I had about 5 gallons left in my drum of VP that I use for snocross. Well I mixed it with about 5 gallons of 93 that was left in the tank. All I got to say is wow. Talk about waking up the motor. It feels like it added 20-30 hp without question. Give it a try if you have some handy

 

Unleaded of course?(!)....

Rush of Octane ....30$...Replace the O2sensors and CAT.priceless.

 

actually, you can make unleaded race gas for cheap. About $20 for 4 gallons of 99. all you have to do is put a gallon of xylene in your tank (paint thinner from any local paint store) with three gallons of 93 and drive. YES xylene is safe to put in your car. Its actually an ingrediant in gas. YES its o2 friendly and YES you will love it. It also makes a great injector cleaner (although i dont think you guys have to worry about that yet )

 

really? i might have to try that for drag wars this weekend.

 

yup. ive used it a few times, but i dont really need it being NA and all. In the San Antonio Grand Prix club im in, all the members use it when we go to the track. Works like a charm.

 

How much will the race gas help in the quarter mile.

 

if youre going to run race gas, youll want to run as little regular gas and as much race gas as possible. Youre just going to be diluting the race gas by running regular gas with it. If youre talking about the xylene mix, 3 gallons of 93 + 1 gallon of xylene.

 

How will race gas help? Especially since you can not raise the boost yet. Would it only help if you are running low octane and getting slight deto. Or if you are running a smaller pulley and no ECU tuning?
Whats the recommended octane for the SS/SC anyway.
Not disputing, just asking!

 

How it burns, the higher octane the bigger the bang inside the engine, creating more horsepower!

 

No, . God where do some of you people get your info?

It's still gasoline, there's no more energy contained in it than any other gasoline. It just has more octane, making it less prone to detonation. This DOES NOT INFUSE THE GAS WITH MORE ENGERGY. It just means it takes a higher temperature and compression in order to detonate it. I highly doubt race gas will see any advantage over, say, 94 octane premium. If that were the case then it would be TERRIBLY retarding the timing of the engine with regular 91 gas, and the engineers wouldnt have designed the engine to take advantage of race fuel.

 

I gotta say hope your like 12-13.1 compression or ya guys are just gonna hurt the performance "Big Time". Maybe if your running about 18-20lbs of boost a higher octane would be needed.

 

THANK YOU FOR SHOWING UP!!!

This guy is right, he knows his stuff.

 

Oh boy another canadian

 

ha ha ha soon we will be everywhere, and take over the world with our niceness lmao

 

nice exaggeration

higher octane is only needed when you get knock. I hope you know that stock GP GT's get upwards of 7-8* of KR STOCK. 9.5 compression. Its mostly due to running lean with the stock pcm, but you dont need insanely high compression or extremely high boost to need race gas. Running race gas would also allow a smaller pulley than normal (as the GTP guys do all the time) which allows more HP. But i do agree, unless youre getting knock with 93, you shouldnt use race gas. I was just responding to when and how much race gas you should use, not condoning it.

 

I was referring to the 1st post...running 99 octance with stock timing and boost IN A COBALT SS "I think i'am in the cobalt forum,looks around" is a waste of money was what i was saying. It will actuallly slow you down in a 1/4 mile run.

 

I know it doesn't increase the performance, but how will it slow you down? Its still gasoline and using higher octane fuel never slows anything down, its just not worth the money for no power increase. Unless the ECU retards or advances the timming the gas type makes no difference in performance, assuming your not detonating.

I know that running 87 or 89 octane will hurt your performance as the ECU will back off the timming to avoid knock.

 

Too much octane will also slow the car down. That's why there's three basic levels at most gas pumps. You already know that if you put too little octane you will lose power and detonate, but did you know that you will also lose power if you put in too high an octane. The burn rate is incorrect, and while you will not detonate, you will not burn the fuel as efficiently. You'll get less mileage and have less power. So that's why I said not to use 99+ octane!

 

Race gas will help, exp. on those hot days at the track....... even being aftercooled, your intake charges are going to be hot, and prone to detonation......... higher octane, less knock, less timing retard, higher HP:boost ratio.

this of course is for the BOOSTED cars, not the N/A (unless your getting knock, which the EcoTecs have been known to get)

93 is the highest you can get, in most places, at the pump. This doesn't mean its the highest you should use.

If someone has some extra time and money........ head to the dyno. Make a few passes with the 93 octane.......... then with some 100 or 110....... boosted cars (EXP S/C ones) LOVE higher octane.