Previous Thread
Next Thread
Print Thread
Launch retard timing curve #1667571
09/04/14 03:30 PM
09/04/14 03:30 PM
Joined: Jul 2008
Posts: 271
Indiana
D
dragracer1 Offline OP
enthusiast
dragracer1  Offline OP
enthusiast
D

Joined: Jul 2008
Posts: 271
Indiana
I gotta question for all the SLOW car guys. I'm not sure if any of this tech stuff about the car is relevant but I will add it just in case. I run a 408 small black in my 1974 Plymouth Scamp. I have a 904 trany and a pro-tree brake with 4.57's in the rear running on 28 x 10.5W's. I have a full Caltrac setup front and rear with Afco double adjustable shocks on the back. It runs low to mid 6.90's in the 1/8th. Im running the MSD Programmable 6al-2 box which gives me the ability to add different timing curves. My car runs the best with the timing set at 38 degrees advanced, so that is what I have it set at. 60ft times are 1.45/1.46 on a nice track but down to 1.49/1.50 on a warm track/worse track prep which is expected. But the problem is, with warmer track temps, it will hook decent on one pass and maybe turn the tires over 1 or 2 times on the next pass, and as we all know, that kind of consistency is not good for competitive bracket racing. My main question is, how much timing should I pull out after the initial hit (im starting .3 sec after unkeying the button to let the tires plant) and for how long should I keep it out? I want to be able to take some power out on the launch so it will be more contestant between track prep/temps, even though it will effect the 60ft times on a good cool track. Id rather it be slower and constancy than faster and sketchy. Any advice would be GREATLY appreciated.

Thanks
BP

Re: Launch retard timing curve [Re: dragracer1] #1667572
09/04/14 03:51 PM
09/04/14 03:51 PM
Joined: Nov 2003
Posts: 5,160
Texas
dannysbee Offline
master
dannysbee  Offline
master

Joined: Nov 2003
Posts: 5,160
Texas
I would ask in he racing section.


Getting old just means you were smarter than some and luckier than others.
Re: Launch retard timing curve [Re: dragracer1] #1667573
09/04/14 07:32 PM
09/04/14 07:32 PM
Joined: Aug 2003
Posts: 43,159
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,159
Bend,OR USA
I'm going to assume your slicks are bias plys? If not most radials are difficult to hook and stay hooked on a bad track If radials your probally going to have to find out what works on your car at the different tracks and conditions Good luck


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Launch retard timing curve [Re: Cab_Burge] #1667574
09/05/14 12:47 PM
09/05/14 12:47 PM
Joined: Jul 2008
Posts: 271
Indiana
D
dragracer1 Offline OP
enthusiast
dragracer1  Offline OP
enthusiast
D

Joined: Jul 2008
Posts: 271
Indiana
Thanks guys...and after I posted this, i figured I should have posted this in the race section..







Powered by UBB.threads™ PHP Forum Software 7.7.1