Disappointing day at track
Thread Starter
Melting Slicks
Joined: Oct 2001
Posts: 2,562
Likes: 162
From: Louisville KY
2020 Corvette of the Year Finalist (performance mods)
C6 of Year Winner (performance mods) 2019
Disappointing day at the track
A few months ago I went to a Wanna Go Fast event. I have a GS Vert with a 650 Hennessy Package, stock 6 speed and Quartermaine Clutch. I've only had the car a year and I have Dynos from the previous owner of around 550 RWHP.
Trying multiple 1/2mile runs I was only able to reach 140MPH.
My question is would this be the normal speed I would achieve for a 1/2 mile run?
Is something wrong with the car?
Or do my driving skills suck that bad?.
One of my thoughts were could I be shifting at the wrong RPM. If I remember correctly I was shifting right before redline.
I was checking the last Dyno sheet and it looked like HP peaked at 5.5K
Should that be where I should have shifted and would it effect my speed that much.
Any Ideas would be appreciated.
Trying multiple 1/2mile runs I was only able to reach 140MPH.
My question is would this be the normal speed I would achieve for a 1/2 mile run?
Is something wrong with the car?
Or do my driving skills suck that bad?.
One of my thoughts were could I be shifting at the wrong RPM. If I remember correctly I was shifting right before redline.
I was checking the last Dyno sheet and it looked like HP peaked at 5.5K
Should that be where I should have shifted and would it effect my speed that much.
Any Ideas would be appreciated.
Last edited by pjazz; May 26, 2017 at 04:31 PM.
Drifting
Joined: Dec 2003
Posts: 1,755
Likes: 88
From: Pearland Texas
shifting doesn't usually play a huge part in these longer distances. But the first three gears I would shift sooner like just past your peak power say 6k and when in fourth just ride it out til redline or the end of the run. GL!
Melting Slicks
Joined: Feb 2013
Posts: 2,034
Likes: 111
I would have guessed 145-150mph maybe but every day is different. the better way is to compare it to similar cars that ran on that day at the same event.
5500rpm shifting seems way too low. I would be shocked if your car is not making power at 6300-6400rpm so I'd shift just past that.
5500rpm shifting seems way too low. I would be shocked if your car is not making power at 6300-6400rpm so I'd shift just past that.
Race Director
Joined: May 2004
Posts: 16,667
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From: Raleigh, NC
St. Jude Donor '15
I was low 140's before going to e85, long tubes and more timing. Probably in the ballpark of you rwhp wise.
After adding those I went 163
Shifting at 5500 would be a bad idea, basically changing gears at the worst spot
Which location was it? How hot? Are you running meth? Tune could have been pulling a ton of timing once it was hot
After adding those I went 163
Shifting at 5500 would be a bad idea, basically changing gears at the worst spot
Which location was it? How hot? Are you running meth? Tune could have been pulling a ton of timing once it was hot
Thread Starter
Melting Slicks
Joined: Oct 2001
Posts: 2,562
Likes: 162
From: Louisville KY
2020 Corvette of the Year Finalist (performance mods)
C6 of Year Winner (performance mods) 2019
I was in Indiana in Oct between 70 -75. I do have long tubes and no meth or e85. I'm very interested in seeing what's the cost in running meth or e85.
Last edited by pjazz; May 26, 2017 at 10:43 PM.
Banned Scam/Spammer
Joined: Jan 2012
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From: Chicago Il
I just did a 1/2 mile event and everyone was doing different pulls. 30 roll, 40 roll, 60 roll. Some guys even started from a dead stop at 1/8 mile before the start cones. My question to you, what did you do at the beginning cones?
My best pass was 158 from a 40 roll. There are so many variables.
My best pass was 158 from a 40 roll. There are so many variables.
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Thread Starter
Melting Slicks
Joined: Oct 2001
Posts: 2,562
Likes: 162
From: Louisville KY
2020 Corvette of the Year Finalist (performance mods)
C6 of Year Winner (performance mods) 2019
Dead stop. Didn't know you had the option.
Last edited by pjazz; May 29, 2017 at 09:31 PM.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
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From: Santa Barbara CA
I think every one of these events is different. Even the Shift Sector airstrip attack events I've done have varied over the years. They used to do a ~40 roll at the cones, which were a 1/2 mile from the speed trap. I did about 165 mph like this in a C6 with 720 WHP or so. Now the events are mostly done from a dead stop, with the starting line being the beginning of the 1/2 mile. So that's going to result in lower speeds. I did about 153 mph with ~600 WHP in my GS at the last event. Heat soak was an issue though due to the nature of the event.
like was mentioned, the key is looking at what other cars are trapping. I was running faster than a tune/pulley ZR1, so I felt like I was right where I should be.
like was mentioned, the key is looking at what other cars are trapping. I was running faster than a tune/pulley ZR1, so I felt like I was right where I should be.
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
Yeah it seems to be a bit all over the place. I imagine it will get at least a little more standardized as 1/2 mile racing gets more popular. Or I hope it does anyways. Hard to compare much when one event starts from 40mph and another is starting at 0
Team Owner
Joined: Nov 2007
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From: Gilbert AZ
The roll thing is even more whacky because they tell people to start at 40, but some people are starting at 100, or 80. Or backing up all the way and doing a 2/3 mile run and claiming crazy 1/2 mile stuff.
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
Yeah that's a bit crazy, at the last one I was at they had cones you could use for roll racing someone if you wanted to but it ended up being like a 3/8 mile run from the cones, not a 1/2 mile plus room to get up to 40 or whatever
2/3 mile run had to put up some pretty crazy speeds
2/3 mile run had to put up some pretty crazy speeds
Race Director
Joined: Apr 2014
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From: North Texas
A few months ago I went to a Wanna Go Fast event. I have a GS Vert with a 650 Hennessy Package, stock 6 speed and Quartermaine Clutch. I've only had the car a year and I have Dynos from the previous owner of around 550 RWHP.
Trying multiple 1/2mile runs I was only able to reach 140MPH.
My question is would this be the normal speed I would achieve for a 1/2 mile run?
Is something wrong with the car?
Or do my driving skills suck that bad?.
One of my thoughts were could I be shifting at the wrong RPM. If I remember correctly I was shifting right before redline.
I was checking the last Dyno sheet and it looked like HP peaked at 5.5K
Should that be where I should have shifted and would it effect my speed that much.
Any Ideas would be appreciated.
Trying multiple 1/2mile runs I was only able to reach 140MPH.
My question is would this be the normal speed I would achieve for a 1/2 mile run?
Is something wrong with the car?
Or do my driving skills suck that bad?.
One of my thoughts were could I be shifting at the wrong RPM. If I remember correctly I was shifting right before redline.
I was checking the last Dyno sheet and it looked like HP peaked at 5.5K
Should that be where I should have shifted and would it effect my speed that much.
Any Ideas would be appreciated.
I think some people have given you some good advice. You should be going faster. My stock 11 GS A6 went 140 in the half mile.
Banned Scam/Spammer
Joined: Jan 2012
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From: Chicago Il
But the best thing was, I had a great time, no one was hurt, and my car did not break down.