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Username Post: Heat problem from Headers        (Topic#356290)
ibralphers 
Poster
Posts: 1

Loc: Florida
Reg: 05-04-19
05-04-19 10:01 AM - Post#2765711    

Hi guys. I have a custom built 66 Nova with sbc bored/stroked to 390ci and it has custom NASCAR type headers. The builder, a NASCAR driver/racer, added heat shielding with heat rap to help cool the starter. After the first startup, it will barely turn over. Changed battery from 450 to 750 amps to help - no help. Battery is in trunk, checked the poles and cables back there - all good. We think the heat from the Headers is dragging the starter down. Any ideas for a fix ????



 


Shepherd 
Frequent Contributor
Posts: 1953

Loc: Lake George, NY
Reg: 11-11-15
05-04-19 01:37 PM - Post#2765719    
    In response to ibralphers

Or you have too much voltage drop over the long cables from the trunk.



 
Rick_L 
Member #409
Posts: 27683
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
05-05-19 09:39 AM - Post#2765763    
    In response to Shepherd

The next thing to check is ignition timing. Many times an engine will crank just fine cold but be hard to turn over or kick back against the starter when hot. Retarding the initial ignition timing will help that. If you really need the advance at high rpm, you can add more mechanical advance to your distributor.

This is very common with high compression engines and has nothing to do with "heat soak" or heat related issues.



 
Mel Foye 
*VIP* Original Founding Member Group
Posts: 4955
Mel Foye
Reg: 09-29-00
05-05-19 10:05 PM - Post#2765799    
    In response to ibralphers

When every thing is cool does it spin over with a lot of zip? What is your voltage at the battery TERMINALS not cables and eng not running?
Answer to those two questions will help give next steps.



 


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