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[Z06] Z06 top Speed???

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Old May 4, 2004 | 05:01 PM
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Default Z06 top Speed???

I read in a few magazines that it is like 173. I don't understand this. I read in another magazine a LS1 vette topped out at 172. The Z has about 60 more RWHP so I would think it should be able to get to about 180 or so. I know a ZR1 can go over 180, so why can a Z06 hit at least 180? Is it the aerodynamics or the gearing? I also read that a LT1 Vette can go 172 and those have about 275 RWHP. Anyone have a clue??? :confused:
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Old May 4, 2004 | 05:23 PM
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Default Re: Z06 top Speed??? (bics56)

28mpg highway is why. 6th gear became a pure economy gear not a performance gear of any kind. The theoretical limit of 6th gear is something like 260mph. That means when you shift from redline in 5th (172mph) to 6th the rpm's drop so far bellow the power band that the engine can't pull the car back into its power range and as a result the car does not continue to accelerate. Had 5th gear gone to 155-160 and 6th gear gone to 200-205 the z06 would have come damn close to hitting 200mph.
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Old May 4, 2004 | 06:43 PM
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Default Re: Z06 top Speed??? (Z06Kal)

Had 5th gear gone to 155-160 and 6th gear gone to 200-205 the z06 would have come damn close to hitting 200mph.
I bet 185 mph is more reallistic with the stock 360 RWHP. The Z06 is not quite as aerodynamic as the coupe either. But no doubt some of the meaner H/C cars could hit 200 with gearing like that.

The stock gearing of the Z06 is tough to fault overall. There is a BIG difference in the way the Z06 hits 172 mph or whatever quickly compared to a '03 Cobra slowly clawing its way up to 170 mph at best in its tall 5th gear. The Stang would have better high speed performance with a lower 5th but a little less bragging rights for the car magazines.




[Modified by BoostManiac, 2:36 PM 5/5/2004]
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Old May 4, 2004 | 10:01 PM
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Default Re: Z06 top Speed??? (bics56)

I was reading some magazine (forget which) about someone's turboed Z06 that had the hp to get way past 172 but he was blowing out the transmission. I think I remember it saying he peged the speedometer. The article said that 6th gear could do the speed with enough hp behind it but it or the transmission case couldn't take the stress of pushing the car into the wind at some point.
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Old May 4, 2004 | 10:03 PM
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Default Re: Z06 top Speed??? (bics56)

Mine did 179mph downhill :yesnod: :) legally!

Bottom line: top speed is horse power vs. aerodynamics.


[Modified by CPT Z06, 10:04 PM 5/4/2004]
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Old May 5, 2004 | 12:52 PM
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Default Re: Z06 top Speed??? (Sandy S)

I was reading some magazine (forget which) about someone's turboed Z06 that had the hp to get way past 172 but he was blowing out the transmission. I think I remember it saying he peged the speedometer. The article said that 6th gear could do the speed with enough hp behind it but it or the transmission case couldn't take the stress of pushing the car into the wind at some point.
I'd be interested in which magazine. The only one that I saw actually test top speed was Road & Track. They found that top speed was reached in 5th, and the upshift to 6th dropped it so far out of the power band that the car slowed down (as was noted above). The transmission is plenty strong, but the gearing is not appropriate for the absolute best top speed.

Still, with the aerodynamics being what they are, not much more can be gained.
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Old May 5, 2004 | 01:54 PM
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Default Re: Z06 top Speed??? (bics56)

the z06 is drag limited on top speed, there is no way a stock z06 is going to get close to 200 mph.

see: http://www.lingenfelter.com/nov98.asp

read how mario wrecks engine after engine in very expensive cars right in front of their owners!

he does 2 vipers in a row! he da man!
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Old May 5, 2004 | 02:59 PM
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Default Re: Z06 top Speed??? (Sandy S)

I was reading some magazine (forget which) about someone's turboed Z06 that had the hp to get way past 172 but he was blowing out the transmission. I think I remember it saying he peged the speedometer. The article said that 6th gear could do the speed with enough hp behind it but it or the transmission case couldn't take the stress of pushing the car into the wind at some point.
I believe the magazine you are referring to is the January 2004 issue of Corvette magazine...Sorry, I don't have a scanner. I had to take a picture of the cover and page instead. http://temp.corvetteforum.net/c4/nat96lt4//cover.jpg http://temp.corvetteforum.net/c4/nat96lt4//page.jpg


[Modified by Nat04Z06, 3:02 PM 5/5/2004]
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Old May 5, 2004 | 03:36 PM
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Default Re: Z06 top Speed??? (Sandra Bigwoode)

the z06 is drag limited on top speed, there is no way a stock z06 is going to get close to 200 mph.

see: http://www.lingenfelter.com/nov98.asp

read how mario wrecks engine after engine in very expensive cars right in front of their owners!

he does 2 vipers in a row! he da man!
Excellent article, I have the original R&T top speed mag test, that was a classic on state of the art tuner technology, although I was disappointed they tested such a mild 420 crank HP Supra considering what was available even back then. :confused: Oh well.

It's worth noting that it has been proven that banked ovals kill 2-3 mph top speed also, so those speeds could all be increased slightly with a flat stretch of highway. :cheers: :auto:
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Old May 6, 2004 | 10:17 PM
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Default Re: Z06 top Speed??? (Nat04Z06)

I was reading some magazine (forget which) about someone's turboed Z06 that had the hp to get way past 172 but he was blowing out the transmission. I think I remember it saying he peged the speedometer. The article said that 6th gear could do the speed with enough hp behind it but it or the transmission case couldn't take the stress of pushing the car into the wind at some point.

I believe the magazine you are referring to is the January 2004 issue of Corvette magazine...Sorry, I don't have a scanner. I had to take a picture of the cover and page instead. http://temp.corvetteforum.net/c4/nat96lt4//cover.jpg http://temp.corvetteforum.net/c4/nat96lt4//page.jpg


[Modified by Nat04Z06, 3:02 PM 5/5/2004]
That was the one I was thinking about. Thanks very much for finding and posting it.
:cheers:
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Old May 7, 2004 | 04:31 PM
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Default Re: Z06 top Speed??? (Sandy S)

i want to destroy vipers too, so long as they're not mine, how do i get that job?
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