FWIW,
I got the Exedy, 4.235 R&P, and the short gears installed on my '91. The car's been in the shop for almost two weeks and cost me more than a grand but it's finally back. Boy, was I antsy. Haven't driven it much (from the shop to my home) but here are my thoughts about the difference so far. Oh, in addition, my mechanic built the diff with a 105lb (measured) diff preset torque.
Short gears and R&P:Enough of a difference to notice but overall I'm not that impressed. Perhaps with a little bit more seat time? Shifts are obviously much sooner and 1st to 2nd is at a much better RPM. Did some heel and toeing and noticed it seemed a little more difficult which is the opposite of what I expected. Acceleration seems better all the way up to 4th gear. It's better but not "whoa." Although I'm thinking this tranny is going to be great for my local track. It's a good mod but I'm thinking the grand would have been better spent on saving for a supercharger.
Clutch: Whoa...cool clutch my friends. This thing grabs like a mofo. I went from a stock clutch to a Dali clutch to the Exedy. And the difference in the way the Exedy grabs is like night and day, like a Democrat to a Republican, like Schumacher to Verstappen, like...well, you get my point. It grabs so well that I noticed that the clutch is the reason (sans my two left feet) that heel and toeing is more difficult. The rev match has to be perfect b/c this bad boy is not going to slip. Re the infamous clutch chatter: Not that big of a deal to me and most of it is drowned out by my exhaust anyway (which I think is too quiet anyway). And if it's gets annoying, just remind yourself not to ride the clutch anyway. So no big deal. Re the small sweet spot: whoa...understatement of the year. Haven't stalled it (ok, maybe once
) but it's a little more difficult to get used to than the Dali clutch. But I'm confident that a little more seat time will alleviate this problem. Too quick a start and I'll chirp my 285 wide S0-3's. Yeah, way cool. 
Oh, and peddle pressure is not that much different from stock. A little heavier (fractionally) but certainly not enough to build up your left quad.
Overall, I'm REALLY happy with the car now and only have three more mods, and a few years, before I contemplate forced induction. I have an NSX drive touring Southeast Oklahoma this weekend and a drag race event in early November and I'll report any changes in my very limited first impression opinion.
I got the Exedy, 4.235 R&P, and the short gears installed on my '91. The car's been in the shop for almost two weeks and cost me more than a grand but it's finally back. Boy, was I antsy. Haven't driven it much (from the shop to my home) but here are my thoughts about the difference so far. Oh, in addition, my mechanic built the diff with a 105lb (measured) diff preset torque.
Short gears and R&P:Enough of a difference to notice but overall I'm not that impressed. Perhaps with a little bit more seat time? Shifts are obviously much sooner and 1st to 2nd is at a much better RPM. Did some heel and toeing and noticed it seemed a little more difficult which is the opposite of what I expected. Acceleration seems better all the way up to 4th gear. It's better but not "whoa." Although I'm thinking this tranny is going to be great for my local track. It's a good mod but I'm thinking the grand would have been better spent on saving for a supercharger.
Clutch: Whoa...cool clutch my friends. This thing grabs like a mofo. I went from a stock clutch to a Dali clutch to the Exedy. And the difference in the way the Exedy grabs is like night and day, like a Democrat to a Republican, like Schumacher to Verstappen, like...well, you get my point. It grabs so well that I noticed that the clutch is the reason (sans my two left feet) that heel and toeing is more difficult. The rev match has to be perfect b/c this bad boy is not going to slip. Re the infamous clutch chatter: Not that big of a deal to me and most of it is drowned out by my exhaust anyway (which I think is too quiet anyway). And if it's gets annoying, just remind yourself not to ride the clutch anyway. So no big deal. Re the small sweet spot: whoa...understatement of the year. Haven't stalled it (ok, maybe once
) but it's a little more difficult to get used to than the Dali clutch. But I'm confident that a little more seat time will alleviate this problem. Too quick a start and I'll chirp my 285 wide S0-3's. Yeah, way cool. Oh, and peddle pressure is not that much different from stock. A little heavier (fractionally) but certainly not enough to build up your left quad.Overall, I'm REALLY happy with the car now and only have three more mods, and a few years, before I contemplate forced induction. I have an NSX drive touring Southeast Oklahoma this weekend and a drag race event in early November and I'll report any changes in my very limited first impression opinion.
) F1 driver, I expect nothing less than a personal invation by him to drive a F1 car myself, whereas I will show the young man how a F1 car needs to be driven !! 
