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It likely just means an extra shift to hit 60mph but having the extra gear will give you a higher top speed? None of that is particularly beneficial for a street car. Now if you are doing the Texas Mile and have 500whp, sure, go for it hehe.
 

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Drew In Houston
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I've spent some time thinking about this over the years and have been watching that ebay post, haven't done it though. I'd like the taller 1st gear for sure, but for a road car it'd be great to have a nice overdrive gear, these sets don't have that, 6th is shorter than our stock 5th--0.704 compared to 0.660 respectively.

So the stock 5th with the 4.05 final drive is almost the same as the Quaife 6th with a 3.820 final.

Here's how the ground speed works out with a 225/45/17 tire (24.97 in diameter)

edit: Reviewing my numbers these graphics are a 3.820 final drive for the Quaife compared to a stock 4.050 for a Viggen or 9-5, so it's not apples to apples exactly:





I've been thinking about maybe going to the 3.820 final drive with one of these, but then the taller 1st might get out of hand with an aggressive clutch... I think if someone's running a large frame turbo with a narrow power band it might make sense to lay out the cash to do it. You're still going to need 4 gears for a quarter mile too.

There was also a straight cut Quaife gear set that had different ratios, but I haven't seen one of those sets for sale anywhere in a few years.
 

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Drew In Houston
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Actually, the upgrade that I've been thinking about most recently since putting my Viggen back on the road is moving to a cable shift like the Cobalt/Ion to minimize disturbance to shifting during hard on/off throttle transitions. The only instance I know of that was Yankton's 900 show car like 10(?) years ago or so.
 

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Discussion Starter · #6 ·
Actually, the upgrade that I've been thinking about most recently since putting my Viggen back on the road is moving to a cable shift like the Cobalt/Ion to minimize disturbance to shifting during hard on/off throttle transitions. The only instance I know of that was Yankton's 900 show car like 10(?) years ago or so.
It was just something I saw, not really going to consider it (unless maybe my trans goes and I do some drunk ebay shopping ) but like you are saying I think you would need to put in a larger 1st and 6th
 
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