Originally Posted by LiftFlat
I was under the impression that when you ran a remote mount solenoid on GM (SBC/BBC) and MOPAR LA series engines, that you could removed the existing solenoid, is this correct? Or does the existing solenoid need to stay in place to connect the hot lead to?
No. On a GM at least, the solenoid actually serves two purposes. It acts as a relay to switch the starter motor on and off, and it also serves as a true solenoid to push the starter drive into mesh with the flywheel. You still need this second function, but the GM hot start problem is related to the first. That's why the remote solenoid (technically, it's only a relay since it's only switching current, not providing mechanical motion) solves the hot start issue.
You need to install a copper strap between the two large terminals on the GM solenoid. This shorts across the motor relay terminals (since the remote solenoid now performs this function) but still allows the starter drive function to work.