boostedb20ek

if i bored stock gsr sleeves to 84mm, how reliable will the stock sleeves under boost? it is a gsr with built b16 head, i have 84mm forged pistons that i am wondering if i should put in or just buy more for stock sleeve size for more boost. what do u guys think??? thanks

ROMEO856

no...it will break, thats like having glass cylinder walls

buy a sleeved block... or sell those pistons and get smaller 1's

Schister66

I dont think you'll even have any metal left at 84mm on stock sleeves...even 82mm stock sleeves are weak on boost.

bigb16

Bore it to 81.5mm just to clean up the sleeves a bit, while still retaining most of the cylinder wall support. Block guard is also a good thing to throw in.

boostedb20ek

yea, about that, i had a new ge sleeved block but had to sell plan to get another but not for a year or so. didntknow the difference in the gsr n b20 sleeves cuz i had a boosted b20. thanks

boostedb20ek

n ill prolly go wit bigb16 and resurface cylinder walls with some slightly larger forged pistons. thanks guys