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My stocker cranks mimy 12.6:1 396 over no prob

 

There isn't a difference between LT1 Corvette and LT4 Corvette starters, but there is a difference between the Corvette starter and the F-body LT1 starter. The Vette starter is a Nippondenso, and is more squared off looking; it doesn't look like any Chevrolet starter. The LT1 F-body starter looks more conventional, but it smaller than the typical Chevy V8 starter from Gen1.
Based on the broken plastic planatery gears that came out of my F-body LT1 starter, I'll be upgrading if they break again (got it fixed cheap by the local rebuild shop).

 

Stock starter on over a dozen high CR LTx cars and no problems

 

I know this thread is old but my motor is 13.6:1 and the stock starter works but it takes a bit of effort
I was wondering what my options are for higher torque starters

 

I had a mini Starter from Jegs, lasted a year before it started giving me problems. When it got hot it would stop working. Went back to stock, no issues, I have a bolt on car with Hooker LTs

 

I have 11-1 compression and I have a digital 6 msd ignition with a start retard. Whenever the tach signal is below 400rpm, it retards the timing 20 degrees.
Even when my engine is hot, it starts, no problem.

 

I have a digital 7 box and I retard the timing 20 degrees as well
I guess the differance between 11:1 and 13.6:1 is a fair bit

 

That seems like a lot. Is there a reason you chose 20*? I'm interested since I'll be running about 11.5:1.

 

Interesting... My motor hydrolocked when I tried to start it on coolant with an LT4 starter. I have put 3000 miles on it since them so I'm hoping the rod is fine.

 

Quoting myself... the same gear broke again, by the 2nd start. I replaced it with a Summit brand Hitachi style starter, and it is fine so far. I never had an issue with the stock starter turning the engine over, it just liked breaking the plastic gear.

 

the guy that tuned my car told me to use 20 degrees

 

I have an LT4 starter on a 12.77 to 1 383, works very well.


David

 

This is YOUR thread!

 

You'd know if all wasn't well. Broke part of the piston too....and knocked pretty loud because the rod was SHORTER, which caused the base of piston to hit the crank every rotation!