Switching fuels.

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Switching fuels.

Post  FordMudBogger15 on March 26th 2014, 7:35 pm

What all goes into switching from an alcohol burning motor to running pump gas? Or vise versa. Is it as easy as switching from a hat tunnel ram setup to a single plane carb intake? Or do you have to switch out the whole rotating assembly?

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Re: Switching fuels.

Post  bbf-falcon on March 26th 2014, 7:55 pm

You don't have to change the internal parts at all. If you are running a carb setup,you will need to change that,fuel pump may or may not need to be changed,depends which fuel you go with,fuel filter will need changed. maybe fuel lines.

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Re: Switching fuels.

Post  FordMudBogger15 on March 26th 2014, 10:30 pm

So say I was running a mechanical injection with a hat, that is only steps it would take?

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Re: Switching fuels.

Post  Wheelie58 on March 26th 2014, 11:13 pm

A couple things come to mind.
If you have an injected alky engine, it most likely has high compression.
You mentioned changing to "pump gas"....which may experience severe detonation on 12...13...14 to 1 ratios.
To change your injected engine to race gasoline, it will just take a different tune-up....nozzle jets, main bypass jet and any high speeds. You will also need to reset idle mixture.
If the engine ran good on alky, with the correct tune, it will run fine on race gas.
Pump gas would probably require lowering the mechanical compression ratio.
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