went to the track today
Joined: Jun 2002
Posts: 30,341
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From: Cambridge, Ont. Canada
Originally Posted by G35Now!
You might take a look at his slips before making that call. For example, I've never gone to the track before, so would expect to miss the car's maximum perf. Kendroz could be really good, or could be he's a track newbie like me.
Absolutely good point.
Also it would take more than a few runs to maximize your launch, tire pressure, rpm, manual or auto mode, cooldown between runs,-- there's a ton of things to consider to optimize your times.
There's a hell of a difference in times if Kendroz did all that or if he just stopped for a couple of quick runs and has no experience.
One thing's for sure: 84 degrees is no cool day....
Good times whether he practiced or not.....
C.
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Joined: Jan 2007
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From: Carolinas USA
Originally Posted by kendroz
temp was 84deg F.
First run : 14.18 at 98mph
Second run : 14.10 at 99mph
Will scan time slips soon.
I believe those numbers are good for and automatic.
Take care
First run : 14.18 at 98mph
Second run : 14.10 at 99mph
Will scan time slips soon.
I believe those numbers are good for and automatic.
Take care
The 99mph is good for a low 14, high 13 run..
Your 60' time shows how well you hooked up. The MPH shows how much power you are making.. Nice times.
Honestly, I was expecting a little more MPH and better ETs out of the 07s. Low to upper 14.1s@98-99mph suggests to me that his 60 foots are decent (probably low to mid 2.1s). My 03 did 14.4 in the high 97s stock in 80 degree weather and 14.3s@98mph in 50 degree weather. These VQ35s don't seem to be terribly dependant on temp. Once this guys posts up where he ran and on what date, I can calculate the atmospheric conditions which will tell us a lot about the potential of the 07 5AT.
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From: Hell aka AZ
in an auto, it's easy
Originally Posted by terrycs
Just have to ask ... where are you located (84F?) the rest of us are pretty cold this time of year!
Good job at the track!
Can you (or anyone else reading) provide the the best technique for launching aside from environmental conditions?
In the old days, I would know what the optimum RPM should be for the torque converter I had, but now, I'm not sure what to hold at.
Good job at the track!
Can you (or anyone else reading) provide the the best technique for launching aside from environmental conditions?
In the old days, I would know what the optimum RPM should be for the torque converter I had, but now, I'm not sure what to hold at.
)2. Hold down the brake.
3. hold down the gas.
4. The engine will rev until the Torque convertor reaches it's optimum RPM's
5. Let go of brake at last yellow light
5. weeee! away you go!
Last edited by John2.5RS; Jan 20, 2007 at 01:08 AM.
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Joined: Jan 2007
Posts: 112
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From: Austin, TX
re: Launch 6MT with ebrake
no no no no!
Launching a manual transmission vehicle is a long practiced skill. Be prepared to replace your clutch a few times if you're trying to do drag-race launches in a car that you're not already proficient at driving.
Depending on track and tire conditions your optimum launch parameters will vary, but in general you will rev the engine to an RPM high enough to prevent bogging, but low enough to prevent massive wheelspin and then rapidly feather the clutch engagement while going to full throttle. When done perfectly, you will get just a little wheel spin before the tires hook up and the engine stays in the power band the whole time. The more torque the motor has, the lower the launch RPM will be. When done properly, you won't slip the clutch but for a half-second or so.
no no no no!
Launching a manual transmission vehicle is a long practiced skill. Be prepared to replace your clutch a few times if you're trying to do drag-race launches in a car that you're not already proficient at driving.
Depending on track and tire conditions your optimum launch parameters will vary, but in general you will rev the engine to an RPM high enough to prevent bogging, but low enough to prevent massive wheelspin and then rapidly feather the clutch engagement while going to full throttle. When done perfectly, you will get just a little wheel spin before the tires hook up and the engine stays in the power band the whole time. The more torque the motor has, the lower the launch RPM will be. When done properly, you won't slip the clutch but for a half-second or so.
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From: Boston
Originally Posted by John2.5RS
1. place car in gear(forward prefered )
1. Hold down the brake.
2. hold down the gas.
3. The engine will rev until the Torque convertor reaches it's optimum RPM's
4. Let go of brake at last yellow light
5. weeee! away you go!
)1. Hold down the brake.
2. hold down the gas.
3. The engine will rev until the Torque convertor reaches it's optimum RPM's
4. Let go of brake at last yellow light
5. weeee! away you go!
Thats what C&D said as well... What RPM can u brake/rev to? Can there be potential damage to the tranny?
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From: Hell aka AZ
It will not damage the motor, Depends how often and how long you do it. hold the brakes while at full throttle and not moving, your still loading the engine so it's not as bad as reving it in neutral, and it will not go to redline if it's in gear and your not moving, so no worries there, all it's doing is heating up the trans fluid. It's not that bad for it ,really. Just make sure you stay on top of your trans. fluid replacement, I'd recommend doing it every 20k miles if your racing it, it may seem excessive, but it's only like $60 vs. $$$ for rebuild/replacing burned up transmission. It should have a ATF fluid cooler, but it never hurts to get a larger trans. fluid cooler IMO, it greatly extends the life of both the fluid and the transmission. A cooler transmission is also more efficient, and feels peppier IMO.
The best way to find the stall speed of the stock Torque Convertor is as follows:
1. Place the car in gear (D)
2. Hold the brakes down firmly
3. ease the throttle, watching the RPMS
4. when the RPM's stop increasing when you go deeper into the throttle, that is the stock stall speed.
When you do it, post the results please.
aftermarket torque convertors are one of the best ways to improve 60ft times in an automatic. By improving the efficency of the convertor fins, it increasing the stall speed rpms, which also has an added benefit of better fuel economy.
The best way to find the stall speed of the stock Torque Convertor is as follows:
1. Place the car in gear (D)
2. Hold the brakes down firmly
3. ease the throttle, watching the RPMS
4. when the RPM's stop increasing when you go deeper into the throttle, that is the stock stall speed.
When you do it, post the results please.
aftermarket torque convertors are one of the best ways to improve 60ft times in an automatic. By improving the efficency of the convertor fins, it increasing the stall speed rpms, which also has an added benefit of better fuel economy.
Last edited by John2.5RS; Jan 21, 2007 at 12:34 PM.
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