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Dragstrip and Launch Techniques Discussion 1/4 mile, 1/8 mile, launch discussions.

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Old 08-11-2012, 09:48 AM   #1
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Launch RPM with 325 M&H DR's

Got some time to kill, so I thought I would ask this. I am soon going to be adding 17x 10 Weld with 325/45R17 DR's. I am around 470 rwhp m6 trans and gforce 9 inch kit with 4.11 gear. Running a Textralia oz 700 HD clutch. What Rpm should I be shooting for on the launch without grenading tranny? Thanks for any input!
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11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 10:28 AM   #2
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I'd hold it around 2000 rpm. Then feather the clutch out very quickly ( third yellow start ). Don't just dump the clutch, the car will fall on its face and probably stall.
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Old 08-11-2012, 11:22 AM   #3
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I already launch 2500 - 2800 on Invos with minimal spin for a 1.90 60'. Hoping for 1.6x to 1.7x 60'. Guess I'm more concerned about how much abuse the stock m6 tranny can take. Any moderate powered racers out there with more input or experiences?
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11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 11:32 AM   #4
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I have 628 rwhp, my tranny is fine. I have 14000 miles on my car. I have lingenfelters ZR1 clutch.
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Old 08-11-2012, 11:53 AM   #5
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I have 628 rwhp, my tranny is fine. I have 14000 miles on my car. I have lingenfelters ZR1 clutch.
That's good to hear! I guess its all how you slip the clutch. Do you have DR's? What kind of times are you getting?
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11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 06:09 PM   #6
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I have nitto nt05r DR, best 60' was a 1.6? Can't remember exactly. I haven't raced this year yet. I'm waiting on the weather to cool down some here. My best time last year was 11.89, but that was with a slipping clutch and broken spider gears in my rear. Since then, I've put the DSS 9' rear in and put lingenfelters ZR1 clutch and flywheel in. Hoping for much better times this year. I'd like to see low 11's and maybe a high 10.

If your rear is stock, I'd be very careful with DR. I think my rear lasted 8 passes.
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Old 08-11-2012, 07:15 PM   #7
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I have nitto nt05r DR, best 60' was a 1.6? Can't remember exactly. I haven't raced this year yet. I'm waiting on the weather to cool down some here. My best time last year was 11.89, but that was with a slipping clutch and broken spider gears in my rear. Since then, I've put the DSS 9' rear in and put lingenfelters ZR1 clutch and flywheel in. Hoping for much better times this year. I'd like to see low 11's and maybe a high 10.

If your rear is stock, I'd be very careful with DR. I think my rear lasted 8 passes.
Thanks for the info! I am running full Gforce 9 inch kit with 4.11 gears. Looking for low 12's or high 11's.
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Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei
11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 07:27 PM   #8
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How you like the 4.11? I went with 3.70 and wishing I went with the 4.11
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Old 08-11-2012, 07:30 PM   #9
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I'd take it off the line at about 3500-3800 rpm
I pulled 5 consececutive 1.6xx 60 foot times on 18 inch drag radials Nto5r
Photos of time slips on the 60 foot recoed.
It took 662 ft lbs of torque to damage my trans.
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Old 08-11-2012, 07:41 PM   #10
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How you like the 4.11? I went with 3.70 and wishing I went with the 4.11
Made the car much nicer to drive, snappier. Doesn't drive like a 4000 lb car! Going from a 3.70 to 4.11 may not be noticeable right away, but would definitely show in et. I gained et and didn't lose any mph.
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Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei
11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 07:43 PM   #11
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Quote:
Originally Posted by jam3 View Post
I'd take it off the line at about 3500-3800 rpm
I pulled 5 consececutive 1.6xx 60 foot times on 18 inch drag radials Nto5r
Photos of time slips on the 60 foot recoed.
It took 662 ft lbs of torque to damage my trans.
That's about what was thinking of starting at. Thanks. I'm sure I'll entertain the track crowd with a few bogs at first!
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Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei
11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-11-2012, 07:48 PM   #12
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you will get it. dont worry about racing the car next to you. Just drive yours!
Good luck!
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Old 08-12-2012, 03:44 AM   #13
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Just drive the car you sissy!

You've seen how I drive mine and I've got 49K miles on it and we are at the same power level ......... For now ........ Looks like the turbo will be going on shortly.




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Old 08-12-2012, 06:23 AM   #14
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Just drive the car you sissy!

You've seen how I drive mine and I've got 49K miles on it and we are at the same power level ......... For now ........ Looks like the turbo will be going on shortly.




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Thanks Rick, lol. Don't worry, the car gets beat on plenty. Its been down the track a lot on street tires!

Get any time slips with that new cam in the car yet? I would love to be able to run at sea level. Lol
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2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei
11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-12-2012, 11:09 AM   #15
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I hold between 3800 and 4k, still running a stock clutch. Thats on 305/35/18 MT ET Streets.
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Old 08-12-2012, 01:50 PM   #16
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Thanks Rick, lol. Don't worry, the car gets beat on plenty. Its been down the track a lot on street tires!

Get any time slips with that new cam in the car yet? I would love to be able to run at sea level. Lol
Local track isn't opened back up yet. They are building a "sound barrier" to keep the asshat that filed a lawsuit against the track happy.

A guy filed a lawsuit 15 years ago saying the noise level was a hazard to his kids that were around 10, after he bought a house 1/4 mile from California Speedway and drag strip. That case was quickly tossed out of court.

About a year ago, he moved CLOSER to the track, kids are grown and on their own, and he filed again. This time, the track is shut down.

I can't think of another state that would listen to someone who bought a second house that was closer to the source of his original complaint.

Needless to say, there are quite a few people anxiously awaiting the re-opening of the strip. You know two of them.
I can't say the same for their wives though. lol

I made the drive from there to Vegas in a day, driving in a Saab 97x SUV and having to drive like grandma. Vegas is only a 3 hour "spirited" drive from here so I have faith that you can make it in a day.

You wouldn't have to even get a room.

Any time you get froggy and want to bring the beast out here you are more than welcome. I could only imagine the kind of trouble that would follow 3 IOM Camaros. lol

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Old 08-12-2012, 02:19 PM   #17
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Local track isn't opened back up yet. They are building a "sound barrier" to keep the asshat that filed a lawsuit against the track happy.

A guy filed a lawsuit 15 years ago saying the noise level was a hazard to his kids that were around 10, after he bought a house 1/4 mile from California Speedway and drag strip. That case was quickly tossed out of court.

About a year ago, he moved CLOSER to the track, kids are grown and on their own, and he filed again. This time, the track is shut down.

I can't think of another state that would listen to someone who bought a second house that was closer to the source of his original complaint.

Needless to say, there are quite a few people anxiously awaiting the re-opening of the strip. You know two of them.
I can't say the same for their wives though. lol

I made the drive from there to Vegas in a day, driving in a Saab 97x SUV and having to drive like grandma. Vegas is only a 3 hour "spirited" drive from here so I have faith that you can make it in a day.

You wouldn't have to even get a room.

Any time you get froggy and want to bring the beast out here you are more than welcome. I could only imagine the kind of trouble that would follow 3 IOM Camaros. lol

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Our dragstrip complaint days are coming soon I bet. Half million + dollar homes are just to the south of our track now. But for now, the track is the best it has been in years!

We'll have to set some bail money aside if all 3 of our IOM Camaros get together! Lol
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Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei
11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.
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Old 08-13-2012, 12:25 AM   #18
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lol!

How were you launching on the stock tires? I'm having a harder time than I thought I would getting used to the cam and clutch at the same time.

It seems like I have to rev the hell out of it and slip the clutch, but I always wind up smelling the clutch afterwards.

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Old 08-16-2012, 10:18 PM   #19
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I launch at 3800 with these exact tires. Anything lower and my car bogs down.

1.7 60"s very consistant which I guess isn't bad for my track that is usually around 9,000DA and almost 6K feet above sea level.
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