100 octane question

[greenmachine]

When i go out cruising the freeways looking for races in Minneapolis/St. Paul, i usually stop at a gas station that sells 100 octane and fill er up. My question is, how much safer is it to run higher boost on? What would be ok to turn it up to on the stock T-25, and what on a bigger turbo like a Big28? Fuel pump is good, stock injectors.

 

[nineD5_GS-T]

Reguardless of what fuel that you throw in your car, the t-25 is garbage. It just cannot flow enough air. On the big28 with 100 octane and fuel pump you could do 19 psi safely. With a logger and afc, 20-21 would be ok too, just make sure that you dont heat soak.