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Greg:: The system you have described is the system I have installed on my Alon. It is an ARP system and it uses an optical probe in a the Marvel-Schebler Carburetor, that actually "see's" an ice build up. the device has a sensitivity adjustment that you can set on a "flicker" threshold and it is very telling of impending ice formation and engine deterioration. Several years ago I had a rough engine situation that traced back to a newly overhauled carb. I sent the carb back and it was returned two days later with no explanation and it has run fine since. Wayne ----- Original Message ----- From: "Greg Bullough" <[EMAIL PROTECTED]> To: "Dennis Spiegel" <[EMAIL PROTECTED]> Cc: <[email protected]> Sent: Thursday, October 14, 2004 12:42 PM Subject: Re: [COUPERS-FLYIN] There I was, minding my own business > ----[Please read http://ercoupers.com/disclaimer.htm before following any > advice in this forum.]---- > > > At 03:17 PM 10/14/2004, Dennis Spiegel wrote: >>Greg , when you pulled heat after a second, or so, didn't it get rough >>when the water went through- you didn't mention it.usually you get a RPM >>drop, as you know, then rough when the melt-off goes thru. > > No, it didn't. Perhaps there wasn't enough water to roughen the engine...a > little > ice well-placed, maybe? > > That's actually one reason why I asked my IA about it...only the lasting > improvement > given by carb heat pointed to carb ice. I had some doubts that perhaps > carb heat was > masking the real problem, by richening the mixture and/or activating the > alternative > air source...which would help in the case of, for example, a badly bugged > up air > filter. However, having steady, full, static RPM on the ground suggests > that whatever > it was is something...like ice...which got gone. > > Remember, this wasn't the classic situation where RPMs began to fade away > with > restriction of the venturi. Something more interesting clearly happened > inside that > carb. > > Greg > ========================================================================== ==== > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers/ > > > > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
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