What psi on 100 octance gas

[X|Crescens]

I was wondering for the people out there who use 100 octane gas, or have used 100 octane gas; what psi did you boost at? I was thinking of coverting to e85 and I was just wondering what people were boosting at safely with 100 octane. I also wanted to know, if they got a boost spike, what did it spike to? Thanks.

 

[1g_tsi_awd]

Well, if everything is stock as your profile says good luck running more than 16-18 psi efficiently on that t-25. Sure you won't experience knock if you crank it, but the turbo is well above it's effieciency rating.

 

[Savage Talon]

I can get 25lbs on my set up with no knock in the morning and little to no knock in the hot afternoon. But my frontmount is half the size it needs to be.
Edit: I also have 9-1 compression and at around 10 to 15deg of timing.

 

[HustlerTalon]

It just kinda depends on ## setup.

I could run up to like 28psi with 100 oct gas...but then again I have meth injection so that helps me to not knock even more.

 

[1g_tsi_awd]

Yea, but you are cancelling running 28psi out because the t-25 can't handle that efficiently...

 

[20MIRAGEGT]

It just kinda depends on ## setup.

I could run up to like 28psi with 100 oct gas...but then again I have meth injection so that helps me to not knock even more.

i dont see the point on runing 100 oct if your runing a meth kit.

on 100oct u should be able to run 25-27psi depending on your fmic setup.

 

[X|Crescens]

I'm sorry, I needed to list the mods to help with the answers that I'm acquiring. I have a garret GT28 turbo (its a small turbo) with 550 cc injectors, 255 fuel pump, rewired. FMIC, evo III o2 housing, downpipe and exhaust. I have a safc II and an inovative wideband. I hope that helps.

 

[silverbullett]

Even with 100 octane I won't push over 16 psi. I'm on stock fuel system so I don't want to push it. My car will only spike maybe 1 psi over what I set it to.

 

[pboglio]

I run 23-25 psi on 100 octane.

 

[dsm91TalonTSi]

i ran my evo3 16g at 18psi on 94 and it was good.. i dont know anywhere to get 100..