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-   -   RING N PINION SIZE (https://www.racingjunk.com/forums/showthread.php?t=27586)

JEFF69Z28 03-13-2010 05:44 AM
RING N PINION SIZE
 
THINKING ABOUT BACKHALFING MY CAR WHAT SIZE RING N PINION WOULD I NEED TO GET 4.56 GEAR RATIO WHEN USEING 32X14X15 WHEELS?

MEMRACING62 03-13-2010 05:58 AM
if your backhalfing I would go with ford 9 in. tire size & gear ratio are two separate things, you need to choose the combinationof the two to achive the the desired rpm best for your set up.

JEFF69Z28 03-14-2010 11:44 AM
RIGHT NOW IM GOING THRU THE TRAP AT 7-7100 RPM,WOULD LIKE TO KEEP IT THAT WAY.9 INCH , DANA 60 OR MOSER M9 WHICH ONE IS LIGHTER.

wmeabates 03-15-2010 07:30 AM
Old tire rollout divided by new tire rollout=x.Old gear ratio divided x= new gear ratio.Old tire 90 divided by new tire 102=.88 4.56 divided by .88 =5.18.Put your numbers in.Bill.


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