| [GMCnet] Cad 500 EGT [message #244238] |
Wed, 19 March 2014 08:32  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Is anyone else measuring EGT on a Cad 500? Hubert Rowell and I installed a
new set of thermocouples and a dual 4-digit display last Sunday.
http://www.auberins.com/index.php?main_page=product_info&cPath=5_21&products_id=357
http://goo.gl/fLm6ED
It's a neat system, and went in pretty easily. Just one problem with the
installation: After about 15 minutes of running, on of the thermocouples
decouples -- the temp readout drops about 800*F. I'm sure they'll replace
it with no problem when I get home from Montgomery, but for now I'll have
to be content reading the Left EGT.
The question is, "What EGT should I be reading 1" below the exhaust
manifold flange on the Cad 500?" Everyone else I know who's reading EGT
are running an Olds with headers. That arrangement places the thermocouple
considerably farther from the nearest exhaust valve than my arrangement,
and the headers cool the gases faster. So their common 1400*F redline may
be (hopefully is) below mine.
On the 600 mile run we've had so far, I'm cruising at 60 mph, 18-19" Hg,
14.7 AFR, 196*F H20, with EGT about 1440. My NASCAR engine buddy says
that's fine, but I'd sure like to hear of similar experience.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL
www.gmcwipersetc.com
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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