"Race fuel" in a 5.0 ???

[dls322]

Hello everyone,
I'm heading over to maple grove speedway after work. There is a local gas station that sells VP race fuel. Would i see any gains by running some of this through my car. I was thinking about running half a tank of 93 then put in 2 or 3 gallons of the VP race fuel. Am I just wasting money or will i see any type of gain. I also have no desire to screw up my engine. Any info you guys have will be greatly appreciated. Racing starts at 5-10 so stop on by!

Thanks,

Dave

 

[88POSLX]

Waste of money. I don't even know why you bother with the 93 octane.

 

[dls322]

You mean my car will run just as fine with 87?

 

[TRWXXA]

You mean my car will run just as fine with 87?

This was discussed in another thread a few days back. You will want to run the lowest octane rating you can without pinging at WOT. Higher octane will actually reduce your performance.

If you have a stock motor 87 will be just fine, although older motors with a lot of deposits in the combustion chamber, or a fouled up MAF, may need a higher octane to keep from pinging.

 

[illwood]

Unless you're planning on advancing your timing, the higher octane fuel will do nothing except drain you of $$.

 

[sunil6784]

Race fuel is just REALLY high octane. You have no need for it, its meant for race engines with intense compression.

 

[jimilane]

115 octane knocked .2 tenths of a second off my quarter mile time.

Spun more off the line and on the 1 2 shift.

You can feel it in the seat of the pants.

I had totally 115 octane in the tank.


I was running 87 before. I have no cats and a Vortech supercharger on that car.

I wouldn't recommend anything higher than what you can get at the regular gas station pumps unless you DON'T have cats. I have burned up two cats on one car, and one cat on another car running 115 in one and 100LL Avgas on the other.

Jim

 

[The Fox]

And that tells ya that you arent really even burning it all. I have a motto with buying mustangs AND gas. STAY BETWEEN 87 and 93!!! j/k but yeah don't get race gas. If you have aftermarket heads they usually suggest high octance levels. What's the middle 91? 89?

 

[Curse]

What's the middle 91? 89?

Depends on where you live. 91 octane is premium for me, 89 is mid-grade