[Diy_efi] LPG injection

[Derek]

> On the other hand, propane has a MUCH higher saturated vapor pressure, IAT
> for IAT than methanol does, so you are quite likely to get MORE net charge
> cooling from liquid propane than from methanol, regardless of the fact that
> its latent heat of vaporization is less.

So, give me some temp drops observed. I'd like to see them. I have dropped 90F
down to 30F, with the sensor mounted in the throttle body (figured more cooling
before the intake valve).

Give me some real world results, not "quite likely."

The few propane injection systems I have seen get about a 10F drop. I'm not sure
if they were liquid at the nozzle or not. I'll admit you should get more cooling
on a liquid vs gaseous injection.

Also note the fact that methanol makes more power at the same relative (lamdba)
air fuel ratio than propane or gasoline. Simply put, a given engine will make
more power on methanol than propane when tuned to the maximum.


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