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Old 07-14-2004, 12:10 AM   #1
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Launching RPM

What do you guys normally launch at for the optimal speed?
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Old 07-14-2004, 12:17 AM   #2
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4500.
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Old 07-14-2004, 02:44 AM   #3
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what car and tires? i launch at above 2,000 withstreet tires and 5,000rpms with slicks.
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Old 07-14-2004, 04:37 AM   #4
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I've found that with street tires, its best to launch at about 2000 rpms. It gives the tires perfect amount grip and really launches the car. I had a buddy try it in his 00 V6 when I was in Omaha and he was getting 1.8sec 60' times.
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Old 07-14-2004, 07:36 AM   #5
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500.


I'm an over achiever.
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Old 07-14-2004, 11:12 AM   #6
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Quote:
Originally Posted by Dom
500.


I'm an over achiever.
500 what?
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DAMN Those are some old *** numbers!!! I need updated ones!!
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Old 07-14-2004, 11:46 AM   #7
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500 RPMs.
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Old 07-14-2004, 12:01 PM   #8
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I'm not familiar with the term launching, but I am thinking it may be to rev your engine to a specified rpm and take of from desired rpm of 2000, seems to be for most vs idle of about 700. What's launching? Those that replied to me in increasing speed, thanks for setting on track and painting a realistic pic. So even with a supercharger and nitrous you won't get that fast?
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Old 07-14-2004, 12:26 PM   #9
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launching is going forward off the line. it's the single most important part of drag racing. balancing the line between bogging and burning rubber on street tires isn't easy. the best launch for a v6 (stock) is about 2,000. bring it to 2,000rpms and keep it there. when the light turns green, quickly slip the clutch and try not to bog or give it too much gas so she just spins.

to give you an indication how important launches are, my car that makes 175rwhp/200rwtq often beats stock and bolt on 5.0's (more power and lots more tq than me) simply because they suck at launching. i get the jump on them early on and they have to play catch-up.

austin
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Old 07-14-2004, 12:54 PM   #10
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Quote:
Originally Posted by Dom
500 RPMs.
You launch at 500 rpms? How is that possible? You car idles at like 700. Anything less and your car would die.
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DAMN Those are some old *** numbers!!! I need updated ones!!
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Old 07-14-2004, 12:57 PM   #11
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I am the god of clutch.

I launched it last night like that moving my car from under a tree.
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Old 07-14-2004, 02:57 PM   #12
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haha thanks alot i have heard that it was around 2 although that seemed a little low. I gues thats what happens when you try and beat your friends bmw's.
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Old 07-14-2004, 03:04 PM   #13
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I know **** about cars but somehow I thought that would be of convinience. I just can't figure out how to do it on an automatic, anyone? How do I launch on an automatic? Maybe neutral and then hitting the D?
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Old 07-14-2004, 03:04 PM   #14
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if you want to tear up your transmission.


you need a stall converter.
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Old 07-14-2004, 03:07 PM   #15
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how much do stall converters cost and how do i use them? How will it allow me to rev to 2k rpm and launch?
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Old 07-14-2004, 03:11 PM   #16
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Quote:
Originally Posted by 97Stallion
I've found that with street tires, its best to launch at about 2000 rpms. It gives the tires perfect amount grip and really launches the car. I had a buddy try it in his 00 V6 when I was in Omaha and he was getting 1.8sec 60' times.
1.8 60' times? What kind of tires was he on? I usually launch at 2.5K rpms and I dont burn the tires too bad and I dont bog at all. I still am only able to manage 2.3 60'. I know I would see a 14 second pass if I was able to get my 60' down. Any suggestions on how to do this?
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Old 07-14-2004, 03:30 PM   #17
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Quote:
Originally Posted by megax29
how much do stall converters cost and how do i use them? How will it allow me to rev to 2k rpm and launch?
I know nothing about autos. I barely know anything about manuals.

But basically, you have a torque converter between your engine and transmission that is covered by the bell housing. The torque converter does what it says it does. It converts torque to the wheels.

It works like having two fans placed in front of each other and having one on. The both spin. When both fans reach the same speed, it's called a stall speed. That's when it shifts.

Or atleast, that's how I understood it on Popular Hot Rodding TV.
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Old 07-14-2004, 03:38 PM   #18
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to my understanding a stall converter does what the manual guys are doing..it revs the engine more to raise the rpms thus u will have a quicker launch off the line like manuals can do.
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Old 07-14-2004, 03:42 PM   #19
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Quote:
Originally Posted by 1quick6
1.8 60' times? What kind of tires was he on? I usually launch at 2.5K rpms and I dont burn the tires too bad and I dont bog at all. I still am only able to manage 2.3 60'. I know I would see a 14 second pass if I was able to get my 60' down. Any suggestions on how to do this?
try doing it at 2000 and you'll be amazed. You have a 5-speed I assume. Just dump the clutch completely. My friend was on street tires. Normal radials that is.
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DAMN Those are some old *** numbers!!! I need updated ones!!
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Old 07-14-2004, 03:43 PM   #20
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Quote:
Originally Posted by 1quick6
1.8 60' times? What kind of tires was he on? I usually launch at 2.5K rpms and I dont burn the tires too bad and I dont bog at all. I still am only able to manage 2.3 60'. I know I would see a 14 second pass if I was able to get my 60' down. Any suggestions on how to do this?
1.8's are possible with drag radials and some torque and practice. (it took me some drag suspension and slicks to get to mid 1.8's. :-/ ) that's a HELL of a launch for street tires obviously. i don't have any reason to be mean and call a "BS" but don't be aiming for that, because that's some skill and luck right there. a 2.3 isn't a horrendous 60'. keep on practicing and put tires to correct psi (and get good tires!). 2.2 60's are about the best i've seen on stock tires and stock car. i only pulled a couple mid 2.2's when i was stock.

austin
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Old 07-14-2004, 03:46 PM   #21
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Quote:
Originally Posted by tire
1.8's are possible with drag radials and some torque and practice. (it took me some drag suspension and slicks to get to mid 1.8's. :-/ ) that's a HELL of a launch for street tires obviously. i don't have any reason to be mean and call a "BS" but don't be aiming for that, because that's some skill and luck right there. a 2.3 isn't a horrendous 60'. keep on practicing and put tires to correct psi (and get good tires!). 2.2 60's are about the best i've seen on stock tires and stock car. i only pulled a couple mid 2.2's when i was stock.

austin
OK, you don't have to believe me. But he did. I'll see If I can get his timeslip. They weren't the stock tires BTW. I think they were some 245/45ZR17's.
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DAMN Those are some old *** numbers!!! I need updated ones!!
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Old 07-14-2004, 03:50 PM   #22
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ok but if i'm on P my idle is 700rpm. i switch to d and hold the brake (automatic) and the rpm will still be 700rpm. with the stall converter, how do i use it? If I release the brake and slam the gas it won't burn out at all but I wouldn't be launching either and you all claim benefit from launching at 2000rpm. How do I launch w/ and automatic from 2k?
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Old 07-14-2004, 03:59 PM   #23
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You hold the brake and press the gas. Your car won't move until around 2000rpms. You hold it there until green, let off the brake, and floor the gas.
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Old 07-14-2004, 04:09 PM   #24
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I think it'll go into a "power brake" and spin. I'll have to experiment. So I should hold the break and give bit of gas but not enough to make it burn rubber right. Let go on green. Can someone agree to this method I don't wanna **** my **** up. I was experimenting with gears earlier.
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Old 07-14-2004, 04:17 PM   #25
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You just don't give it enough gas to spin the tires.
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Old 07-14-2004, 04:18 PM   #26
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It's a Ford auto. I haven't seen to many of them last long.
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Old 07-14-2004, 04:27 PM   #27
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laser wouldnt lie to you...
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Old 07-14-2004, 04:39 PM   #28
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I believe you cuz when I'm at a red light sometimes I hold the break and give gas. I like the way the car moves and sounds. I sometimes slightly give gas before letting go of the break and I feel a jumping feeling forward. I'll experiment on the way home from work and talk about results tomorrow. How much time saved do you think I'd get from this on the 1/4 mile? You guys know any other driving techniques for an automatic I should now about?
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Old 07-14-2004, 04:53 PM   #29
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If i use laser 02s technique is there need for a stall converter, if so how will I benefit from it?
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Old 07-14-2004, 04:54 PM   #30
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I have a feeling the car will move if I give gas, how about applying the hand brake?
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Old 07-14-2004, 05:48 PM   #31
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The car should not ever move. Your front brakes will stop it. If anything your rear wheels will just spin once you overpower the rear brakes.

You don't need a stall converter but it will help and allow you to launch higher. I think, stock, I could only launch at like 1700rpms.

And the handbrake won't do anything. It will be easily overpowered by the rear wheels.
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Old 07-15-2004, 11:08 AM   #32
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I just got to work a while ago and tried giving gas while holding the break and I got to 1600-1700rpm before rear wheels began to spin. It moved a little but I think brake wasn't pressed hard enough. I was disappointed with the response I got after releasing the brake. Question: In racing techniques, launching at 1600rpm seems to be best I can do so after releasing the brake should I floor the gas all the way or increase steadily?
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Old 07-15-2004, 01:46 PM   #33
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Let go of the brake fast and floor the gas.
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Old 07-15-2004, 06:18 PM   #34
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if you want to race an automatic, then YES, you need a converter
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Old 07-15-2004, 07:01 PM   #35
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Launch 6500rpms
flash convertor to 6800 (stall speed)
shift at 7800 then at 8000

BUT..... LOL
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