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By trodom - 4 Years Ago
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ORIGINAL 292 FORD V8 WHICH GAS NOW IS BEST
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By DryLakesRacer - 4 Years Ago
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I don’t know where you live which may or may not make a difference. Many use regular unleaded with no ethanol if they can get it. My 292 has 8.4 to 1 compression so 87 is fine. My state has up to 15%. My ignition timing is at 10* BTC and it has never pinged. I chose to use an additive in every fill-up to hopefully negate the ethanol’s possibility of damaging the system. I have done it for 9 years and 11,000 miles without a fuel related incident. 1oz of Stabil Marine now and before Blue Star. I also have had a Petronix ll ignition and my spark plugs have always looked right. Good luck and enjoy your car…
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By Florida_Phil - 4 Years Ago
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I use Florida 93 octane gas in my TBird. Ethanol free gas is available, but it a long haul for me. I run 36 degrees total advance. My car has stock "G" heads and flat top pistons. My carb and fuel system is compatible with current fuels. My engine never pings or runs on.
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By 62bigwindow - 4 Years Ago
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Ethanol free if at all possible. I'm fortunate that there are several stations near me that have ethanol free fuel. After filling my tank with 10% ethanol blend twice I had to change out the needle and seat in my carb.
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By 312YBlock - 4 Years Ago
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I use Sunoco 93 plus 1 oz/gal of SeaFoam gas treatment for carbon and to stabilize fuel.
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By Ted - 4 Years Ago
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All of my cars with a carburetor I’ll use 91-93 octane premium. Ethanol free is not available close to me and the premium grades always checks out at 3-5% ethanol versus 10% or more ethanol in the 85-87 octane grades. Be forewarned that I have come across gasoline here in the shop that had over 30% ethanol in it. Needless to say the engine that was being used in was on the dyno and it did not run very well until the fuel was changed out to the 5% content premium. I’ll add that some of those engines that have the original Holley Teapot carbs tend to be a bit fussy with ethanol laden gasoline and requires the jetting to be increased to compensate for a lean condition that occurs because of the ethanol content.
The only issue I’ve had with the 3-5% ethanol laden premium grade gasoline is it does evaporate more quickly from the fuel bowls than ‘straight’ gasoline. As long as I run those cars at least on a weekly basis, there have been no starting problems related to the evaporation.
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By 312YBlock - 4 Years Ago
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Great info Ted, I had no idea ethanol could be that low in premium gas ⛽️ yes it does evaporate faster, I can see it drop in the sight glass in just a few days . My 55 runs great on 93 Sunoco with a Summit 600 CFM carb.
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By FORD DEARBORN - 4 Years Ago
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93 octane pump premium has worked well going on about 9 years now. Until I rebuilt the engine, it didn't need 93 octane but used premium due to less ethanol content. Since the rebuild, regular 87 octane will produce a spark knock. Using the vehicle often enough to maintain a fresh supply in the tank/carb is important. I may be wrong but I believe premium having less ethanol has a longer shelf life when compared to regular 87 octane. For what it's worth, I never have used any fuel additives in my truck. I put about 3,000 miles per summer and the truck isn't driven for about 4? months during the winter/salt season. In my location, ethanol free fuel is a about a 10 mile drive and the station charges an extra 50 cents per gallon over and above the price of 93 octane premium because they can. Thanks Ted for reporting the percentages of ethanol. Last test I did was about 6 years ago at 6%. I think it's time to check again and when I do, I'll let every9ne know.
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By Daniel Jessup - 4 Years Ago
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This link may help: https://www.hotrodreverend.com/post/2019/07/13/1955-ford-part-81-running-with-the-devil
It concerns a post from my personal website where I have thousands of photos and videos archived. This particular blog post concerns running with Ethanol fuel.
Here is another post about the rebuild of an Edelbrock carb that was running ethanol fuel through it for 4 or 5 years but sitting at 2 month intervals. Like Ted and the others say, it is best to keep the fuel moving...
https://www.hotrodreverend.com/post/2019/04/19/1955-ford-part-75-csi-work-on-the-edelbrock-carburetor-and-ignition
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