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Old 04-01-2012, 06:57 PM
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84 vette

ok I now have my paper from summit gear reduction starters it states distance from pinion to flexplate.100+/0.040 inch) (2.54 mm) see photo
I need to know this plain terms 1/8 1/4 so on I have not had any luck
converting it. Thanks
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Old 04-01-2012, 08:22 PM
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.125 is 1/8 inch, so .100 with a +/- .040 puts you in the 1/16 to 1/8" range for mfg acceptable parameters
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Old 04-18-2012, 06:47 PM
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Quote:
Originally Posted by saltbob
ok I now have my paper from summit gear reduction starters it states distance from pinion to flexplate.100+/0.040 inch) (2.54 mm) see photo
I need to know this plain terms 1/8 1/4 so on I have not had any luck
converting it. Thanks
The wire of a big (~2" long) paperclip is right at 0.045".
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Old 04-18-2012, 06:55 PM
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Converting fractions to decimal is easy.

Think of a fraction as dividing two numbers. For example: 1/8 is the same as 1 divided by 8 which is the same as .125

1/4 is the same as 1 divided by 4 which is the same as .250 and so on....
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Old 05-10-2012, 04:10 AM
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starter issues

there are 2 main flywheels chevy used... past that ive never used shims and never had any problems except one... 89 gmc pickup with a big block... eventually i discovered the reason i couldnt get the starter close enough to the fly wheel was ... the area on the block where the starter bolts up had not been machined down far enough from the factory. a quick trip to yakima grinding and never again will i chew off teeth on a flywheel... hope this helps or at least is a thought
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Old 05-12-2012, 11:05 AM
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84 vette

Thanks the starter gear still goes on flexplate half way but is working ok
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Old 05-25-2012, 08:20 PM
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If it's only engaging halfway, it'll never last. Corvette downsized their
starters in 1988. I put one on the TPI firebird motor in my S-10 in
1992 and it has never failed me. AND, it fits.

Gary Kosier
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Old 10-01-2012, 07:51 AM
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Quote:
Originally Posted by saltbob View Post
ok I now have my paper from summit gear reduction starters it states distance from pinion to flexplate.100+/0.040 inch) (2.54 mm) see photo
I need to know this plain terms 1/8 1/4 so on I have not had any luck
converting it. Thanks
In the photo it appears the leading face of the pinion gear is much farther away from the edge of the flex plate, which would account for only partial engagement.

Old thread - but I just wanted to pass along I purchased an 80 Vette a while back that the PO had used a Summit or Jegs starter with the exact same results.
BE cautious and check the engagement out before you ruin a ring gear when installing an aftermarket starter.
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Old 10-07-2012, 01:57 PM
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I installed a Powermaster Sbc starter and I had opposite results.
The starter gear was about 1mm away from the flexplate. I tried to run it to see how it would work and there wasnt enough room to let the gear come back, the starter ran with the engine. When I shut it down the gear came back.
So I got an Internal shim kit from Summit. Moves the body/gear back and is now clearanced to spec.
__________________
Ryan350 :thumbup:
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Old 10-15-2012, 06:06 PM
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Thanks the starter gear still goes on flexplate half way but is working ok
'not working'
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