Private51

iTrader: (2)

Just wondering how my STI's improve by putting race gas and where I can get it?.>

I've heard theres one gas station here in hawaii with 104 octane.....I think its 76 station in honolulu...but I dont know exactly.....does anybody knows???..

04sleeper

iTrader: (9)

it helps a little. the 76 on king has 100 octane but i don't think they have 104.

JT-Sti2

Ahhemm, I wouldnt put race gas on an otherwise stock STi, without being able to adjust A/F Ratio...and/or boost psi. Take it from me, Ive done it myself...I was running 13.3-13.4s ...bone stock on pump gas!, when I ran 100 octane , I ended up running 13.6-13.7s along with a 3mph loss in trap speed! Higher octane = more difficult to burn, but has more BTUs...a stock STi already runs too rich! I ran my Blue STi last week ....12.80, 12.87, 12.87 @ 106mph on 93 octane pump gas tune! I had bad 60ft times (1.8) because it drizzled a little, remember.

Mach5WRX

iTrader: (9)

I guess I'll add my $.02

There is at lest 3 Sti (me being one of them) and 3 WRX HIIC owners w/ VERY lightly mod'ed or stock cars... that have ran better 1/4mile time and trap speeds by just using 100oct.


http://www.turbocalculator.com/turbo-works.html

Using 100oct will help fight predetonation which in turn...will make your ECM and use the aggressive map = you go fastAr.


But I've been out of the "Game" for a while...I may be wrong.

v rod

yup!

JT-Sti2

Well, mixed reviews....so its up to you to do what you think. Maybe I just ended up with a bad batch? at the time....perhaps? Or I just dunno what Im talking about, cause I can only run 12.65-12.8s on pump gas, and 12.5-12.6 on 100octane w/ a RACE GAS MAP on my piggyback ECU + downpipe, thats all....

acarguy

iTrader: (2)

Maybe octane has less of an effect on later STIs (those not in the first couple batches like ours). I'm sure the benefit is only up to a certain point too. You probably wouldnt see a difference between running 95 and 100 on a stock STI. But I can definitely tell a difference when running 92 and a 93-94 mix. A bit higher octance = no det = no timing pulled = smoother pull through power band

silver satin

iTrader: (7)

Mach5 and a few others including me have the first batch that had the detenation problems so maybe the higher octane gas made a difference or OH god could it be a good driver behind the wheel who knows...And honestly if your into drag racing there are better cars than a Subaru the last thing a AWD car was made for was drag racing...

Private51

iTrader: (2)

heh..thanks for the info on finding that pump gas at king st. 76......Now, I'd have a question on where I can buy 93 octane here in oahu??///

keirnna

iTrader: (8)

There is no 93 on Oahu.

Private51

iTrader: (2)

can I make 93 by just adding a bottle of octane booster??/

sykosis

iTrader: (23)

You can make 93 or even 94 octane by mixing a little 100 in with the 92.

This is what I do to run a 93 octane map, I basically mix 3 gals of 100 and 7-8 gals of 92 to make 94 octane (just to be safe). But I agree with it being meaningless on a stock boost car.

sykosis

iTrader: (23)

I would also recommend doing a search on octane additives. Alot of old skoolers in HIIC have user xylene or toulene as additives, staying away from bottled octane boosters. I myself have never done this since the station with the race gas is a mile from my house.

gpatmac

iTrader: (3)

I'd be among that group.

My $.02.

-What slows your car down? Pulled timing or too much fuel.

-What normally causes those two conditions? Knock makes a stock ECU divert to a lower ignition advance multiplier, ie it defaults to a lesser aggressive map.
I can't think of a condition where the stock ECU forces the mixture to be TOO rich. Many aftermarket ECU's/piggybacks come with pig rich fuel maps, but that's an existing condition not a reflexive condition like pulled timing.

-What effects do racegas have on an engine? More resistance to pre-ignition. Burns hotter.

I have never heard of any cases of misfire due to the use of race gas. I can't think of any reason at all as to why race gas would slow any car down.

tru

you can get 114 at waipahu 76 but you gotta buy them by the 5 gallon containers for $45 i think