Dickdeandestructo

I was under the impression that my 10:1 compression could use no lower than 92. So I have been using store bought octane booster, and knowing that that is not going to cut it I am, for price and usefulness, I need other ideas. Atm ,I am planning on adding a gallon of tolulene or xylene. What do you guys think ?

flywheel

iTrader: (2)

Try the 91 and see how it does.

02ws.sik

You can use regular.

Dickdeandestructo

I think that 91 is fine for now , but once I finish start running 4lb of boost I don't think it is going to cut it.

97badass

iTrader: (8)

Best you can get here is 91 our 91 = 93 at s.l. your fine.

02ws.sik

Cant you get octane booster?

Dickdeandestructo

yeah , the best here gets it up to 91.7 Unless the **** at walmart called 104+ actaually takes it to 104.

02 NHRA

All I can get in my area is 91 since the only mom and pop with 93 closed. 91 has been doing fine with a basically stock engine.

chrysler kid

iTrader: (14)

Depending on the altitude where you live octane ratings change. Because the air density does not promote burn comparable to lower elevations fuel stations can not meet testing levels.

Easy way to tell is if your gas station only carries 86 octane instead of 87.

Long story short 91 is 93

Dickdeandestructo

That is good information. Looks like I have some research and learning to do on octane testing and rating.

Dickdeandestructo

Found a place right down the road that sells race gas.

02ws.sik

Whats that run a gallon?

Dickdeandestructo

I haven't caught them open yet but when I do I will let you know. I drive by there almost every day. This place looks nice, with a machine shop , welding shop and pumps advertising race and watercraft fuel.

02ws.sik

nice. what octane is race gas?

Dickdeandestructo

it is 65 for a 5 gallon pail of 109 unleaded. The cool part is that they are just a few miles from my house.

zanthor991

Ya. 91 is fine. I'm running 10.6:1 with only 91. 40* and no knock whatsoever. But in my area, the coop stations have the best rated fuel. A lot cleaner, less ethanol, more gasoline.

dilsnick

what part of kansas did you move to?

Dickdeandestructo

Manhattan, like 10 miles from KSU.

cjmatt

iTrader: (4)

E85 bro

Dickdeandestructo

I can get E85 here. But, it seems like you can't run it with out bigger injectors and pump and a re tune.