Re: Ultimate Transmission??? (oneflygti)
I have the Quaife 6 speed w/ the ATB diff. The 6th gear is a .795. The OEM 5th is a .80. I understand that Quaife may have changed the final drive to the .80 in the new kits, but I haven't heard for sure. So, if you put in the 4.24 final drive, you will be turning the around the same RPM with the 5 or 6 speed in the final gear with either gear set. This being the case, I don't recommend the 4.24 final drive at all unless you plan on running your VR at the track only, and it better be a short track, like the Streets of Willow. If have no intention of going w/ forced induction, I say used the 3.64 or if you really want neck snapping acceleration, the 3.94. If you are going to go with forced induction in the future, use the OEM final drive, you will be glad you did, especially if you drag or road race your VR. The first gear in the Quaife will get you right around 50 mph @ 7000 RPM. From there, the drop between shifts is around 1500 to 1400 RPMs. For people with centrifugal chargers this means that boost doesn't drop off much at all. I will tell you that driving the Quaife 6 speed from a stop with the OEM final drive makes for lack luster throttle tip in response. I feels like you're down a couple cylinders, but once your over 2000 rpm, it's all good. It's kinda cool to launch @ 5000 rpm with a clutch drop and getting controllable wheel spin. I found that I was able to modulate the throttle much better with the taller first gear to minimize wheel spin and get good launches consistently. Also, on the OEM tranny, when you are going into a tight reducing radius corner that is a bit too tall for 2nd and a bit too short for 1st, the Quaife tranny's 1st gear actually becomes the perfect middle ground. I drop it into 1st and still have 2000 rpms to play with. I recommend driving a VR with a Quaife tranny installed to see if it's to your liking. One of my long time customers just picked up one from me after driving mine, and he swears that it is actually easier to shift than the OEM set-up. I can't tell the difference in my tranny.
Hope this helps