Automatic guys I need some help
Thread Starter
Instructor
Joined: May 1999
Posts: 137
Likes: 0
From: orlando fl us
Automatic guys I need some help
Just purchased an 02 convertible. Couple of questions:
What is the best way to drive the car for the best performance at the track. Keep it in overdrive or D and let it shift itself, or manually shift it?
What should the ET and MPH be on a stock car with the 3.15 axle ratio?
Also what does the Z51 suspension package consist of?
Any help will be greatly appreciated. Just got the car 2 days ago.
Tom
What is the best way to drive the car for the best performance at the track. Keep it in overdrive or D and let it shift itself, or manually shift it?
What should the ET and MPH be on a stock car with the 3.15 axle ratio?
Also what does the Z51 suspension package consist of?
Any help will be greatly appreciated. Just got the car 2 days ago.
Tom
Heel & Toe
Joined: Nov 2003
Posts: 21
Likes: 0
From: Parker CO
Re: Automatic guys I need some help (1QWIKLT1)
I would suggest that you get an aftermarket air cleaner like the Donaldson. It is the one item dollar for dollar that delivers a good performance boost. I then would second the recommendation for an LS1 edit by a good tuner. Make sure you install the aircleaner before the LS1 edit. These are the two most effective things you can do and still remain a stock car. Once you have the edit, your shift points will be adjusted to deliver maximum power and you can just leave it in drive and concentrate on the reaction time. Make sure you turn off your traction control before each run.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Automatic guys I need some help (chevysales)
it has been rumored that the A4 selector in "3" allows the RPM to climb a bit more before it shifts.
Also the "competitive driving" mode is great because it turns off traction control but leaves the AH operational.
Also the "competitive driving" mode is great because it turns off traction control but leaves the AH operational.
Burning Brakes
Joined: Oct 2003
Posts: 1,162
Likes: 0
From: Dubai
Re: Automatic guys I need some help (Mike Mercury)
I have pondering the same question for some time now. Like Mike said it does feel sometimes that putting it in 3 gives you a later shift but then again sometimes the D setting feels more powerful :confused: either way always put in Competition Mode. :steering: :yesnod: . Tell you what since you are going to the track you will have the best oppurtunity to find out for us. Try all combos.
1- D
2- 3
3- Manual Shifting
Then tell us. :thumbs: :cheers:
1- D
2- 3
3- Manual Shifting
Then tell us. :thumbs: :cheers:
Team Owner
Joined: Feb 2000
Posts: 32,545
Likes: 2
From: Lithia FL
Cruise-In II & IV Veteran
CI VI Drag Champ!
Re: Automatic guys I need some help (1QWIKLT1)
The Z51 has stiffer shocks and a stiffer spring and thicker sway bars (not pluses for drag racing)
Totally stock you may see mid to low 13s.
Leave it D and let it do what it needs to do. 4th may make an additional shift and manually shift can be fun but isn't the healthiest for the trans.
Long list of stuff you can do to help that. Some have gotten their car down to 11s with only major change being gears and converter.
I take you will be racing it in the Ecklers Florida Corvette Challenge? http://www.flacorvettechallenge.com
[Modified by REDGAR, 1:59 PM 1/4/2004]
Totally stock you may see mid to low 13s.
Leave it D and let it do what it needs to do. 4th may make an additional shift and manually shift can be fun but isn't the healthiest for the trans.
Long list of stuff you can do to help that. Some have gotten their car down to 11s with only major change being gears and converter.
I take you will be racing it in the Ecklers Florida Corvette Challenge? http://www.flacorvettechallenge.com
[Modified by REDGAR, 1:59 PM 1/4/2004]
Le Mans Master
Joined: Jan 2003
Posts: 6,427
Likes: 0
From: houston texas
Re: Automatic guys I need some help (REDGAR)
leave it in 3rd gear and let her fly, you should see some 13.30's104MPH TO 13.50'S. ADD some type of cold air intake and drop 3 or 4 tenths easy, good luck. :yesnod: :thumbs:
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Re: Automatic guys I need some help (V8_Club)
OK here's your answer, In manual 1st gear you bring on an addtional clutch pack so your running through the forward clutch and the low/reverse clutch instead of just the forward clutch and sprag.
This will give greater holding capacity in 1st gear (not required unless you have slicks).
Manually shifting will in no way harm your trans, however I doubt you will be as consistant as the computer is.
The PCM looks at RPM, throttle position and road speed to determine shift points so no matter what gear you leave it in they will be the same at WOT.
Since the converter has a fixed position stator the launch will be the same in all gear positions. :rolleyes:
So I would just take your pick and go from there, personally I use OD and let the computer do the work. :cheers:
Road racing is a different story though. :)
This will give greater holding capacity in 1st gear (not required unless you have slicks).
Manually shifting will in no way harm your trans, however I doubt you will be as consistant as the computer is.
The PCM looks at RPM, throttle position and road speed to determine shift points so no matter what gear you leave it in they will be the same at WOT.
Since the converter has a fixed position stator the launch will be the same in all gear positions. :rolleyes:
So I would just take your pick and go from there, personally I use OD and let the computer do the work. :cheers:
Road racing is a different story though. :)
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Thread Starter
Instructor
Joined: May 1999
Posts: 137
Likes: 0
From: orlando fl us
Re: Automatic guys I need some help (1QWIKLT1)
Thanks for the help guys. The track opens Jan 17th and I plan on being there that week it opens. I'll try it in D for the first run and see how that works out. I do know for sure that in OD the car will not rev to 6000 rpm before shifting. Looks to be shifting somewhere around 5,700-5,800 rpm.
As far as air intakes go which one provides a decent performance gain verus ease of installation? Noticed the BPP Vortex in ecklers looks like it may be a good one.
As far as air intakes go which one provides a decent performance gain verus ease of installation? Noticed the BPP Vortex in ecklers looks like it may be a good one.
Le Mans Master
Joined: Nov 2000
Posts: 7,294
Likes: 1
From: Coral Springs Florida
Re: Automatic guys I need some help (1QWIKLT1)
Noticed the BPP Vortex in ecklers looks like it may be a good one. ...1QWIKLT1
Burning Brakes
Joined: Aug 2002
Posts: 949
Likes: 1
From: Cary Il
Re: Automatic guys I need some help (1QWIKLT1)
Put it in "3" - you do not want a shift into Overdrive, Launch from Idle (895 - 1000 RPM MAX), TURN OFF AH & TC you can't do a burnout with them on, Leave when you see the THIRD YELLOW LIGHT, Just put the gas to th floor don't SLAM IT DOWN, If the rear ends "walks a little bit" slightly turn the wheel IN THE DIRECTION THE REAR END IS GOING.
I ran the Blackwing, the Vararam, and The Breathless Rammer and if you go on the Breathless website you can see my times with each bolt on modification. Each intake is good and will perform well; however, each will react a bit different to your setup as you add modifications. You can look at my signature to see which one I am still running at 10.88/127MPH
I will be going with the Blackwing and the Vinci Air Box with the new 427CI C5-R motor due to the boost increase to 12 lbs.
Good Luck and be SAFE!
JR
PS - Don't shift manually, GM programs in a delay for each manual shift, so you will only loose time with no positive benefit, we've all tried it!
[Modified by JR-CRUZN-C5, 2:28 PM 1/5/2004]
I ran the Blackwing, the Vararam, and The Breathless Rammer and if you go on the Breathless website you can see my times with each bolt on modification. Each intake is good and will perform well; however, each will react a bit different to your setup as you add modifications. You can look at my signature to see which one I am still running at 10.88/127MPH
I will be going with the Blackwing and the Vinci Air Box with the new 427CI C5-R motor due to the boost increase to 12 lbs.
Good Luck and be SAFE!
JR
PS - Don't shift manually, GM programs in a delay for each manual shift, so you will only loose time with no positive benefit, we've all tried it!
[Modified by JR-CRUZN-C5, 2:28 PM 1/5/2004]
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: Automatic guys I need some help (JR-CRUZN-C5)
Put it in "3" - you do not want a shift into Overdrive, Launch from Idle (895 - 1000 RPM MAX), TURN OFF AH & TC you can't do a burnout with them on, Leave when you see the THIRD YELLOW LIGHT, Just put the gas to th floor don't SLAM IT DOWN, If the rear ends "walks a little bit" slightly turn the wheel IN THE DIRECTION THE REAR END IS GOING.
I ran the Blackwing, the Vararam, and The Breathless Rammer and if you go on the Breathless website you can see my times with each bolt on modification. Each intake is good and will perform well; however, each will react a bit different to your setup as you add modifications. You can look at my signature to see which one I am still running at 10.88/127MPH
I will be going with the Blackwing and the Vinci Air Box with the new 427CI C5-R motor due to the boost increase to 12 lbs.
Good Luck and be SAFE!
JR
PS - Don't shift manually, GM programs in a delay for each manual shift, so you will only loose time with no positive benefit, we've all tried it!
I ran the Blackwing, the Vararam, and The Breathless Rammer and if you go on the Breathless website you can see my times with each bolt on modification. Each intake is good and will perform well; however, each will react a bit different to your setup as you add modifications. You can look at my signature to see which one I am still running at 10.88/127MPH
I will be going with the Blackwing and the Vinci Air Box with the new 427CI C5-R motor due to the boost increase to 12 lbs.
Good Luck and be SAFE!
JR
PS - Don't shift manually, GM programs in a delay for each manual shift, so you will only loose time with no positive benefit, we've all tried it!
Except for the AH part, you can do a burn out with AH turned on. Hold the button down for 7 seconds and the DIC will indicate competition mode, in this mode AH is still active and will keep the car pointed straight but traction control will be disarmed allowing the rear tires to spin.
I always shift to "3" if I leave it in OD I can pretty much guarantee on adding .3 or .4 to my time.
Burning Brakes
Joined: Aug 2002
Posts: 949
Likes: 1
From: Cary Il
Re: Automatic guys I need some help (runamuk)
In a 2000 C5 4L60E if you try to do a burnout with AH on the fuel will shut off until traction is resumed - that may be different in later years. My experience is that turning off TC & AH leaves the ABS on and nothing else.
JR
JR