Well . . . sometimes you can, but it's a rare circumstance.
A 12 volt starter motor is designed to work properly at 9-10 volts. Some cars/trucks with light-duty direct-drive starters can be made to have problems when greatly over-batteried and cranking voltage gets up near 12 volts. But, that's pretty hard to do.
One example is my 64 SS Chevelle with a 327. Due to high compression pistons, over-advanced timing specs with a hot cam etc. it was a hard cranker at times. Since I had many big batteries around, I got the bright idea to install two huge tractor batteries in the trunk with 2/0 cable running up front. Cranking voltage jumped from 9.5 up to 11 volts. It made a huge difference in cranking speed. But - no matter what I did, I could not get the Delco starter drives from breaking. Finally went back to one battery and no more failures. Eventualy, I installed a gear-drive starter.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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