 9:1 pistons. I am going to get a bigger turbo (i have a .54 trim right now) so i can reach for higher HP numbers. My question is how much power can a put to my stock sleeves safely? i have seen 500whp builds on stock sleeves so im thinking ill be ok since i wont be making as much power more then likely, shooting for around 450whp till i can build my head. my block is bored .020 over stock.
Thanks for the input.

 

you answered your own question but yes 500whp is a safe amoutn of power to still have longevity. they can be pushed to 700+whp but they dont last thats for sure. and even at 500whp it takes a really good tune to last. you can crack a stock sleeve at 200whp if its not tuned properly. detonation is key word here and to stay away from it

 

I had always seen the builds and thought wow are they lucky or just running theor cars for a season and rebuilding? i have a tuner here locally who does great tuning (600+whp vitara on stock sleeves) so i feel safe there. just wanted some input.

 

After 500+whp is when it would be best to sleeve.