| Exhaust Crossover confusion [message #351584] |
Sun, 26 January 2020 16:07  |
 |
Tom Lins
Messages: 372
Registered: February 2004
Location: St Augustine, FL
Karma:
|
Senior Member |
|
|
I am confused over the temp readings I get using a non-contact temp gauge on the intake manifold.
I drove from the storage facility we keep our GMC at to my house (about 10 miles at 70 mph)
When I got into my driveway I opened the engine cover and measured the following temps.
End of left exhaust manifold 450 deg F
Top of choke stove 277 deg F
Top of runner to next cylinder fore or aft 225 deg F
Top of end of manifold fore and aft 217 deg
I was expecting the temp on the top of the choke stove to be higher if the crossover was not blocked.
The reason I was measuring the temps is to attempt to determine if my crossover is blocked short of pulling the manifold.
I guess another question I wonder about is if the factory choke would work at all if the crossover was blocked.
This all feeds into why I had 2 FI-Tech units fail after very short periods of time.
The first after about 800-900 miles and the second after 250 miles.
The engine runs fine now with the carb back on it.
Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
