The thing about ATF is that it's going to add a bit of viscosity (thickness) to the diesel fuel. Probably not measurable, but temperature may have an affect on it. Secondly, the ATF is going to combust slower (slower flame speed) and likely add a bit of lag to the actual ignition point.
As far as the ratio goes (ATF to fuel), that will have everything to do with the efficiency of the engine. You're certainly not going to hurt anything by running factory or aftermarket tuning designed for fuel-only use. However, I agree that a smidgen of SOI increase may help. However......if you're running ATF tunes without ATF, you may run into some combustion noise and possible engine damage. But, like I said, a SMIDGEN of advance....probably not enough to matter actually.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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Tue, April 6th, 2010, 01:31 PM
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