Why is my C5 slow?
01-05-2007, 04:24 PM
#41
Safety Car
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Just curious but what tranny do you have - an auto ? 
Used to own a '98 coupe A4 and I could get more out of it by manual shift right at the redline.
Otherwise, if you have a 6-spd and your clutch is slipping then the run times will suffer.
Used to own a '98 coupe A4 and I could get more out of it by manual shift right at the redline.
Otherwise, if you have a 6-spd and your clutch is slipping then the run times will suffer.
01-05-2007, 06:54 PM
#43
Pro
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Location: Prescott Valley Arizona
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Everyone is quick to blame the car......
But by what he posted (left the car in OD and left traction control on), I seriously doubt he even knows how to properly launch an A4.
If I were him, I would do a forum search on the proper launch technique.
Just for quick reference though, next time you go to the track:
1. Place the car in competition mode (you'll be happy you did).
2. Put the car in 3rd gear.... Let it do the shifting for you.
3. Put your left foot on the brake and hold the gas pedal down until the tachometer is holding around 1500 RPMs. If the wheels are slipping, then back off a little on the gas.... If they're not, then appliy a little more gas until just before the wheels spin.... DON'T SMOKE THE TIRES!!!
4. When the last yellow light lites, let off the brake and at the same time, push down the gas pedal..... Don't stomp it, but firmly press it all the way down. If you do it right, you won't "red light".
5. Hold on and pay attention to the road and the car, don't look at the other guy or the speedometer..... As you pass the finish line let off the gas and slowly apply the brakes, don't slam them on.
If you do that, I bet your track times will improve..... If not, then check out the car.
Good luck.......
But by what he posted (left the car in OD and left traction control on), I seriously doubt he even knows how to properly launch an A4.
If I were him, I would do a forum search on the proper launch technique.
Just for quick reference though, next time you go to the track:
1. Place the car in competition mode (you'll be happy you did).
2. Put the car in 3rd gear.... Let it do the shifting for you.
3. Put your left foot on the brake and hold the gas pedal down until the tachometer is holding around 1500 RPMs. If the wheels are slipping, then back off a little on the gas.... If they're not, then appliy a little more gas until just before the wheels spin.... DON'T SMOKE THE TIRES!!!
4. When the last yellow light lites, let off the brake and at the same time, push down the gas pedal..... Don't stomp it, but firmly press it all the way down. If you do it right, you won't "red light".
5. Hold on and pay attention to the road and the car, don't look at the other guy or the speedometer..... As you pass the finish line let off the gas and slowly apply the brakes, don't slam them on.
If you do that, I bet your track times will improve..... If not, then check out the car.
Good luck.......
01-05-2007, 07:32 PM
#44
Le Mans Master
New air filter and plugs is a good start. I would also have the catalytic converters checked to see if they could be going bad and possiblly clogged.
01-05-2007, 07:38 PM
#45
Burning Brakes
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There's definitely something wrong, and no matter how poor your driving, you 91mph trap speed is way too low. It's about 15mph slower than it should be. You track results are equivalent to a 200hp V6 Camaro.
I don't know how mechanically inclined you are, but I would agree that taking your car to an experienced, Corvette mechanic/specialist. Prior to that, the one simple thing you can do is check to see how dirty/clogged your air filter is, because if it's limiting airflow to the engine, it can affect power output.
I don't know how mechanically inclined you are, but I would agree that taking your car to an experienced, Corvette mechanic/specialist. Prior to that, the one simple thing you can do is check to see how dirty/clogged your air filter is, because if it's limiting airflow to the engine, it can affect power output.
01-05-2007, 07:52 PM
#47
Pro
Just a thought! Was it a California car? Maybe the Cat converters are clogged? Seems like every California car I've seen goes through Cats. early.
02-20-2007, 10:37 PM
#52
Melting Slicks
02-20-2007, 11:05 PM
#53
Safety Car
Let someone else that has experience in the 1/4 mile drive your car and see if they get close to the same ET. That will tell you if it's the driver or the car. If it's the car, then I would go do a Dyno pull and have them scan it while doing a pull. There is about a million things that can cause you to lose power.
02-20-2007, 11:15 PM
#55
Pro
I will turn the traction control off next time (I can't believe I didn't think of that there!). Could this make that big of a difference?
What else can I check? Fuel/Air filters? Should I have a shop check it out? Will a diagnostic test tell me anything or do they have to do a dyno on it? About how much is that (incl. vette tax!)?
What else can I check? Fuel/Air filters? Should I have a shop check it out? Will a diagnostic test tell me anything or do they have to do a dyno on it? About how much is that (incl. vette tax!)?
02-21-2007, 01:31 AM
#57
Race Director
