I went to a local cruise last night and the car ran great. On the way home I stopped for a traffic light and when I went to pull out the car stumbled and backfired throught the carb. I had about another five miles to get home and it was running rather poorly. All indications are that it blew the power valve. The idle speed is up and it is running rich at idle. I removed the air cleaner and put a finger over the vertical vent and the car died immediately. I am going to rejet the carb with the correct jets when I replace the power valve. Can improper jetting contribute to the power valve failure? I know what size they are but I am not familiar witht the correct power valve to install. It is a stock 4150 carburetor. All expertise is appreciated.
-
-
Re: C2-65 396 power valve
carb 3124 uses #85 power valves both ends and #70 jets pri and # 76 sec. -
Re: C2-65 396 power valve
Thanks ClemComment
-
Re: C2-65 396 power valve
Clem, I just want to clarify the size of the power valve for an L78 application. Holley recommends #65 for most normal driving. Can you explain what the results are of using one or the other. The other being #85 that I presume is the correct original.Comment
-
Re: C2-65 396 power valve
a #85 will start to open sooner than a #65 so the fuel curve will richen up sooner to prevent a lean condition on accellerationComment
-
Re: C2-65 396 power valve
Clem, Thanks again for your expertise. I just ordered everything.Comment
-
Re: C2-65 396 power valve
Clem, would the #85 powers valves and #70 and #76 jets also apply to carb 3247 used on an L-72?Comment
-
Re: C2-65 396 power valve
both power valves are #85 pri jet 70, sec jet 76Comment
Comment