Propane/water/alcohol injection and O2 sensors

Axel Rietschin Axel_Rietschin at CompuServe.com
Tue Apr 9 21:52:24 GMT 2002


----- Original Message -----
From: "Greg Hermann" <bearbvd at mindspring.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, April 09, 2002 22:18
Subject: RE: Propane/water/alcohol injection and O2 sensors

> What WI does, if done RIGHT, is lower the temperatures throughout the
> compression, power and exhaust strokes by a _SIGNIFICANT_ amount--like 500
> to 600° F !! The lower temps have a significant effect on engine
> durability. WI also lowers the peak combustion pressure, and the loading
on
> the engine's bearings for a given HP output level--which is QUITE a bit
> more than just "staving off detonation" !!!

Did you actually instrument a combustion chamber to support your 500-600 dF
during compression, power and exhaust strokes with hard evidences?

I did not, but my datalogged pre-turbo K-type EGT probe doesn't show such
big differences. What I've seen on my own engine is the EGT sort of
stabilises at 1000C (~1800dF) instead of climbing to 1100-1150 and the data
recorded on another similar engine shows about the same numbers (maybe
slightly lower overall, actually, as it is running on race fuel with more
ignition advance and less boost due to a 34mm intake restrictor)

--Axel



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