Rebuilt engine lacking power - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MJN** · 09-10-2018, 02:16 PM

Sure hope its accurate, thats how I assembled the engine, TDC with the balancer lined up on zero.

geezer#99 · 09-10-2018, 02:20 PM

Before you put the heads on did you set #1 at tdc with a piston stop and then install or mock-up your balancer and timing tab?

**MJN** · 09-10-2018, 02:23 PM

Just followed the How-To Rebuild Your Small Block Chevy Book, step by step during assembly. I can't remember exactly off hand at the moment the sequence of events, I also had assembled it over a year ago now.

geezer#99 · 09-10-2018, 02:53 PM

So your timing tab/balancer May or may not be accurate.
Easiest thing to do is power time it.

**MJN** · 09-14-2018, 05:43 PM

So I got some help from a local engine/speed shop. Timing was 34 total to begin with. Bumped the total timing to 40 and adjusted the idle mixture screws a bit. Also, I had the throttle cable stud in the top hole like the GM shop manual said (not sure why pickups used the top hole and Suburbans and others used the bottom hole according to the manual), moved it to the lower hole and that also helped.

09-10-2018, 02:16 PM	#51
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,095	Re: Rebuilt engine lacking power Sure hope its accurate, thats how I assembled the engine, TDC with the balancer lined up on zero. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

09-10-2018, 02:20 PM	#52
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,777	Re: Rebuilt engine lacking power Before you put the heads on did you set #1 at tdc with a piston stop and then install or mock-up your balancer and timing tab?

09-10-2018, 02:23 PM	#53
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,095	Re: Rebuilt engine lacking power Just followed the How-To Rebuild Your Small Block Chevy Book, step by step during assembly. I can't remember exactly off hand at the moment the sequence of events, I also had assembled it over a year ago now. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

09-10-2018, 02:53 PM	#54
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,777	Re: Rebuilt engine lacking power So your timing tab/balancer May or may not be accurate. Easiest thing to do is power time it.

09-14-2018, 05:43 PM	#55
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,095	Re: Rebuilt engine lacking power So I got some help from a local engine/speed shop. Timing was 34 total to begin with. Bumped the total timing to 40 and adjusted the idle mixture screws a bit. Also, I had the throttle cable stud in the top hole like the GM shop manual said (not sure why pickups used the top hole and Suburbans and others used the bottom hole according to the manual), moved it to the lower hole and that also helped. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com



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