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Old 11-21-2011, 08:08 PM   #15 (permalink)
tranceformer
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Join Date: Nov 2008
Location: Palm Beach, FL
Posts: 1,213
Drives: 2009 370Z PW 6MT
Rep Power: 267
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Quote:
Originally Posted by omg35s View Post
How much do the 4.08 gears cost with installation? How much will my 1/4 mile improve by? How much MPG will I be losing if I'm cruising on the highway?
The price depends if you end up buying all the bearings & seals etc with the gears. I've seen the gears go for $500 alone, and I've seen full install kits go for up to $900. Installation would probably be a few hundred bucks.

1/4 mile time improvement? After 2 nights at the track w/ the 4.08's, I haven't been able to beat my previous best of 12.89 @ 107 yet. Still figuring out how to launch the car with the gears, tires and alignment.

MPG loss on the highway? I went on a roadtrip as soon as I got the gears done. I averaged 22.9 MPG over the 400 miles, mostly 70mph driving. Usually I can average 24 to 25 MPG driving 70+ mph. So yes, you lose a few MPG's on the highway. How much exactly depends on your driving habits.
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2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires
official 1/4 mile track times
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