0-60 L99 advice?

[SSSoon]

Been getting more interested in setting a base-line for performance before doing more mods, so bought the iPod app Dynolicious tonight to test out my acceleration. Up until now I have tried the video approach, cutting it on both ends, with my best 0-60 times around 5.0 and 5.1 seconds. Not sure I am great at video cutting, though, so that might not be fully accurate.

Anyways, found a nice flat and level stretch tonight (about 70 degrees, 50% relative humidity, 29.93" barometric pressure, elevation about 500 ft) and tried a few runs before it got dark. L99, no tune, X-pipe, ported TB, and Cold Air CAI, on stock Pzeros. In Sport mode, but left all the electronics (TC, etc) on. 1/4 tank gas.

My best run looked like this (brake, 1000 rpm, then floor it and let off brake simultaneously):

0-10 MPH = 1.01 sec
0-20 = 1.67
0-30 = 2.35
0-40 = 3.23
0-50 = 4.22
0-60 = 5.31 sec

60 foot time, 2.35 sec @ 34.8 mph

(in terms of setup, 0" rollout, 0.10 G Trigger)

So.... is this decent? I'll try it again a bunch this weekend to see if I can better. But if our cars are rated at 4.7 sec, I wonder if I am either doing something wrong, or if there are settings I should be thinking of to get closer to 4.7?

Thanks for any comments from anyone else who has spent time trying to get their (basically stock) L99s down to 4.7.

Pete

[ckaram]

How many miles on your 2011? Also, those apps may not always be dead on...

[Synner]

You need to turn off all the nannies for the best times. I'd start there and practice your launch if you want to avoid a tune to get rid of torque management. Although the tune would be the best next step for an auto.

[SSSoon]

Originally Posted by ckaram

How many miles on your 2011? Also, those apps may not always be dead on...

Good question - 6,224 miles.

Yeah, I hear you on the apps. But there are people out there on this board who are saying 4.7 with a stock L99 using these apps, I think...

[SSSoon]

Originally Posted by Synner

You need to turn off all the nannies for the best times. I'd start there and practice your launch if you want to avoid a tune to get rid of torque management. Although the tune would be the best next step for an auto.

SCT arriving next week... that's why I'm trying to establish some base-lines

Gonna try it without TC on the weekend, I guess, see what I get.

Thanks man!

[toehead93]

Your 60' time can be better, closer to 2.0 and you'll have a much better 0-60 time. So far my best 60' is 2.1 but I feel 2.0 is possible. Definately turn off TC it makes a big difference. With TC on I can put my left on the brake and pund the gas pedal and get no wheel spin. With TC off the tires shred.

[SGOS252382]

As toehead mentioned, your 60' time is a little slow. But that's to be expected on the street. 60' time is all about traction leaving the line.

At the track (much sticker surface) you can pull much faster 60' times if you use the right launch technique.

For a good run, you'll want your 60' time down around 2.0. But that might be difficult on the street. With a 2.0 sec 60' time, you'd be down in the 4.x sec 0-60mph range.

But overall, your times are pretty much what you should expect with a not so fast 60' time.

[SSSoon]

Originally Posted by SGOS252382

As toehead mentioned, your 60' time is a little slow. But that's to be expected on the street. 60' time is all about traction leaving the line.

At the track (much sticker surface) you can pull much faster 60' times if you use the right launch technique.

For a good run, you'll want your 60' time down around 2.0. But that might be difficult on the street. With a 2.0 sec 60' time, you'd be down in the 4.x sec 0-60mph range.

But overall, your times are pretty much what you should expect with a not so fast 60' time.

Thanks for the suggestion. Will try a few more runs this weekend, see what I can get on the 60' time. Really appreciate the help!

[hrpiii]

Originally Posted by toehead93

Definately turn off TC it makes a big difference. With TC on I can put my left on the brake and pund the gas pedal and get no wheel spin. With TC off the tires shred.

so turn off TC so you get wheelspin at launch instead of no-wheel spin. Wouldn't wheel spin off the line be "bad" as you are not getting traction?

[Neriah]

TC applies brake to the wheels so they dont spin.....brake=not what you want lol. This takes driver skill not to shred the tires, but leaving TC on will never allow you to get the best 0-60 times that the car can acheive.

[SGOS252382]

Originally Posted by hrpiii

so turn off TC so you get wheelspin at launch instead of no-wheel spin. Wouldn't wheel spin off the line be "bad" as you are not getting traction?

The problem with the TC is it restricts power going to the rear wheels.

The secret is learning how to launch your car without excessive wheel spin with the TC off. Once you learn how to do that, you'll run faster times.

A skilled driver will run faster times with the TC off.

[SSSoon]

So I tried a few more runs yesterday afternoon. 79 degrees, 46% relative humidity, barometric pressure not sure. L99, no tune, X-pipe, ported TB, and Cold Air CAI, on stock Pzeros. 1/4 tank gas.

Best run was a little better than last time (no brake stand, Sport mode, TC on, just floored it):
0-10 MPH = .78 sec
0-20 = 1.48
0-30 = 2.22
0-40 = 3.10
0-50 = 4.03
0-60 = 5.04 sec

The thing I can't figure out is: 60 foot time, 2.52 sec @ 26.6 mph. That's .09 sec / 8 mph SLOWER than my last run, but let me hit 60 mph 0.27 sec faster. I am beginning to think that the speed data in Dynolicious is more accurate than the distance data. Has anyone else found this too?

BTW I tried turning TC off and doing a few runs. Lots of rubber left on the road, and really crappy 0-60 times. SGOS252382 said it took skill and boy is he right... it's going to take a while to figure out how not to get excessive wheel spin.

Hey one last question, does anyone have a good link for understanding the effect of temperature, humidity, and pressure on our Camaros? I also think I remember someone posting a link for a calculator to show you what a certain time would have been at ideal temp, RH, pressure. Of course I can't find it again no matter how much searching. Anyone have something like that bookmarked?

Late last night I installed my JRE tune, took a half hour spin around the streets. Wow, nice shifting! Feels much more responsive. Not sure it will make any diff on 0-60 but will give it a try later today if I can.

Thanks guys!

[SGOS252382]

You're 60' time is obviously wrong.

Here's a chart converting 60' times to 0-60mph. I got this from another forum. I'm not sure how accurate it is, but it gives you an estimate of how they would match up.


2.3 second 60' time = 35.5 mph @60' = 7.0 second 0-60 time
2.2 second 60' time = 37.1 mph @60' = 6.5 second 0-60 time
2.1 second 60' time = 38.9 mph @60' = 5.9 second 0-60 time
2.0 second 60' time = 40.9 mph @60' = 5.2 second 0-60 time
1.9 second 60' time = 43.0 mph @60' = 4.6 second 0-60 time
1.8 second 60' time = 45.5 mph @60' = 4.0 second 0-60 time
1.7 second 60' time = 48.1 mph @60' = 3.4 second 0-60 time
1.6 second 60' time = 51.1 mph @60' = 2.9 second 0-60 time
1.5 second 60' time = 54.5 mph @60' = 2.2 second 0-60 time
1.4 second 60' time = 58.4 mph @60' = 1.5 second 0-60 time
1.36 second 60' time = 60.0 mph @60' = 1.36 second 0-60 time
1.3 second 60' time = 62.9 mph @60' = 1.2 second 0-60 time

[SSSoon]

Originally Posted by SGOS252382

You're 60' time is obviously wrong.

Here's a chart converting 60' times to 0-60mph. I got this from another forum. I'm not sure how accurate it is, but it gives you an estimate of how they would match up.\

Thanks.

Conclusion = Dynolicious iPhone app is fine for acceleration, not so much for distance.