68 charger 440 hot start problem

[Outbackbobcat]

I think I know the problem but am interested if anyone else ran into this. Fresh rebuild runs great starts cold great, hot won't turn over, huge battery cable new 1000 cold crank battery, new high torque mini starter, still a problem, 14 degree advance, 35 overall, 10.5 compression. Here's what I fear is the problem, I installed both top and second rings at .022 - .025, I'm now reading the top should be more like .028. If I leave it cool down about 20 mins fires up, I'm thinking the rings are binding in the cylinder

 

[WileE]

Welcome... I guess. "Won't turn over" ok.... turn the key and... WHAT HAPPENS ? Engine locked ? Cranks but no fire ? My question is: Do you have heat saturation in the starter cable ?

 

[fine69]

Maybe it’s simpler? Like fuel evaporation or whatever it’s called when your gas boils in your fuel pump or carb. You could try a carb spacer and heat shield fuel lines.

 

[R413]

Headers? Heat soak starter.
Battery in trunk? Or underhood?

Both battery cables need to flow the same amount of current.

 

[Geoff 2]

You only need large ring gaps with hypereutectic pistons. Is that what you used?

 

[radical rob]

Please describe symptoms better. In my case starter gets heat soaked and wont turn over fast enough.

 

[Greg - Mopar2U]

This reads like the problem I just resolved - warm start: it felt like a dead battery, wouldn't crank. Let it cool and cranks/starts right now.

Ended up being the silly stupid disconnect I had on the battery. . . I don't know why that would be temp sensitive, but took it out and starts right up warm.

The 1000+ amp battery is in the trunk w 2/0 cables. I wrapped the headers and exhaust, I checked clearance of RobbMc starter. Nothing helped until a took out that disconnect.

Before you spend too much money - check the voltages at battery and starter, during start. If the starter voltage falls below 10 you might have a connector/wire problem that is adding resistance and stealing your amps.

Hope that helps.