How much timing... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

87Lowrider · 11-01-2008, 12:05 AM

Hey guys,

I'm running a '76 454 std bore, with 781 heads 2.190/1.880, Comp Cams XE 274h, matched springs, CC full Roller Rockers, MSD Digital 6, 85551 Dist, HVC Coil (blue), Edelbrock Air Gap, 1407 carb.

I've been babying it this summer what little I've driven it just working out the bugs in various systems... It's just a cruizer, not been on the track and probably wont be. But, that last couple times I stabbed it, it wants to studder above 4k rpm, although it pulls well between 3k and 4k... Plus after I've driven it a bit and turn it off for a short period of time, when it starts it grunts like the timing is off.

What is a good starting point for the timing on this setup?

Thanks,

Kenny

71Dragtruck · 11-01-2008, 08:26 PM

Try 36 total

87Lowrider · 11-02-2008, 11:35 AM

Thanks!

I'm gonna work on it today.

Kenny

RatPwrd72 · 11-02-2008, 12:15 PM

I run 36-38 in my 468 with 781 Heads on pump gas...

87Lowrider · 11-09-2008, 02:04 PM

Quote:

Originally Posted by RatPwrd72

I run 36-38 in my 468 with 781 Heads on pump gas...

Hadn't checked this thread in a few days.. Truck is still parked with fuel pump issue.

When I installed the cam originally, I didn't degree it (correct term?) so how do I get 36-38 total timing when timing marks only show 0-? at the balancer??

Thanks!

Ken

11-01-2008, 12:05 AM	#1
87Lowrider Navy Radioman Veteran Join Date: Jul 2007 Location: Western Kentucky Posts: 1,356	How much timing... Hey guys, I'm running a '76 454 std bore, with 781 heads 2.190/1.880, Comp Cams XE 274h, matched springs, CC full Roller Rockers, MSD Digital 6, 85551 Dist, HVC Coil (blue), Edelbrock Air Gap, 1407 carb. I've been babying it this summer what little I've driven it just working out the bugs in various systems... It's just a cruizer, not been on the track and probably wont be. But, that last couple times I stabbed it, it wants to studder above 4k rpm, although it pulls well between 3k and 4k... Plus after I've driven it a bit and turn it off for a short period of time, when it starts it grunts like the timing is off. What is a good starting point for the timing on this setup? Thanks, Kenny __________________ 1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71

11-01-2008, 08:26 PM	#2
71Dragtruck Registered User Join Date: Jun 2004 Location: Saskatchewan, Canada Posts: 1,368	Re: How much timing... Try 36 total __________________ Speed is just a matter of money, question is how fast can you afford to go? 8.95@148.97mph all motor haven't tried bottle yet Sponsored by: Getz Oilfield Consulting Hard Candy Customs

11-02-2008, 11:35 AM	#3
87Lowrider Navy Radioman Veteran Join Date: Jul 2007 Location: Western Kentucky Posts: 1,356	Re: How much timing... Thanks! I'm gonna work on it today. Kenny __________________ 1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71

11-02-2008, 12:15 PM	#4
RatPwrd72 Registered User Join Date: Jan 2005 Location: Maysville, OK Posts: 227	Re: How much timing... I run 36-38 in my 468 with 781 Heads on pump gas... __________________ 1972 Chevy Cheyenne Super- Pump gas 496,TH-400, TCI Stall, 3.73's,Ochre & White two-tone w/Olive Interior 1967 Chevy Short Step Drag Truck-Iron Headed 468 Making Memories My momma took me off the bottle years ago.....



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