race gas??????

[gt350mustang]

what is the highest octane unleaded gas avaliable? where to buy? i think i have bought sunoco blue 104, or maybe it was 110.

[Shaggy]

Highest unleaded i have seen is 110 but that was exxon ivp only has 107 not sure what sunoco has though.

[maveRick]

check out: http://www.racegas.com/Racegas/fuelspecs/default.asp

I 'believe' the Cadalac convertors go outta whack with anything leaded - which may limit one to 104 octane.

Which begs the question I've asked the guys at LSRP, "why don't you guys carry 104 unleaded for street racers?"

I'd guess they don't carry it because it means the old fart would have to get up outta his chair to put it in.


I, uh, didn't have any cats on my '90 Stang (the dog ate em) so I ran the 110 - with much pleasure to me and my engine :D

R

[89 coupe]

Originally posted by maveRick
check out: http://www.racegas.com/Racegas/fuelspecs/default.asp

I'd guess they don't carry it because it means the old fart would have to get up outta his chair to put it in.


I, uh, didn't have any cats on my '90 Stang (the dog ate em) so I ran the 110 - with much pleasure to me and my engine :D

R

LMAO--He's pretty good about handing out the sign up sheets though.

Now on a more serious note. I don't know what compression you are running but on my car which has fuel injection and aluminum heads, 110 octane slows me down a couple MPH in the quarter.
I run the 104 or just plain old 93 supreme with a 150 shot of spray and have never burned a plug. My compression is about 9.5 to 1. I wish they sold the 104 too.

[gt350mustang]

martin, i have 9.0 to 1 comp with anywhere from 10 to 15 lbs of boost. probably closer to 10.

[maveRick]

11.25:1

[89 coupe]

For boost or over 11 to 1 the 110 octane probably works good for you. I did not know your combination's and was trying to save you a few bucks on fuel you might not have needed.
I guess on my car the combination of fuel injection, aluminum heads and compression atomize the fuel so well that the higher octane is not only unnecessary, but actually hurts performance. I tried two half tanks worth of 110 while re-tuning timing etc. and it just didn't work for me.
Guess I'm lucky. The 93 supreme is a little cheaper :D

[Bubstang]

Some of the hottest race gas out is low octane but is oxygenated. Just because it is high octane doesn't mean its better....

http://www.vpracingfuels.com/vp_10_techdata.html?mgiToken=D031D802BB115782E5#

[89 coupe]

So Robert which would you recommend for a combination like mine and is any available locally?
I would like to try out a little to see what happen's.

All I have ever tried is 104 unleaded, 110 leaded and pump gas.

[Bubstang]

I'm not sure. Call 281.449.8833 for Madman & Co Racing, they are a VP dealer on the Northside. They can coach you based on your setup. The web page is http://www.madmanandcoracing.com

Let me know what you end up with.

Later,