SuperHatch wrote:
I would guess your tach is off, there is no way an NA Z is taching 3k @ 90MPH...
Also, the 90-93 Q diff is not a direct swap into the NA cars. The input flange will need to be redrilled for the smaller NA driveshaft bolt pattern, the output flanges will need to be swapped for 90-96 TT output flanges that have the ABS sensors on them, and you will need to swap the rear cover off of your NA diff to keep the ABS sensors. The axles will need to come from the Q as well as the hubs since the Q stuff is all larger and stronger.
If you have a rear diff out of a Q45T I believe you can skip the output flange/rear cover swap as I think they have 4-channel ABS. (Someone more Q saavy will need to back me up on this).
Either way, it would benefit you to put in a TTZ speedo sensor gear, since the 3.69 in the TT is a lot closer to the 3.54 from the Q. You'll still be off, but by way less.
An arguably better option is a rear out of a 97-00 Q45T. They have 4 channel ABS, and they'll bolt right up to the driveshaft and axles that are in your NA Z.
I already have all the pieces together to swap the diff, researched it a month ago or so. Not planning on swapping it though. I agree with the tach being off, but it is accurate down low as I set it while using a snapon programmer the other night. But I am topping it out(redline) at around 6200 on the tach.
I gotta get my consult up, laid the wires seperate, so I can have it in the console hidden and for easy access, when it gets a programmer.
T45, Man, get an engine from salage that you trust, and swap it, It is a good day or 2 worth of work, but then if you must sell it, you can for good money and F that, drive it.
How the twins? Today is my son's first day at school. Miss him, but heck ya! Time to build w/o a 4 yr old. Thank god for school. n blondes, n the VH45.
I have a 95 vette with 90K on it, in superb condition at home, doing PM for its owner, and found last night that the Z is 1 1/2" shorter overall, but over 4" longer in track, widths are within 1/4" front and rear, height is close. After spirited driving in each, I'd rather have the Z45, anyday. the Z32, no, I'd take the vette, but with the V8, the Z45 is a far better car, now I just gotta get the a/c done. Driving it and making the body smooth and ready for paint, is taking longer then expected, so I cant sell it for a month still.
I will get some more vids up soon. Some showing its tame side, and more beasty too. Tring to get funds to get the ECU, cant wait to dyno with it, w/o it, and with it switched But money is short, and paint it gonna eat my lunch.