Maximum Speed
Melting Slicks
Joined: Sep 2000
Posts: 3,040
Likes: 0
From: North Liberty IA
St. Jude Donor '07
Just curious -- is there a spot in your daily commute where being able to go 217mph would benefit you rather than being limited to 186mph?
Unless your commute involves a pretty high banked track, I can't imagine this is really a problem
Unless your commute involves a pretty high banked track, I can't imagine this is really a problem
Melting Slicks
Joined: Sep 2000
Posts: 3,040
Likes: 0
From: North Liberty IA
St. Jude Donor '07
i took my c6 out on a run with some local motorcyle friends and on a local bridge i hit 186mph according to the HUD..... and the car was still pulling pretty good considering the gear/speed..... wouldnt try it again on local roads because afterwords when i was swapping my street tires for my drag radials i noticed blistering and patches of rubber missing from my street tires 
Stop doing this on the street. The person you kill will be someone else.
Le Mans Master
Joined: Jul 2005
Posts: 5,328
Likes: 405
I'm glad you find it useful. There's an update here -- http://bolero.csustan.edu/C6/C6_Gears.xls -- with a built-in tire diameter calculation. I added a ZR1 and my A6 w/Kumho 710s also.
--Dan
--Dan
PS The ZR1 5th gear is incorrect, it's suppose to be .75.
Melting Slicks
Joined: May 2006
Posts: 2,891
Likes: 1
From: NJ..."the way I saw it, everyone takes a beating sometimes."
4. Yes, go for it and stop worrying about top end...not many places to do it and not many races go past 170 MPH and that's a place for fools anyway. At 180 MPH, it'll take you 1100 ft to come to a stop and that's if everything works right...think about it for a minute. Almost the length of a drag strip and even at the half way mark (550 FT) you're still going over 120 MPH.
I'm not going to preach but this is porbably one of the most sensible statements ever posted on this forum. Do what you want just take this into consideration....seriously. Stop, sit down, and actually think about the reality of this.
Ok, you may continue.
Thread Starter
Pro
Joined: May 2007
Posts: 585
Likes: 0
From: Ocean County NJ
Guys, slow down with the preaching. Who ever suggested that anyone would attempt maximum speed on public roads? I am a former municipal prosecutor and certainly know that this would be a foolish act on the public roads. I was merely asking a question about gear ratios and theoretical, gear limited, top speeds. As for the location of my speeding, I happen to have a direct tie in to someone that owns a major racing venue and, as such, I have the ability to go out on a private test day and have some fun if I was so inclined. Thanks for the info. I had heard that the swap to 4:10s would severely limit top end but, from what has been posted, the rumor is incorrect. 177, 186, 194 mph, what's the real difference? I think I'll just go order my gears now.
Melting Slicks
Joined: Nov 2005
Posts: 2,345
Likes: 2
From: Houston 06 C6 Ysi SC 402 fgd TX
I have a little more HP than you, The 4.10's are great for street.
FYI, I got into the "legal" speed events, etc. mostly 60-130. I have found that my set-up to get to 130 from 3rd at 58mph with one shift at 4th has been elusive. I have had to shift to 5th which with my shifting slows me down
.
I got the 30x345s with 27.17 dia. upped my rev limiter to 6800 and bumped it in 4th at 128.5 mph.... I'm at 430hp now with a flat hp curve at 5700 on up. when I add the ported FAST and 97 octane and tune for it, the extra HP "should" get me there.
FYI, I got into the "legal" speed events, etc. mostly 60-130. I have found that my set-up to get to 130 from 3rd at 58mph with one shift at 4th has been elusive. I have had to shift to 5th which with my shifting slows me down
. I got the 30x345s with 27.17 dia. upped my rev limiter to 6800 and bumped it in 4th at 128.5 mph.... I'm at 430hp now with a flat hp curve at 5700 on up. when I add the ported FAST and 97 octane and tune for it, the extra HP "should" get me there.
Le Mans Master
Joined: Jul 2005
Posts: 5,328
Likes: 405
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