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GhettoPop · 05-04-2004, 10:47 AM

crazypete- used the link you posted.
tire size = 225/60/15 = 25.6 height
at 60 MPH in 5th gear, i was at 1500 RPM's.
according to the formula, at 60mph w/ 2.73's, i sould be at 1720 mph's. obviously higher rpm's if i had 3.08's. so even though i was at 1500 and the link stated 1720, i think i have 2.73's. sound right? am i supposed to measure rpm's @ 60mph in 5th or 4th gear?

82GT- i will check the sticker and let you know what i find

all this would be resolved if i had the time to jack up the car and count the # of tire rotations in relation to driveshaft rotations!!!!!! HAHAHAHAHHA

05-04-2004, 10:47 AM	#14
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	crazypete- used the link you posted. tire size = 225/60/15 = 25.6 height at 60 MPH in 5th gear, i was at 1500 RPM's. according to the formula, at 60mph w/ 2.73's, i sould be at 1720 mph's. obviously higher rpm's if i had 3.08's. so even though i was at 1500 and the link stated 1720, i think i have 2.73's. sound right? am i supposed to measure rpm's @ 60mph in 5th or 4th gear? 82GT- i will check the sticker and let you know what i find all this would be resolved if i had the time to jack up the car and count the # of tire rotations in relation to driveshaft rotations!!!!!! HAHAHAHAHHA __________________ 1990 GT,stock T-5,K&N w/o air silencer,March underdrives,FMS wires,timing@14*,PA Perf 130amp alt,Steeda Tri-Ax Shifter,Steeda adj quadrant/clutch cable/firewall adj,Centerforce II clutch,o/r x-pipe,Magnaflow SS catback,g-load brace, subframes,Bilstein struts/shocks,Autometer gauges, 136k and running strong!