Best way to launch with auto?
Best way to launch with auto? I'm wondering what the state of the art is today. Back in the day, my B&M hydro with 3500 stall launched best nailing it from idle until I got it dyno tuned and lost it's throttle response. After that it launched best at 2800 or so, but not as good as before.
What is good today, say with a stock converter?
With a 3500 RPM stall converter?
With a 5500 RPM stall converter?
What is good today, say with a stock converter?
With a 3500 RPM stall converter?
With a 5500 RPM stall converter?
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From: Gainesville, Florida # of drag strips runs: ?!?!?
I launch with my stock convertor between 900-1000. The Nova has a 3400 stall 10" convertor, and I launch between 1800-2000. You want to have some flash on the stall, but not have it so high it just pushes through the beams.
Derek
Derek
Originally Posted by Villain281H
I launch with my stock convertor between 900-1000. The Nova has a 3400 stall 10" convertor, and I launch between 1800-2000. You want to have some flash on the stall, but not have it so high it just pushes through the beams.
Derek
Derek
Originally Posted by Villain281H
when footbraking it, that's about right. When/if transbraking it, go as close to the stall rpm if your suspension can handle it.
Derek
Derek
Any idea way you want to go higher with a trans brake? Is it because the locked transmission can hold it but the brakes won't? I guess that makes sense ... at some point sticky 10" slicks should be able to push skinny front tires right on through the lights.
Do you still get the flash effect running the engine that near stall? For that matter, is the flash effect useful for more than lifting the front wheels for a few feet?
Originally Posted by critter
Thanks for the reply! This thread is getting looks, so somebody besides me must care
Any idea way you want to go higher with a trans brake? Is it because the locked transmission can hold it but the brakes won't? I guess that makes sense ... at some point sticky 10" slicks should be able to push skinny front tires right on through the lights.
Do you still get the flash effect running the engine that near stall? For that matter, is the flash effect useful for more than lifting the front wheels for a few feet?
Any idea way you want to go higher with a trans brake? Is it because the locked transmission can hold it but the brakes won't? I guess that makes sense ... at some point sticky 10" slicks should be able to push skinny front tires right on through the lights.
Do you still get the flash effect running the engine that near stall? For that matter, is the flash effect useful for more than lifting the front wheels for a few feet?
Yes, the use of a transbrake allows you to bring the RPM up much higher than you would foot-braking it. You cannot bring a motor up to the converter's stall speed while holding it still at the tree just using the brakes. Well before the stall speed, the car will start to buck and then push your front tires through the beam and trip the lights.
I have best luck on 3200-3500 stalls launching from about 1100.
That lets teh converter do its job of flashing and getting you out of the hole!!
Best 60' is 1.50 in the Iroc with 3.73 gears and stock 10 bolt. Converter is a Coan 10'' 3200
Chris
That lets teh converter do its job of flashing and getting you out of the hole!!
Best 60' is 1.50 in the Iroc with 3.73 gears and stock 10 bolt. Converter is a Coan 10'' 3200
Chris
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Originally Posted by NufNuffZ28
I have best luck on 3200-3500 stalls launching from about 1100.
That lets teh converter do its job of flashing and getting you out of the hole!!
That lets teh converter do its job of flashing and getting you out of the hole!!
.
Best 60' is 1.50 in the Iroc with 3.73 gears and stock 10 bolt. Converter is a Coan 10'' 3200
Chris
Chris
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Joined: Dec 2004
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From: Palm Harbor,Tampa
Originally Posted by NufNuffZ28
I have best luck on 3200-3500 stalls launching from about 1100.
That lets teh converter do its job of flashing and getting you out of the hole!!
Best 60' is 1.50 in the Iroc with 3.73 gears and stock 10 bolt. Converter is a Coan 10'' 3200
Chris
That lets teh converter do its job of flashing and getting you out of the hole!!
Best 60' is 1.50 in the Iroc with 3.73 gears and stock 10 bolt. Converter is a Coan 10'' 3200
Chris
1.5 60' mother of god
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From: Gainesville, Florida # of drag strips runs: ?!?!?
I've tried mine between 1600 and 2000 rpm and the et's don't vary much, but the reaction time does, and since I bracket race the car, I'm concerned with that. the most I've ever gotten it to hold on the footbrake is 2500 rpm, but it was leaning HARD!
Derek
Derek
Not a great launch....I had some spin, but here is a video with a 1.59.
http://www.hpjvids.com/humor/nufnuff.wmv
Chris
http://www.hpjvids.com/humor/nufnuff.wmv
Chris
Staging Lane
Joined: May 2005
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Originally Posted by NufNuffZ28
Not a great launch....I had some spin, but here is a video with a 1.59.
http://www.hpjvids.com/humor/nufnuff.wmv
Chris
http://www.hpjvids.com/humor/nufnuff.wmv
Chris
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Joined: Feb 2005
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From: Amite, La
I use a TCI Super Street Fighter (3500- 3800 stall) on my footbrake combo. I launch about 1800- 2000 rpm. Just enough to clear his throat and it helps avoid any bog situation. My older car was a quite bit quicker and had a 5500 stall, but it launched and responded much better when I nailed it off idle. I too, agree with Villian.
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From: Midland, TX
I'm about to get a 3800 stall with a high STR. Hopefully with the high STR I won't have any bogging problems, just traction problems. I need a big stall because my car has 2.73s and is running a 13.7 1/4. I know its slow but I'm still working on it. How high do you think I could foot stall with a 3800 lock up converter?
I need a big stall because my car has 2.73s and is running a 13.7 1/4. I know its slow but I'm still working on it. How high do you think I could foot stall with a 3800 lock up converter? 
Joined: Dec 2001
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From: Central Indiana Honors: 4th grade spelling bee contestant
I launch my stock converter at 1,000 RPM. I used to just launch at idle when I had 2.73's, but since I switched to 3.73's that changed. If I don't launch it at 1,000 RPM, the car falls flat on it's face.
