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Old 07-24-2011, 04:11 PM   #21 (permalink)
Diesel Addict/No Cure
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Originally Posted by oil pan 4 View Post
CNG is cheaper to use but the start up cost is high and its difficult to store a lot of CNG on a car or truck.
I wouldn't mind running propane again but I think my compression ratio with turbo is too high, if I did use propane I would only be able to use it in say the 2-6 psi of boost range.
I have considered running water methanol at lower boost.

I think I would be better off running water methanol since it would enhance the temperature differential between both the hot and cold reservoirs. The evaporation of the water methanol makes part of the cold reservoir cooler, then when the diesel is injected and lights off the methanol, both burn off and help make the hot side hotter.
Actually, your compression ratio is fine with boost. Go over to Heath Diesel's site and see what they are doing. Try 30 psi boost on top of 22.5 to 1 compression, water-meth injection, twin turbos, NO INTERCOOLER. All on a 6.2/6.5 based engine.

The race truck gets 30 mpg on the highway. Does over 160 mph. Stock cam, heads, intake manifold, etc. Good stuff.

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Last edited by cleanspeed1; 07-24-2011 at 04:27 PM..
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