The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

69heavychevy · 03-24-2009, 06:05 PM

i was wondering if anyone here was running a thumper cam, #12-600-4 to be exact. i just got thorugh installing one in my truck but having trouble with the timing. i seem to have to retarded quite a bit to get it to even run right. if anyone is running this came what do they have their timing set to. im also open to any suggestions. oh yea i have a performer rpm, edelbrock 600cfm, headers, and 993 heads. thanks in advanced!

03-24-2009, 06:05 PM	#1
69heavychevy Registered User Join Date: Jan 2007 Location: Garland,TX Posts: 431	having hard time with the thumper cam i was wondering if anyone here was running a thumper cam, #12-600-4 to be exact. i just got thorugh installing one in my truck but having trouble with the timing. i seem to have to retarded quite a bit to get it to even run right. if anyone is running this came what do they have their timing set to. im also open to any suggestions. oh yea i have a performer rpm, edelbrock 600cfm, headers, and 993 heads. thanks in advanced!