When going from 91oct to 93oct, what would be a good increase in timing to go with? I was thinking about 2 to 3 degrees for starters. Is there a general equation out there somewhere for general timing/octane ratio?

 

leave the timing alone and up the boost

 

+1

 

how do you know he is boosted

 

if he isnt then he really needs to up the boost

 

by about 15psi min

 

this car is not boosted yet. i just moved back across the country so there is no money left for that.

 

If your goal is to make more power, then look else where, increasing octane and advancing timing on a stock low compression engine will do virtually nothing.

 

ive got a 11.5:1 ls/vtec on a 100 shot wet nitrous. its pretty well built. i just got back from a 2100 mile road trip with it.

 

Running PR3 pistons or aftermarket?

I've got a high compression LS/Vtec too and had both. I actually like the PR3s better than my SRPs.