Z51 Performance increase?
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Joined: Apr 2003
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From: IL
Z51 Performance increase?
I am a bit confused. I have been trolling around looking at how I am going to order m next vette and I seem to be seeing that the Z51 performance increase is only on the A4 tranny since they change the gearing but not with the MN6 (retains its 3.42) I guess my question is, what is the performance difference between mn6 and a4 with and w/o the z51 package?
Thanks
Thanks
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Joined: May 2004
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St. Jude Donor '21-'22-'23-'24
With the auto tranny, the Z51 gets the 3.15 rear axle instead of the 2.73, but the gear ratios stay the same.
With the manual tranny, when you add the Z51, the rear axle is the same (3.42), but the gear ratios change for the first 3 gears.
As a result, for the 0-60 times, the GM estimates are 4.1 sec for the manual w Z51, 4.3 for manual w/o Z51, 4.5 for auto w Z51, 4.6 for auto w/o Z51.
With the manual tranny, when you add the Z51, the rear axle is the same (3.42), but the gear ratios change for the first 3 gears.
As a result, for the 0-60 times, the GM estimates are 4.1 sec for the manual w Z51, 4.3 for manual w/o Z51, 4.5 for auto w Z51, 4.6 for auto w/o Z51.
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From: IL
Originally Posted by HalM
There's lots of other reasons to pick up the Z51 besides the 0-60 times...
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Joined: Apr 2003
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From: IL
Originally Posted by SilverCoupe
With the auto tranny, the Z51 gets the 3.15 rear axle instead of the 2.73, but the gear ratios stay the same.
With the manual tranny, when you add the Z51, the rear axle is the same (3.42), but the gear ratios change for the first 3 gears.
As a result, for the 0-60 times, the GM estimates are 4.1 sec for the manual w Z51, 4.3 for manual w/o Z51, 4.5 for auto w Z51, 4.6 for auto w/o Z51.
With the manual tranny, when you add the Z51, the rear axle is the same (3.42), but the gear ratios change for the first 3 gears.
As a result, for the 0-60 times, the GM estimates are 4.1 sec for the manual w Z51, 4.3 for manual w/o Z51, 4.5 for auto w Z51, 4.6 for auto w/o Z51.
Thanks for the very clear info! As I just stated, now do I get the Z51 or wait for the big cahuna . . . hmmm, tough one. I think I may have to wait to see the prices!
