problem with HEI conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

doodah man · 07-01-2011, 10:01 PM

I studied all the threads on here and other websites for HEI conversion, and I'm almost there I think.

I got the new distributor in and the truck starts up, but it's about 4* retarded at idle with the vacuum advance connected and another ~20* retarded with the vacuum advance disconnected. The timing was 16* advanced w/o vac with the points dizzy. It started up ok and idles stable, but it sounds totally different.

Any ideas what's happening before I tear it down and start over?

07-01-2011, 10:01 PM	#1
doodah man Registered User Join Date: Apr 2011 Location: Philadelphia, PA Posts: 173	problem with HEI conversion I studied all the threads on here and other websites for HEI conversion, and I'm almost there I think. I got the new distributor in and the truck starts up, but it's about 4* retarded at idle with the vacuum advance connected and another ~20* retarded with the vacuum advance disconnected. The timing was 16* advanced w/o vac with the points dizzy. It started up ok and idles stable, but it sounds totally different. Any ideas what's happening before I tear it down and start over? __________________ 1972 C-10 Deluxe 350 V8 - 350TH ------------------------------ We're not the jet set We're the old Chevrolet set



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