I need a diff. Actually, just the housing, so I can swap mine. Give me a price shipped to 14610.

 

Then his ratios are closer to the 6-speed than they are to the 5-speed.

 

Actually not....percent differences below

Stock 5 speed 3.63 Wide Close
1st 3.163 42.8 18.93939394 25.69444444
2nd 1.888 71.7 11.48148148 17.86941581
3rd 1.333 101.5 4.245283019 6.966086159
4th 1 135.3 0 0
5th 0.814 166.3 2.406103286 8.268229167
6th -- --

Quaife Wide 3.63
1st 2.564 52.8
2nd 1.67 81
3rd 1.277 106
4th 1 135.3
5th 0.794 170.4
6th -- --

Quaife Close 3.63
1st 2.35 57.6
2nd 1.55 87.3
3rd 1.24 109.1
4th 1 135.3
5th 0.881 153.6
6th -- --

6 speed 3.63
1st 3.76 36 31.81818182 37.5
2nd 2.269 59.6 26.41975309 31.72966781
3rd 1.645 82.3 22.35849057 24.56461962
4th 1.257 107.7 20.39911308 20.39911308
5th 1 135.3 20.59859155 11.9140625
6th 0.843 160.5 #VALUE! #VALUE!

Cliff notes: average % differences

5 speed to quaife close: 7.414452345
5 speed to quaife wide: 11.75963512
6 speed to quaife close: 24.31882602
6 speed to quaife wide: 25.2214926

 

I've been to the other side of 7000 RPM in 6th on the front straight of Pacific with the 3.63 but it takes over 300 RWHP to do it.

It is interesting driving the Pro3 car in that the car seems to be faster around the track with gearing such that it will probably hit the rev limiter on the front straight but you get better 4th gear rev range for linking turns 3 through 7.

Bob

 

Quaife close or maybe wide with a 3:63 looks intriguing for a track only setup on a high power car. 1st and second gear seems like it would be ridiculously high for anything resembling street driving.

Bob

 

Thats what I've got. Although I do plan to do some street driving I dont think it will be terribly difficult from a launch as I can start my 116 hp beater in second with little hesitation(4.1 rear) and 1st gear in the quaife set is basically a second with a stock 5 speed setup. Also, considering I will street driving with a ~350 whp tune, 1.9L motor, it should provide a few extra ft lbs down low

 

Tell us more about the 500hp 5-speed with the 3.63. Seriiously, we want to hear about it.

Edit:
Does teh Quaife accept your magical Penrose fulcrum adapter?

 

Why are you going to run a 350whp street tune and a 500whp track tune? Why not run one, single tune and a boost controller? What are you going to tune differently at those power levels?

 

Thats basically what it will be, one tune, flip a switch and the boost rises, power rises <----(me and your mom)

 

Actually, it is - you just don't realize it.

These are organized from the closest to the furthest away from the 6-speed ratios, based on percentage difference from the 6-speed ratio.

• Stock 6-speed 2nd gear - 2.269 - 0%
• Quaife Close-ratio 1st gear - 2.350 - 3.6% shorter
• Quaife Wide-ratio 1st gear - 2.564 - 13% shorter

• Stock 6-speed 3rd gear - 1.645
• Quaife Wide-ratio 2nd gear - 1.670 - 2% shorter
• Quaife Close-ratio 2nd gear - 1.550 - 6% taller

• Stock 6-speed 4th gear - 1.257
• Quaife Close-ratio 3rd gear - 1.240 - 1% taller
• Quaife Wide-ratio 3rd gear- 1.277 - 2% shorter

• Stock 6-speed 5th gear - 1.0 - same as 4th in the 5-speeds

• Stock 6-speed 6th gear - 0.843
• Quaife Close-ratio 5th gear - 0.881 - 5% shorter
• Quaife wide-ratio 5th gear - 0.794 - 6% taller

If you have the close-ratio box, you basically just have a 6-speed with no 1st gear. If you have the wide-ratio box, it's a little different, but still not closer to the 5-speed overall.

To prove my point, let's look at the 5-speed ratios. The percentages here are referenced from the 5-speed ratio.

• Stock 5-speed 1st gear - 3.163 - 0%
• Quaife Wide-ratio 1st gear - 2.564 - 19% taller
• Quaife Close-ratio 1st gear - 2.350 - 26% taller

• Stock 5-speed 2nd gear - 1.888
• Quaife Wide-ratio 2nd gear - 1.670 - 12% taller
• Quaife Close-ratio 2nd gear - 1.550 - 18% taller

• Stock 5-speed 3rd gear - 1.333
• Quaife Wide-ratio 3rd gear - 1.277 - 4% taller
• Quaife Close-ratio 3rd gear- 1.240 - 7% shorter

• Stock 5-speed 4th gear - 1.0 - same as 4th in the Quaifes

• Stock 5-speed 5th gear - 0.814
• Quaife Wide-ratio 5th gear - 0.794 - 2% taller
• Quaife Close-ratio 5th gear - 0.881 - 8% shorter

The only point at which the factory 5-speed gets closer than the 6-speed to EITHER Quaife box is in top gear, where the Quaife Wide's 5th gear is closer to the 5-speed than it is to the 6-speed. In every other gear, the 6-speed's ratios are closer.

 

Organized another way:

Quaife Close-ratio (percentages referenced from Quaife-Close):

• 1st gear - 2.350
• 6-speed - 2.269 - 3% taller
• 5-speed - 3.163 - 35% shorter

• 2nd gear - 1.55
• 6-speed - 1.645 - 6% shorter
• 5-speed - 1.888 - 22% shorter

• 3rd gear - 1.240
• 6-speed - 1.257 - 1% shorter
• 5-speed - 1.333 - 7.5% shorter

• 4th gear - 1.000

• 5th gear - 0.881
• 6-speed - 0.843 - 4% taller
• 5-speed - 0.814 - 8% taller

Quaife Wide-Ratio (referenced from Quaife Wide):

• 1st gear - 2.564
• 6-speed - 2.269 - 12% taller
• 5-speed - 3.163 - 23% shorter

• 2nd gear - 1.670
• 6-speed - 1.645 - 1% taller
• 5-speed - 1.888 - 13% shorter

• 3rd gear - 1.277
• 6-speed - 1.257 - 2% taller
• 5-speed - 1.333 - 4% shorter

• 4th gear - 1.000

• 5th gear - 0.794
• 5-speed - 0.814 - 3% shorter
• 6-speed - 0.843 - 6% shorter

 

People who complain about 6-speed gearing and then buy a Quaife gearbox "because the gearing is better" are the literal definition of an uninformed buyer.

 

I havent done the math but looks to be 100% correct. Only thing is you did not reference the rear end ratio and that should be part of the equation when you're looking at the actual output differences.

 

I never complained about the gearing. I just wanted something bulletproof and geared for top end acceleration.

 

Ok , I agree with this. Someone build me a smooth shifting(as 5 speed), bulletproof 6 speed, and I'll give my Quaife away

 

No. The rear end ratio is a constant.

 

Independent too.