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Authenticity of a 1” GMR Chain

94GrandPrixSE

94GrandPrixSE

New member
Can someone please tell me how to correctly measure a real 1” gmr chain? In comparison to let’s say a 15/16”? These made by borg? Any help Is appreciated.
 


the GMR in front of me is a Morse (on link plates) hy-vo with a squirrel figure in profile after the vo (this may be a batch demarcation)

046 74607 is on the dark blue link. chain measures 1.060 OD from outer guide plate to outer guide plate .940 across the id
 


Whoops. The only way you can check wear is by installing it. The manual has a procedure for it with the chain installed.
 
the wear is from the links contacting the ISS tone wheel under heavy IS loading (slip n grip traction event at high power)

probably should sell the TR's 2.93 1" GMR
 
oh it'll hold, it still destroys the tone wheel/ISS sensor but the chain survives.... but your still pulling it apart....

the 7/8ths will handle 700whp...provided you dont slipngrip.

11 times we've broke transaxles. dyno's at 608fwhp e85 18psi. this last time we broke it was at 28psi and we spun the slicks at 105mph. IFR shows we woulda been at 700+ whp at the slipngrip
 


quick pic fer ya
GMR 1inch, GMR 2.93 sprockets (from statama bftgt), GMR armet 100 IS

7/16ths pitch 4t80e stuffs above it....

enjoy the GMR Pr0n
GM Racing GMR 1 inch chain and 2.93 sprockets, 1200hp GMR IS, 4t80e chain above - Google Photos

Csq3HvvuqMaZV5Gp7
 
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