99 7.3l snow meth or propane - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 04-24-2006, 01:52 AM Thread Starter
 
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99 7.3l snow meth or propane

My buddy just got his 99 motor redone. He put injectors and now he is wondering what is a better combo. Snow meth or propane. He pulls his race car through the mountains and want one of these.

please help:shrug:

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post #2 of 5 (permalink) Old 04-24-2006, 02:20 AM
 
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I have not used it myself : but the msd propane looks like a nice setup.:Thumbup:
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post #3 of 5 (permalink) Old 04-24-2006, 05:09 AM
 
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What kind of injectors did he put in? I've heard water and meth is safer than propane, and a few people have blown headgaskets/motors with propane. What about nitrous?
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post #4 of 5 (permalink) Old 04-24-2006, 01:58 PM
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Water injection may keep your EGT's from climbing, add meth though, and that reduction is reduced or in some instances, nullified. Methanol is a fuel and it is injected, somewhat uncontrolled, (only by nozzle size) and no one really knows or can tell you a "failsafe" mixture for the methanol(20/80. 30/70 50/50?) or exactly when is the best boost pressure to inject it at. It should be around 15-20 psi for diesels. But by the time you reach 15-20 psi, the EGT's are already up there. Water alone,could keep them from climbing higher.

Propane will not lower EGT's a great deal either only about 50-100 degrees, if your not dumping a ton of propane. For towing power, which is what you asked about, propane is hard to beat, especially in the mountains and can be shut off completely when the extra power is not needed.

Nitrous can not be used for towing power. It is good for short bursts of power for racing , dyno runs, etc. You'd quickly go broke if you tried as a bottle doesn't last long at the track, let alone climbing a steep grade.

Personally, I would tell him to break that engine in a bit, make sure nothing is wrong or rears it's ugly head, before adding anything that adds torque and horsepower.



BTW, don't believe everything you hear
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post #5 of 5 (permalink) Old 04-24-2006, 03:55 PM
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Been running water injection for about 20 months and 50,000 miles. Love it, use it daily and run a 20% meth when I want extra power... I have mine set to come on, first stage at 8psi and second stage at 13psi. I can not get the EGTs above 1200 when towing once the water starts spraying!

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