Best way to launch a stalled A4
#1
Burning Brakes
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St. Jude Donor '12-'13
Best way to launch a stalled A4
I'm just curious to hear others thoughts on this.....
Seems to be 2 schools of thought on this subject.
Either you stage and floor it and the converter do it's thing, of you stage, flash the converter as far as you can and then floor it.
I've heard claims that Yank recommends flashing the converter, what say the general population?
Seems to be 2 schools of thought on this subject.
Either you stage and floor it and the converter do it's thing, of you stage, flash the converter as far as you can and then floor it.
I've heard claims that Yank recommends flashing the converter, what say the general population?
#2
Safety Car
Mine gets a better 60' with some footbrake. First you find what RPM you can reach before the brakes won't hold. Then stage the RPM a little under that, so you don't accidentally roll out of stage and redlight. For me, 2000-2500 works best.
#3
Melting Slicks
#4
Burning Brakes
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St. Jude Donor '12-'13
That's what I figured as well.....think I might have gone a bit overboard with the RPMs. Guess I'll try a few different launch RPMs to see what works best for my 3200 stall.
#5
Safety Car
Depends on the converter, right?
I have found that you want to stall it below where the car is trying to move forward hard.
Figure out where that is and then drop 500 rpm or so.
But basically you have to experiment.
You for sure don't want the car trying to lift the front before launch.
If the car hooks good, you aren't going to find a bunch of ET either way. Less than a tenth.
I'll be on my DR's for the first time this evening........
Ron
I have found that you want to stall it below where the car is trying to move forward hard.
Figure out where that is and then drop 500 rpm or so.
But basically you have to experiment.
You for sure don't want the car trying to lift the front before launch.
If the car hooks good, you aren't going to find a bunch of ET either way. Less than a tenth.
I'll be on my DR's for the first time this evening........
Ron
#6
Burning Brakes
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Location: South Elgin IL
Posts: 769
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St. Jude Donor '12-'13
Depends on the converter, right?
I have found that you want to stall it below where the car is trying to move forward hard.
Figure out where that is and then drop 500 rpm or so.
But basically you have to experiment.
You for sure don't want the car trying to lift the front before launch.
If the car hooks good, you aren't going to find a bunch of ET either way. Less than a tenth.
I'll be on my DR's for the first time this evening........
Ron
I have found that you want to stall it below where the car is trying to move forward hard.
Figure out where that is and then drop 500 rpm or so.
But basically you have to experiment.
You for sure don't want the car trying to lift the front before launch.
If the car hooks good, you aren't going to find a bunch of ET either way. Less than a tenth.
I'll be on my DR's for the first time this evening........
Ron
#7
Safety Car
#11
#12
Le Mans Master
N20 worked ... 93% humidity, 3200da ran some 10.33 . . . breaking up in 3rd I think I was running out of fuel ... overall, I'm very happy with today's results cause I was running too fast for the 10.50 index then the rain came and washed it all away!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
#13
Le Mans Master
Yeah the Brick
Great sixty foot times and runs
N20 worked ... 93% humidity, 3200da ran some 10.33 . . . breaking up in 3rd I think I was running out of fuel ... overall, I'm very happy with today's results cause I was running too fast for the 10.50 index then the rain came and washed it all away!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
#14
N20 worked ... 93% humidity, 3200da ran some 10.33 . . . breaking up in 3rd I think I was running out of fuel ... overall, I'm very happy with today's results cause I was running too fast for the 10.50 index then the rain came and washed it all away!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
Got my ticket stamped so the next race is on them!
MPH was low (129) from breaking up - up top!
"I personally, have NEVER burned up anything by being too lean.
You know, we talk about this all the time and make comparisons, but it is pretty much accepted, that a nitrous engine, is still a N/A engine and you tune it as such. So if you were running down the track on motor and your fuel pump quits, you have just run that engine as lean as lean can be. Did you hurt it..........highly unlikely. No fuel, nothing to burn, no heat. A nitrous motor is the same way.......too little fuel, it has nothing to burn, so it just makes no power, it does not eat parts.
I am sure, make that, I KNOW, that others will not agree and we hear stories of "I had a clogged fuel jet, burned my motor up", etc, etc, etc. All I can say, is that I have been using nitrous, for more than 30 years and I can say with conviction, that I have NEVER burned up a motor with a lean tune, nor have I had a piece of trash, or whatever, in a fuel jet, hurt anything. But that's just me..............lol
When people do attempt to get their tune more in line, by cleaning it up and fail to take additional timing out, is usually when the damage happens. Then they incorrectly deduce, that they got it too lean."~per Monte Smith
Thanks..........
#15
Le Mans Master
sorry if I high-jacked this thread!
thanks again for the info, LSOHOLIC ...
we didn't log the runs ... our train of thought today was not to make more then one change at a time and we did two, one was me staging a little deeper, ... then the rain came.
thanks again for the info, LSOHOLIC ...
we didn't log the runs ... our train of thought today was not to make more then one change at a time and we did two, one was me staging a little deeper, ... then the rain came.
Last edited by Rob Petyo; 08-11-2012 at 09:36 PM.
#18
Safety Car
I was leaving at 2000 and the car was spinning. Tried 1700, spun. Ran out of time and they booted me for no roll bar.
I went too low on the pressure in the Hoosiers as well, I felt the dreaded tire shudder.
So I don't know Hugger....my first time on DR's in a stalled C5 as well.
I'll try again when the bar is in the car.
I did manage to run 11.30s though 121-122 mph.
Ron
I went too low on the pressure in the Hoosiers as well, I felt the dreaded tire shudder.
So I don't know Hugger....my first time on DR's in a stalled C5 as well.
I'll try again when the bar is in the car.
I did manage to run 11.30s though 121-122 mph.
Ron
#19
Melting Slicks
we are similar on launch rpm. i launch at 2200 to 2400 with a 3600 converter. i run 3.73 gears and 4l60e trans and cut mid 1.3 60ft times. if stalled deep for faster reaction time racing index races usually 1.4 to 1.47 sixties
#20
Instructor
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Location: Simpsonville SC
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You mind if ask what your tire and wheel setup is? Your car cuts a killer 60ft