top speed
Race Director
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From: Cold Hell, Minnesota...for now
St. Jude Donor '15 thru '26
Former Vendor
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From: League City Texas
Houston Events Coordinator
St. Jude Donor '11-'12, '14
I believe in the Beer Fairy
Burning Brakes
Joined: Aug 2007
Posts: 1,131
Likes: 162
From: Woodstock Ontario
Talked to a GM engineer and asked him what the top speed is on my GS 436 hp. auto. He said under ideal conditions would be 182 for the conv. and 188 for the coupe but it would take a good distance to achieve that.
Burning Brakes
Joined: Feb 2005
Posts: 1,113
Likes: 8
From: Whitehall PA
Since this was done during testing, they may have removed (or not yet installed) any limiter, so we can't be sure.
There was a long thread about this a few months ago, couple of people showed readouts of the factory tune and there was a limiter installed, i don't remember if it was 186 but it was right around there.
Someone asked if the limiter was truely "enabled"; one member had wondered the same thing and during tune experiments, set his limiter to something like 30 mph. Sure enough, the car would not go faster.
Since the LS3 base cars seem about 5 mph faster, any limiter may have been set slightly higher. I think the tires have also bee uprated from "186 mph" to "greater than 186", but not specified how high.
For most of us, experiments are hard to do...
There was a long thread about this a few months ago, couple of people showed readouts of the factory tune and there was a limiter installed, i don't remember if it was 186 but it was right around there.
Someone asked if the limiter was truely "enabled"; one member had wondered the same thing and during tune experiments, set his limiter to something like 30 mph. Sure enough, the car would not go faster.
Since the LS3 base cars seem about 5 mph faster, any limiter may have been set slightly higher. I think the tires have also bee uprated from "186 mph" to "greater than 186", but not specified how high.
For most of us, experiments are hard to do...
Drifting
Joined: Jul 2011
Posts: 1,694
Likes: 177
From: DFW Area Texas
The top speed questions (especially the "where to run legally?") got my little brain going...I remembered reading about the Callaway Sledgehammer years ago, and it's tested top speed of 254.76 mph, driven by John Lingenfelter (http://en.wikipedia.org/wiki/Callawa...ammer_Corvette).
According to wikipedia, here is here they did it: http://www.trcpg.com/facility75testtrack.asp
Anyone up for a track day?
I know, I'm sure we couldn't afford it!
According to wikipedia, here is here they did it: http://www.trcpg.com/facility75testtrack.asp
Anyone up for a track day?
I know, I'm sure we couldn't afford it!
Melting Slicks
Joined: Nov 2007
Posts: 3,365
Likes: 1
From: Oklahoma City
GM likely hit their top speed mark(s) under ideal conditions. Individual results may vary. The following chart is probably a good 'general' guide:
ENGINE<------Vehicle_Speed------------>
RPM...1ST...2ND...3RD...4TH...5TH...6TH
1000....8....13....20....27....37....47
1500...12....20....31....41....55....70
2000...16....26....41....43....73....93
2500...20....33....51....68....92...116
3000...23....40....61....81...110...140
3500...27....46....71....95...128...163
4000...31....53....82...109...147...186
4500...35....60....92...122...165...186
5000...39....66...102...136...184...186
5500...43....73...112...149...186...186
6000...47....79...122...163...186...186
6500...50....86...133...176...186...186
ENGINE<------Vehicle_Speed------------>
RPM...1ST...2ND...3RD...4TH...5TH...6TH
1000....8....13....20....27....37....47
1500...12....20....31....41....55....70
2000...16....26....41....43....73....93
2500...20....33....51....68....92...116
3000...23....40....61....81...110...140
3500...27....46....71....95...128...163
4000...31....53....82...109...147...186
4500...35....60....92...122...165...186
5000...39....66...102...136...184...186
5500...43....73...112...149...186...186
6000...47....79...122...163...186...186
6500...50....86...133...176...186...186
maybe I'm confusing speed with HP, gear-wise....
Last edited by Leprkon; Jul 26, 2011 at 07:50 PM.
Le Mans Master
Joined: Nov 2005
Posts: 8,214
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Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
The top speed questions (especially the "where to run legally?") got my little brain going...I remembered reading about the Callaway Sledgehammer years ago, and it's tested top speed of 254.76 mph, driven by John Lingenfelter (http://en.wikipedia.org/wiki/Callawa...ammer_Corvette).
According to wikipedia, here is here they did it: http://www.trcpg.com/facility75testtrack.asp
Anyone up for a track day?
I know, I'm sure we couldn't afford it!
According to wikipedia, here is here they did it: http://www.trcpg.com/facility75testtrack.asp
Anyone up for a track day?
I know, I'm sure we couldn't afford it!
I would love to try and see if I could hit 190+ on that 7.5 mile track. While the mile drag strips are great, there is also tons of fun hanging it out in the high banked turns on a oval.
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Melting Slicks
Joined: Dec 2009
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From: Smallingerland Friesland, Netherlands
Team Owner
Joined: Sep 2000
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
More like two guys trying to figure out what the truth really is.
Some limiters are said to be very obvious, others are claimed to be so subtle you don't really notice them. So if I find a place to run my 2009 up to max speed and it hits 187, does that mean it has a limiter or that's the real top speed?
Probably a moot point, my personal max is 165 and finding a place to beat that will be difficult.
Thread Starter
Instructor
Joined: Nov 2008
Posts: 150
Likes: 0
From: jersey shore nj
top speed
it was a question and im kinda sorry i even asked it afterall this bs did not think it would turn out to b a mine is better than urs post ok guess i found out the top speed the hard way
can bet ur vette's this wont happen again.
can bet ur vette's this wont happen again.
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
I have a way to solve this lets all go the the texas mile and see what are cars can do in the mile. This is a pointless argument almost as good as which is faster a black vette or a red one. I do not bench race so for a few weeks until my grand sport is finished I will not add any comments about what my car will do. all I will say is Oct is coming and I will be there.....
John
John
It is a good event to watch.
Burning Brakes
Joined: Mar 2008
Posts: 995
Likes: 24
From: Las Vegas NV
Interesting posts...I'm not a "car' guy so when folks ask what size engine; how fast does it go; and want to discuss cold air intakes and tunes and tires...I just give them the deer in the headlight look. I luv my vette but all mods and my attraction to this car were strictly for appearance. But thanks for the info...CF does get me some amount of credibility!!
Le Mans Master
Joined: Oct 2006
Posts: 5,078
Likes: 19
From: Cumming, GA
I see a bunch of sideline speculation in here. 
I've run my 2006 H/C LS2 at the mile and hit the 186mph speed limiter. I've been told by LS3 owners their limiter is higher but have never seen the field in the tune myself. I have since upped my limiter to Z06 speed (205mph) so I won't have that issue next time out.
On the day of my mile run I was hitting the 186 limiter well before the 1-mile mark while a bolt-on, lighter, C6Z was only running 177mph all the way through the mile. The wider body clearly hurts at those kindof speeds as we made almost identical hp and he was 50-75lbs lighter than me if I had to guess.
Regarding the mirrors a few guys thought folding the mirrors would help but all said at @150mph the mirrors popped back out into place so the assumptions made here are false about that being an aid in aero.
The above are real world facts gained from experience not speculation.
I've run my 2006 H/C LS2 at the mile and hit the 186mph speed limiter. I've been told by LS3 owners their limiter is higher but have never seen the field in the tune myself. I have since upped my limiter to Z06 speed (205mph) so I won't have that issue next time out.
On the day of my mile run I was hitting the 186 limiter well before the 1-mile mark while a bolt-on, lighter, C6Z was only running 177mph all the way through the mile. The wider body clearly hurts at those kindof speeds as we made almost identical hp and he was 50-75lbs lighter than me if I had to guess.
Regarding the mirrors a few guys thought folding the mirrors would help but all said at @150mph the mirrors popped back out into place so the assumptions made here are false about that being an aid in aero.
The above are real world facts gained from experience not speculation.
