3.9 final drive.................update
#21
any idea what the raised rpm's would be (at say, 60mph in 6th gear)???
a couple hundred higher, or 1K higher???
i still like this idea, even if its more shifts down the ¼ (which im not doin anyway)
a couple hundred higher, or 1K higher???
i still like this idea, even if its more shifts down the ¼ (which im not doin anyway)
#23
Its in this forums archives somewhere. Gas mileage wast effected that much either. Right now I have techno reflash, 350EVO t body,Injen CAI and Injen exhaust and I am at 20.3. I wanna say I was at 19.8 with the final drive but I cannot remember for sure. Looking back at some of the data from our race car when we tested it out....you def rev throught the gears faster.
#35
This is more of a mod for road courses and tracks. It's not a great mod for the 1/4 mile, or for daily driving. It's a fairly cheap acceleration mod, but I think $900 is not worth it if you just want to make your car faster for no special reason. Obviously if you track your Z, go for it.
0-60 times are not going to really improve because of lack of traction Of course a new LSD and some slicks would help that.
0-60 times are not going to really improve because of lack of traction Of course a new LSD and some slicks would help that.
#36
Originally posted by xswl0931
If someone decides to get this installed, please try and get 0-60 and 1/4 times before and after.
If someone decides to get this installed, please try and get 0-60 and 1/4 times before and after.
#37
I would say 3rd through 6th will have more of an impact with this modification that 1st through 3rd. On road courses it will help do away with going down to second or being caught between 2nd and 3rd gear. Third will accel much better.
#38
Originally posted by mlemieux137
what type of power gains are we going to see off this?...how much is an install going to be?....how much are these gears going to lower our top speed...and finally...knowing that my friend changed his stock mustang gt gears to 3.73's and then had to get a chip to recailbrate his speedo...then blew his tranny. what are the chances of this messing up the Z? thanks
what type of power gains are we going to see off this?...how much is an install going to be?....how much are these gears going to lower our top speed...and finally...knowing that my friend changed his stock mustang gt gears to 3.73's and then had to get a chip to recailbrate his speedo...then blew his tranny. what are the chances of this messing up the Z? thanks
OTOH, speed at redline in each gear will be 11.4% lower. That'll make our already ridiculously low first gear even more useless, though it will make second a better "first" gear. As far as top speed is concerned, that'll still be over 140 MPH at redline, and that's plenty fast enough for all but the longest tracks.
Changing the final drive won't affect the speedometer on our cars since that's derived from wheel sensors. The load on the tranny at any given speed will actually be the same or lower, depending on how hard you press the loud pedal. But the torque our half shafts will see will be higher. On a highly modified car, this could lead to twisted or broken axles. Gas mileage will be hurt when driving "economy" style, you can forget about seeing 27 MPG. But if you drive enthusiastically anyway, there probably won't be much of a change.
#40
It does make good since to upgrade the LSD to the NISMO LSD while you have the differential down and add the 3.9 final drive. My question is does anybody have a sound clip of the Nismo LSD making the poping sound. I have never heard one and wondering if its streetable(ie daily driving) or just track worthy.