[coop1103]

Noticeable that is. I am currently flashed on stage one with 91 ocatane. If I flash Stage 1 with 93 octance will i notice anything>???? Or should i just wait to go stage 2 till i flash it again?

[Hitman83]

you might notice some detonation and pulled timing but that's about it

...better yet try the 93oct HWG map for lots of fun

On a serious note it's not worth the risk and any gains will be marginal at best on a stage 1 map

[holycow]

You want to run a tune designed around the octain it was made for. You can run a 91 tune with 93 octane gas, but you don't want to run 91 octane gas with a 93 octane tune.

[Draco-REX]

Originally Posted by coop1103

Noticeable that is. I am currently flashed on stage one with 91 ocatane. If I flash Stage 1 with 93 octance will i notice anything>???? Or should i just wait to go stage 2 till i flash it again?

When I drove through PA, I could get 93 oct no problem. Why are you running the 91 map?

[coop1103]

Originally Posted by Draco-REX

When I drove through PA, I could get 93 oct no
problem. Why are you running the 91 map?

My normal gas station is WAWA which runs 92 octane.

[ninjaboy76]

Then run the 91 map to be on the safe side. For future reference though, there is quite a bit of difference between 91 and 93 as far as tuning and upgraded turbos is concerned.

[wdb]

Originally Posted by coop1103

My normal gas station is WAWA which runs 92 octane.

You have two choices:

1. Keep buying WAWA gas and run the 91 octane map
2. Do your fuel system a favor and buy better gas (Exxon, Sunoco 93, Shell, BP), and run the 93 octane map as a side benefit

[Templar]

Be thankful you don't have the misfortune of living with California gas! Paid $3.75 a gallon for some of the worst 91 octane in the country. Yea I have a fuel map for running this gas for the mods I have (Just north of stage 2 ) and some for 93 and higher when I want to do some track time or just go out and play. It just sucks paying so much for fuel that at it best can keep my car from detonating.

[kpnorton]

I have sadly not had the opportunity to run 93 pump gas, however I have been blending CA 91 w/a number of additives to simulate it as best as I can.

Simply stated, fuel makes a considerable difference. I have been running a variety of Stage 1 maps (OSECU) on both blended and unblended fuel. The best combo I have found is Toluene, MMT octane booster, and Chevron 91. The car is smoother from idle to 7K. It will also run more timimg w/o knocking. The verdict is out on power/torque b/c I have never dyno'd, but the the butt-dyno says it's worth it.

-KPN

[flatthump]

Noticeable? Ummm yeah. If you tune a STi on 93 then go to a state with 91oct. You'll see quite a big difference between the logs