View Full Version : RING N PINION SIZE
JEFF69Z28
03-13-2010, 05:44 AM
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.