Hints on improving 60-ft times?
Thread Starter
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Hints on improving 60-ft times?
Still frustrating for me. I've got probably 30+ passes in my car, on stock tires but have yet to get better than a 2.1X. Today was the first day I've run consistant 2.1's. My first two passes were in the 2.2 range when a GTO owner suggested I keep TC on while launching, then switch it off prior to switching. It actually helped with every run after that being in the 2.1 range. Tire pressure around 25 psi with a slight burnout, just to heat them up. Runs were:
8.471@88.200 (2.133)
8.470@87.823 (2.109)
8.508@88.361 (2.141)
8.535@88.448 (2.186)
DA ranged between 3500-3900' (increased as the day wore on) so not the best for times or mph. All times correct to low 8's@92.X at sea level. Any suggestions would be appreciated.
8.471@88.200 (2.133)
8.470@87.823 (2.109)
8.508@88.361 (2.141)
8.535@88.448 (2.186)
DA ranged between 3500-3900' (increased as the day wore on) so not the best for times or mph. All times correct to low 8's@92.X at sea level. Any suggestions would be appreciated.
Thread Starter
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Originally Posted by DSOM Z51
Track preparation could have something to do with it.
Try running it at another track.
Try running it at another track.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Do a search for CF member Ranger, he's got links to tips in his signature, and read those and some of his other threads. There is a feel to holding the revs steady and walking out the clutch quickly, not dumping it, to get a good 60 ft. Ranger describes it very well and even has a video linked to one of his threads.
Reading Ranger's threads and watching his video and listening to the engine taught me how to launch - I went from 2.1's to 1.7's consistently on my C5. I haven't learned this C6 yet, only had it a month, but I got consistent 1.8's first time out. But this car has torque management in spades, when I shift gears it feels like the engine is shutting off even though TC is off. That causes my times to suffer.
You will never find anyone who is good running TC. It does not turn off fast enough and if it kicks in your run is cooked.
Reading Ranger's threads and watching his video and listening to the engine taught me how to launch - I went from 2.1's to 1.7's consistently on my C5. I haven't learned this C6 yet, only had it a month, but I got consistent 1.8's first time out. But this car has torque management in spades, when I shift gears it feels like the engine is shutting off even though TC is off. That causes my times to suffer.
You will never find anyone who is good running TC. It does not turn off fast enough and if it kicks in your run is cooked.
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Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by dennis50nj
22 lbs will slow down anything under 24 lbs will set low tire sensors off car will slow down
Drifting
Joined: Apr 2005
Posts: 1,366
Likes: 9
From: Jacksonville FL
hey Bunky,
Were you up at Palmdale? They generally have a pretty poor track setup up there. Have you tried Irwindale yet? Its supposed to be much better up there. I don't know, I never got to run there. Take care and I am sure I'll see you once you get to P'cola.
Were you up at Palmdale? They generally have a pretty poor track setup up there. Have you tried Irwindale yet? Its supposed to be much better up there. I don't know, I never got to run there. Take care and I am sure I'll see you once you get to P'cola.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 32
From: Central Florida
There several variables to combine in seeking to improve your 60' and 330' with an M6/M12 tranny...
(1) Launch rpm
(2) Clutch release speed
(3) Throttle squeeze
(4) Rear tire pressure
(5) heat of the rears by burnout
(6) Impact of Torque Management
Measuring the impact of a rear psi change is valid if the other variable remain generally constant.
One reason to reduce the rear psi to 26-27 is to decrease the chance of breaking the right CV joint due to wheel hop on the 1-2 shift.
Generally the key variable is choosing the right launch rpm...the allows a bit of spin so that when the tires hook, the rpms explode upward without a bog.
Ranger
(1) Launch rpm
(2) Clutch release speed
(3) Throttle squeeze
(4) Rear tire pressure
(5) heat of the rears by burnout
(6) Impact of Torque Management
Measuring the impact of a rear psi change is valid if the other variable remain generally constant.
One reason to reduce the rear psi to 26-27 is to decrease the chance of breaking the right CV joint due to wheel hop on the 1-2 shift.
Generally the key variable is choosing the right launch rpm...the allows a bit of spin so that when the tires hook, the rpms explode upward without a bog.
Ranger
Thread Starter
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Originally Posted by DrivnXcitment
hey Bunky,
Were you up at Palmdale? They generally have a pretty poor track setup up there. Have you tried Irwindale yet? Its supposed to be much better up there. I don't know, I never got to run there. Take care and I am sure I'll see you once you get to P'cola.
Were you up at Palmdale? They generally have a pretty poor track setup up there. Have you tried Irwindale yet? Its supposed to be much better up there. I don't know, I never got to run there. Take care and I am sure I'll see you once you get to P'cola.
Thread Starter
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Originally Posted by Ranger
There several variables to combine in seeking to improve your 60' and 330' with an M6/M12 tranny...
(1) Launch rpm
(2) Clutch release speed
(3) Throttle squeeze
(4) Rear tire pressure
(5) heat of the rears by burnout
(6) Impact of Torque Management
Measuring the impact of a rear psi change is valid if the other variable remain generally constant.
One reason to reduce the rear psi to 26-27 is to decrease the chance of breaking the right CV joint due to wheel hop on the 1-2 shift.
Generally the key variable is choosing the right launch rpm...the allows a bit of spin so that when the tires hook, the rpms explode upward without a bog.
Ranger
(1) Launch rpm
(2) Clutch release speed
(3) Throttle squeeze
(4) Rear tire pressure
(5) heat of the rears by burnout
(6) Impact of Torque Management
Measuring the impact of a rear psi change is valid if the other variable remain generally constant.
One reason to reduce the rear psi to 26-27 is to decrease the chance of breaking the right CV joint due to wheel hop on the 1-2 shift.
Generally the key variable is choosing the right launch rpm...the allows a bit of spin so that when the tires hook, the rpms explode upward without a bog.
Ranger
Last edited by bunk22; Jun 18, 2006 at 11:34 PM.
Melting Slicks
Joined: Nov 2002
Posts: 3,398
Likes: 2
From: Allentown PA
You need some spin or TM takes over...
Friday night my buddy borrowed my ET Streets. His first launch he launched at 3,500 and bogged. Since he could only get one more pass in he decided to go for broke (luckily he didn't break)...He launched off the rev limiter, the car hooked and bogged. Without some tire spin, your doomed....
Rear still in tact...
He was only able to pull a 2.1 off the rev limiter. Car was stock mn6 no tuning.
More proof for those that do not believe..........
Friday night my buddy borrowed my ET Streets. His first launch he launched at 3,500 and bogged. Since he could only get one more pass in he decided to go for broke (luckily he didn't break)...He launched off the rev limiter, the car hooked and bogged. Without some tire spin, your doomed....
Rear still in tact...
He was only able to pull a 2.1 off the rev limiter. Car was stock mn6 no tuning.
More proof for those that do not believe..........
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Originally Posted by CYA-Vett
You need some spin or TM takes over...
Friday night my buddy borrowed my ET Streets. His first launch he launched at 3,500 and bogged. Since he could only get one more pass in he decided to go for broke (luckily he didn't break)...He launched off the rev limiter, the car hooked and bogged. Without some tire spin, your doomed....
Rear still in tact...
He was only able to pull a 2.1 off the rev limiter. Car was stock mn6 no tuning.
More proof for those that do not believe..........
Friday night my buddy borrowed my ET Streets. His first launch he launched at 3,500 and bogged. Since he could only get one more pass in he decided to go for broke (luckily he didn't break)...He launched off the rev limiter, the car hooked and bogged. Without some tire spin, your doomed....
Rear still in tact...
He was only able to pull a 2.1 off the rev limiter. Car was stock mn6 no tuning.
More proof for those that do not believe..........
Thread Starter
Safety Car
Joined: May 2005
Posts: 3,990
Likes: 1
From: Corpus Christi Texas
Originally Posted by CYA-Vett
More proof for those that do not believe..........
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Originally Posted by glennhl
I'm not worthy, I'm not worthy. How the heck do you do it? Are you launching from idle? That seems to be my best procedure.
