Fuel for '56 292
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Junior User
Joined: Feb 2003
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From: River Ridge, La
Fuel for '56 292
My '56 F250 is finally on it's way! Now is when the fun begins, right? I was wondering, will I have to use a fuel additive or will I just be able to use the high octane pump gas? Thanks, Daniel.
Posting Guru
Joined: Jul 2001
Posts: 2,119
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From: Southern New Hampshire
Fuel for '56 292
Ive been running pump gas and no additives for several years in many old engines including Y blocks. Ford and GM engines seem OK with modern gas; some MOPAR's ( all??) dont use stainless valves and they eat seats fast.
As far as octane, the 56 is low enough compression to run fine on 87.
When I built up the 292 to replace the 239 I deliberately went with 56 ECZ-C heads so I could run regular gas.
As far as octane, the 56 is low enough compression to run fine on 87.
When I built up the 292 to replace the 239 I deliberately went with 56 ECZ-C heads so I could run regular gas.
Posting Guru
Joined: Mar 2002
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From: Boise, Idaho
Fuel for '56 292
Besides the slightly larger chambers in Carl's ECZ-C heads, those heads are 'quench' designs; they resist detonation due to their compact combustion chamber shape.
When I sent my wife's 56 292 to the engine shop to get fitted for new pistons and get the crank turned, I had the shop 'zero deck' the engine. This is a big help in maximizing the quench effect.
When I sent my wife's 56 292 to the engine shop to get fitted for new pistons and get the crank turned, I had the shop 'zero deck' the engine. This is a big help in maximizing the quench effect.
Cargo Master
Joined: Apr 2003
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Fuel for '56 292
If your heads have been updated with hardened exhaust seats you should be fine running without additives. If they are stock, using a lead substitute would be a good idea. I did in fact have good luck running my tired old Y for about 3yrs without any additives. It should run now but it is in storage. If it hasn't been updated and you don't plan on rebuilding it any time soon and you want to get a lot more use out of it I would use the additive otherwise just straight pump gas will be fine.
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Sep 17, 2007 07:59 PM
