Pump gas for Street/Strip cars ... ethanol content

[Burns69RT]

GetX'd you live in OC right? There's a 76 station in Fullerton that sells 110 oct race gas.

 

[GetX'd]

There is? I didn't think you could get anything but 91 around here. I'll look that place up. Can't be too many 76 stations up there. They all probably know each other. Thx for the info!!

 

[Burns69RT]

No problem and I believe it's the 76 off of Gilbert in Fullerton. Can't remember. My buddies and I would always get jugs of 110 before we hit the strip at Fontana

 

[Roughbird72]

Keep in mind - again I can't get even 93 octane. Best case is 91. Would I have to use the octane booster to bring it up closer to at least 93??

Yeh, that does suck only being able to buy 91.
I just thought i'd do this to see who's "high" octane unlead has the least amount of ethanol. From what i've been told 3-4% is about as low of ethanol content im going to find.

Wallace's fuel mix calculator.
http://www.wallaceracing.com/octane-mix-calc.php

 

[Bigal75]

94 Sunoco ultra...has up to 10% ethanol. The good news is AV gas is easy to get so I usually mix 50/50

 

[74Beeper]

We only get 91 here in North Dakota..... But we do have a new ExxonMobile gas station that sells no ethanol 91. Best pump gas I've ever ran. The exhaust fumes actually smell slightly like race fuel.
But maybe I'm a lil bias since I work for Exxon! Haha

But seriously, ExxonMobile gas is top notch.

 

[747mopar]

I run 93 from Speedaway in mine, it doesn't ping on 89 but I seem to have more heat related issues with it so I just run 93 with no issues.

 

[Roughbird72]

We only get 91 here in North Dakota..... But we do have a new ExxonMobile gas station that sells no ethanol 91. Best pump gas I've ever ran. The exhaust fumes actually smell slightly like race fuel.
But maybe I'm a lil bias since I work for Exxon! Haha

But seriously, ExxonMobile gas is top notch.

Must be nice to have ethanol free gasoline

 

[Gpuller]

http://www.pure-gas.org/

 

[Bruzilla]

I buy ethanol-free gas. It's about .30/gallon more, but you use less since it produces more power. You can go to this website to find a station near you. http://pure-gas.org/

 

[Roughbird72]

Nearest would be 35-40 miles for me.
Countrymark 91 (Ag) seems to be the most abundant ethanol free in Indiana.

 

[Bigal75]

Our Shell V power doesn't have ethanol. It's only 91 octane though.

 

[Roughbird72]

I think my problem is i'm in Indiana, land of corn & ethanol subsidies.lol

 

[GetX'd]

I buy ethanol-free gas. It's about .30/gallon more, but you use less since it produces more power. You can go to this website to find a station near you. http://pure-gas.org/

Bruzilla - I have access to one of the stations that is ethanol free near my home. The problem is their max octane is 91. Would that be sufficient for a built 440 to run on? I was told by the builder 93 was the minimum I would Need to run in it. I'm just wondering if the ethanol free impacts that at all. What do you think?

 

[Bigal75]

11:1 - 94 Sunoco Ultra with up to 10% ethanol. I use AV gas too. Stuff is great and ony a few pennies more per liter.

 

[GetX'd]

Bruzilla - I have access to one of the stations that is ethanol free near my home. The problem is their max octane is 91. Would that be sufficient for a built 440 to run on? I was told by the builder 93 was the minimum I would Need to run in it. I'm just wondering if the ethanol free impacts that at all. What do you think?

Does anyone know if you can run 91 octane in a built 440 if it's ethanol free gas? Does the no ethanol content make a difference?

 

[Roughbird72]

Does anyone know if you can run 91 octane in a built 440 if it's ethanol free gas? Does the no ethanol content make a difference?

91 with no ethanol would be better than 92 with ethanol.
Knowing what you can get by with depends on the Dynamic Compression Ratio of your engine. Typically an iron headed engine with a 8.0:1 DCR or lower can get by with 93, with aluminum heads i believe 8.2:1 DCR.
Ex. my 440 has a static compression ratio of 10.63:1, but due to the camshaft i'm running & a few other factors my DCR is 7.2:1

Many factors related to DCR, you need to know all the specs on your engine.
http://www.wallaceracing.com/dynamic-cr.php