So I am throwing this out there for the group to chime in on.
I am currently running a stock PMGR mini starter from a 95 mustang. It works well but seems to crank my engine slower than the old direct drive unit. I upgraded to the mini starter as my 347 is a 10-1 with a high lift cam which makes it a fair amount harder to turn than a stock V8 etc.
Noticed the PMGR starter has 10 teeth and the old direct drive unit had 9 teeth. I get that the gear reduction feature spins the starter slower with more torque. However with the 10 tooth gear it should spin a bit faster than a 9 tooth, so not sure how it works out for final cranking speed but I think overall the PMGR is a bit slower.
Doing some research I found that the 96-04 mustang starters use a 12 tooth drive. The replacement drives for these look exactly the same as the 95 PMGR etc. It seems ford started putting these 12 tooth drives in some later models etc. Perhaps this was done to increase cranking speed ? or perhaps they increased the gear ratio as well and it is the same ?
So my big idea to improve cranking speed is to simply replace the 10 tooth drive with a 12 tooth drive. I think it should be compatible with my 157 tooth flywheel (which I think is the same tooth count as the newer 4.6 flywheels etc)
Anyone messed around with this or simply used a 12 tooth starter from a 96 up mustang ?
Connect With Us