best gas
Thread Starter
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
best gas
hate to start a new thread about this , but in s fl...stations are now selling non ethenol gas....90 octane....do you think this would be better than the 93 octane premium they sell with ethenol??? should I add a little "boost" with this gas???
Thread Starter
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Burning Brakes
Joined: May 2009
Posts: 1,014
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From: Ft Wayne IN
Pro
Joined: Oct 2012
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It was also 90 octane i think, about the only good thing is no ethanol and mpg improve.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
If your 85 is stock, you should be running reg. (87 octane) gas according to what I read. FWIW running a higher octane then what is needed, hurts power. I suggest you look at your owners manual to see what is recommended.
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Safety Car
Joined: Sep 2001
Posts: 4,157
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From: Glenbeulah Wi
The 1985 will work best on 93 octane fuel. Those cars already pull too muck timing in stock form with the knock sensor and running 87 fuel will only make it worse. (It is a wise tale that high octane fuel hurts power, some engines may not need the extra ocatne so it could be waisted money but a 1985 vette could use 93 octane)
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
Lucky you....You have a track...
The fuel stations around here are also always swamped when the lottery sees high numbers.
Closest Track I know of to me is 140ish miles away and does not have any thing I could do, at a time I could get there.
The fuel stations around here are also always swamped when the lottery sees high numbers.
Closest Track I know of to me is 140ish miles away and does not have any thing I could do, at a time I could get there.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
The 1985 will work best on 93 octane fuel. Those cars already pull too muck timing in stock form with the knock sensor and running 87 fuel will only make it worse. (It is a wise tale that high octane fuel hurts power, some engines may not need the extra ocatne so it could be waisted money but a 1985 vette could use 93 octane)
Bjankuski, I had a 86 early version with the iron heads. I couldn't tell any difference running regular or high test in it. But to be honest, I never datalogged the car, so there could have been some timing pulled.
But I still say, if it was mine, and I could get non ethanol gas, I would run it instead. The 10% is going to cause the car to run a little lean vs pure gas. And the car was designed for pure gas. The computer may be able to correct for it but you are moving from the center by running ethanol enriched gas.
FWIW when I had my car tuned, my tuner Ed Hutchings tuned it for both E85 and 93-92 octane pump gas. He said its making about 20hp more on e85 but that is due to it being 104 octane. I have about 11.3 compression and in the tune for e85 he is able to run much more timing. I think he told me it takes about 30% more fuel to run e85.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
I kinda feel your pain. I used to have a track 2-3 miles from my house. I would put my slicks on and drive to the track. It closed down last year. :
The next closest track, about 35 miles away, after 2 passes, told me ,( slow it down, put a rollbar in it, or take it home.)
I really don't want to put a rollbar in it. Its a vert, and IMO it makes it much more dangerous on the street to have one.