Starter is dying...replace w/ 911 unit?, $100 more than a teener unit! Options

[Air_Cooled_Nut]

Starter works fine when cold. After a some driving, to where the starter gets heat soak, it will crank the engine VERY slowly as if the battery is very low on charge. Acts the same exact way while jump starting. But if I let the car cool down for awhile then it will crank like normal. I even had AAA come out and check the battery and charging system with their uber-cool, $600 hand-held analyzer and everything checked out 100%. So I know my battery (Optima) is in tip-top shape and my alternator is just as good.

I've read the hot-start relay threads and understand them. It's a band-aide for a failing starter as well as a safe-guard for the ignition switch. I may do it, I may not. Not sure. But I do know I need a starter. So, GPR has rebuilt Bosch units for the 911 @ $219 and 914 @ $112. Money is tight for me but I'd rather pay once than twice (IMG:style_emoticons/default/wink.gif)

I want to understand WHY the 911 starter is the prefered unit for replacement. I know it has more cranking power but is it at the same voltage/amperage draw as a 914 unit or more? Does the extra power spin the flywheel faster, resulting in a faster start? (IMG:style_emoticons/default/confused24.gif)

[JPB]

I bet your ground cable is loose somewhere. Mine did the same thing and it was the ground strap on top of the trany. The PO didn't have much for other grounds on the system (IMG:style_emoticons/default/blink.gif)