dbsupra GM transmission swap
- Thread starter dbsupra90
- Start date
here is a quick break down
3.73 gears 26" tire
55 mph= 2650 rpm
65 mph= 3150 rpm
75 mph= 3600 rpm
100 mph= 4800 rpm
3.11 gears 26" tire
55 mph= 2200 rpm
65 mph= 2600 rpm
75 mph= 3000 rpm
100 mph= 4025 rpm
3.51 gears 26" tire
55 mph= 2500 rpm
65 mph= 2925 rpm
75 mph= 3400 rpm
100 mph= 4550 rpm
i don't know that i would want to go as low as 3.11. that will hurt performance in a big way. in both spool and accel. a 3.5x gear really doesn't show itself until the higher speeds. down low it is fairly comparable. at highway speed you will see a couple hundred rpm difference. if you ran a 27" tire w/ the 3.51 gears it would help knock off another 100-200 rpm at 75-100mph.
also keep in mind the converter will play some role in rpm as well. a really loose converter (high stall) will typically have slightly higher rpm than a tighter one.
and jeff, i DO work on my car! well, atleast when the stars are aligned.
3.73 gears 26" tire
55 mph= 2650 rpm
65 mph= 3150 rpm
75 mph= 3600 rpm
100 mph= 4800 rpm
3.11 gears 26" tire
55 mph= 2200 rpm
65 mph= 2600 rpm
75 mph= 3000 rpm
100 mph= 4025 rpm
3.51 gears 26" tire
55 mph= 2500 rpm
65 mph= 2925 rpm
75 mph= 3400 rpm
100 mph= 4550 rpm
i don't know that i would want to go as low as 3.11. that will hurt performance in a big way. in both spool and accel. a 3.5x gear really doesn't show itself until the higher speeds. down low it is fairly comparable. at highway speed you will see a couple hundred rpm difference. if you ran a 27" tire w/ the 3.51 gears it would help knock off another 100-200 rpm at 75-100mph.
also keep in mind the converter will play some role in rpm as well. a really loose converter (high stall) will typically have slightly higher rpm than a tighter one.
and jeff, i DO work on my car! well, atleast when the stars are aligned.
I demand updates...........actually I'm requesting them very nicely...........:biglaugh:
Dave, I talked with Jeff @ Jawsgears and they offer a 3.59 and it won't be available for about three more months. You have to order one and when he makes his run, he makes them for whomever is on the list. They cost about $250.00. I just thought I'd let you know.
Dave, I talked with Jeff @ Jawsgears and they offer a 3.59 and it won't be available for about three more months. You have to order one and when he makes his run, he makes them for whomever is on the list. They cost about $250.00. I just thought I'd let you know.
