If anyone out there has access to a IR Scope it could be used to find the temperature quadrants on the heads of engines types[ VW Corv. Cont. and etc.]. The info would indicate where to place sensors. I have worked with these scopes at GM, but the scope is GM's not mine.
KRRon ----- Original Message ----- From: "Oscar Zuniga" <[email protected]> To: <[email protected]> Sent: Tuesday, August 23, 2005 4:40 PM Subject: KR> engine CHT temps > In response to the exchange on location of the temp probe for CHT, I'll > repost this from Dec. of 2003 for your consideration: > ================== > Howdy, Netters- > > I got my "Beetle Flyer" (from Great Plains Aircraft Supply) over the > weekend > and took notice of a tech tip on locating your CHT sensor on the VW engine > ( down the page, at http://www.greatplainsas.com/bf20032.html ). Standard > practice is to install it under a spark plug, but Steve Bennett points out > that your CHT temps will read high if you do this... by as much as 150F. > He > recommends installing it under a head stud (location is given in the text > in > the Flyer, but not as clear as it could be). Long and short of it is that > if you're running a VW and have your CHT sensor under a spark plug, you > may > not be getting readings that reflect what you're really interested in. > > If Bob Hoover is still monitoring this list, maybe he would care to chime > in? If Steve is monitoring this list, maybe he would care to elaborate > more > clearly on the preferred location? The picture in the Flyer identifies a > boss that is used for fuel injection temp. probe, but doesn't say this is > the recommended spot (and doesn't seem to be a good spot anyway). The > idea > is to respect the metallurgy of the head castings by not allowing the CHT > to > exceed recommended temperature... bad and irreversible damage can result > if > the metal gets too hot. > > Oh, and somewhat timely and related to Mark Jones and Mark Langford's two > different approaches to cooling plenum on the Corvair, the Beetle Flyer > also > addresses cooling plenum design for the VW on the above-referenced > webpage. > > Oscar Zuniga > San Antonio, TX > mailto: [email protected] > website at http://www.flysquirrel.net > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to [email protected] > please see other KRnet info at http://www.krnet.org/info.html > >
