Retarding timing at launch

Just curious as to how much timing you can pull out at launch on blown alky deal. I've pulled as much as 15 degrees at launch. My new ignition will allow me to pull out as much as 30 degrees. Anyone pulled more than 15? I am now running a Mag 44 with the big cap so rotor phase shouldn't be an issue.

 

timing

I have ssen it pulled to zero before.
Sean

 

Ive pulled as much as 19 out with our car. Putting it at 10 total...

 

no prob we do it all the time

 

pulled 30 out? what was total timing?

 

no not 30i think we pull14 or so

 

timing

I have went with 28 intial and pulled 28 out. Even seen some guys with negative timing. Better watch your fuel system and pull that to.

Sean

 

Definitely should watch the fuel system. The fuel system can also help you get down the track as well.

Danny, how did your testing go? By the looks of the post, you had traction issues...

 

Traction issus to say the least, unfortunately, we had some valve cover sealing issues that we weren't able to correct at the track so we were only able to make 1 hit. Instant burnout, had 15 degrees pulled, but I had extension too stiff on the shocks. Motor did sound good and the brakes and chutes work, car drives good, so not a total loss.
So are you saying I should pull fuel out when i retard? I've never done that before, or are you saying fatten up for the launch to kill power?

 

Pulling fuel makes it more aggressive... Is it a clutch car? If so, do you swap feet or use a 2 step?
If its a converter car, what box do you use? Or do you use 6 shooters?
Also, do you have a fuel management system??
If you want, e mail me. Its alot faster for me. Or call.
Jason@lhpracing.com
(916)505-6852

 

One of the biggest mistakes I have seen when running on questionable tracks is to soften the car up too much. An example- At Spokane many racers will start in second gear or drive off the line and then accelerate. I softened the clutch up a little and lowered my starting line RPM to 5500 and did just fine. The key is getting the clutch to slip- too soft and the clutch will grab and not slip. You need to apply enough power to make the clutch slip. Dave Germain

 

timing

He runs a 10.5 tire and an auto. Very fine line.

Sean

 

What about risk of backfire?

 

Launch

Danny How Fast You Spinning The Whipple?
Take The Belt Off

 

60 over gonna drop another 5 out (start at 5 initial) and make some suspension changes

 

you better listen to Will...that is very correct..Dave
www.myspace.com/daveloweswr

 

We phase ours to about half of what we pull. So, for example, if your pulling 10 out with the trigger from 30, we phase the mag at 25. Never had 1 issue.

Also, we pull between 15-20 depending on conditions, with the small cap. Never had an issue, but we change cap and rotor after every event. Been contemplating going to the big cap though for a while. May need to now.

 

Big cap, put that on first thing becasue i knew i was retarded
I also split the difference on the phase. Forgot to do that once on my old motor and it missed to about 100 ft and then cleared up as the timing came in. Didn't hurt any parts luckily though.

 

Why not phase it at the max retard?