I was wondering how safe it would be to bore a GSR Block out to 81.5. my goals are just around 400- 450 MAX..
Superdave is my tuner of choice so its a good tuner.
E85 is the fuel
SC61 is the turbo of choice.
Just a weekend car. Not beating on it all the time. just want Low 11's or high 10's on slicks.

 

You'll be fine

 

anyone else?

 

i'm doing almost the exact same build as you right now... you'll be fine... hopefully.. lol

 

I love these kinds of threads. Look around, there are lots of us running bored blocks...

 

you're ok just dont go past that..82mm would b too thin. or you could sleve it if u had money.

 

505WHP 360ft pounds tq @ 22 psi via Garrett GT35R.

81.5mm Stock Sleeve b18c1 bottem end. Using Wiseco Pistons/Eagle Rod combo!

Pump gas, Sunoco 94!

I love it!

 

Same here. Im doing the same as you. You will be safe.

 

I dont feel like finding the dyno graph at the moment, but i know SLS built a simple 9:1 piston/rod combo on the white hatch, made 452whp and then ran in the mid 10s with it....all on stock sleeves