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

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Old 05-31-2010, 07:55 PM   #1
Supercharged SS
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Slick vs Drag Radial = no improvement

Just wanted to post this quick so you guys would no what the deal was. The car being used is an A6, still with the L99,(no ls3 conversion), TVS 2300, stock gears and converter. The car makes 550 rwhp/ 550 rwtq. With the 18" M & H drag radials the car cut 1.60 to 1.67 60's every time out. I changed over to 17" Bogarts with a 28"x10" Hoosier Slicks and the car still only cuts a 1.65 60'. 11 attempts with both set-ups. I think the problem is that I can't leave any harder than 1450 rpms otherwise the car pushes itself down the track. I mean literally. With the front tires completely locked, the car will push itself forward. It happened a lot at Jannetty's rental this past Friday. So I would say that unless you have a stall don't waste your money on a 17" set-up. Its just not worth it when for half the price you can do just as well, if not better. Best of luck fellas!
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Old 05-31-2010, 07:58 PM   #2
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Its because of the stock stall. But once stalled them bias ply sidewalls will take alot of the cars beating not transfering it to the drive line like radial tires will.
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Old 05-31-2010, 08:12 PM   #3
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did you gain any mph? the rolling weight should have helped. what's the best it ran? post the slip maybe?
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Old 05-31-2010, 08:20 PM   #4
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The car ran between 11.0 and 11.2 @ 122-124 mph. No improvement anywhere. That's why no slips, nothing gd to show. The temps were 35 degrees warmer than the last time so that didn't help. I know the converter is the culprit. It's holding the car back. Well it did until this week,
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Old 05-31-2010, 08:42 PM   #5
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So you wanna sell your bogarts?
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Old 05-31-2010, 08:46 PM   #6
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I can't. I'm just going to get a stall and put them to the test. You should just order a set. They make them pretty quick.
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Old 05-31-2010, 08:53 PM   #7
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what type/size of stall are you planning to get?
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Old 05-31-2010, 08:57 PM   #8
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yea your stock converter is what's killing you.......you need to be able to launch a lot harder to make use of that extra grip.


may i suggest..........3200 stall and a transbrake?
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Old 05-31-2010, 08:58 PM   #9
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Not sure yet. Prob at least a 3k or 3200. Not sure yet on a single or triple or the str. I plan on making some calls in the am.
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Old 06-01-2010, 08:47 AM   #10
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Drive a 4000-4200, really before you go with a small 3k stall. They're plenty bearable and with a lockup clutch drive the same on the highway.

Add a trans cooler!
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Old 06-01-2010, 12:34 PM   #11
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Keep us informed with your finding on the torque converter options. I'm curios to see more pros and cons for the multi vs single disk setups. I also have found that alot of manufacturers don't give the STR in the specs. I only found this info for Yank and Vigilante.
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Old 06-01-2010, 03:43 PM   #12
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Not sure yet. Prob at least a 3k or 3200. Not sure yet on a single or triple or the str. I plan on making some calls in the am.
At least a 3600.
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Old 06-01-2010, 04:27 PM   #13
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3600 is way to high for my car. It would def blow the tires off. I don't think it would hook very well with anything above 3k. Jannetty suggested a 2200. I have a call into pro torque. Just waiting now but they claim to have a hot setup for the 2010 camaro.
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Old 06-01-2010, 04:45 PM   #14
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Quote:
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3600 is way to high for my car. It would def blow the tires off. I don't think it would hook very well with anything above 3k. Jannetty suggested a 2200. I have a call into pro torque. Just waiting now but they claim to have a hot setup for the 2010 camaro.

Call Yank and Vigilante for some info. For one of the best knowledge bases call Neal Chance Torque Converters. A 2200 stall is very low.

This is my < .02 so take it as such:

1) Make sure the converter is still a lockup converter. That will make it 100% streetable.

2) You can never go "up" in stall speed, but you can go down. e.g. If you brake against a converter you effectively can pull it down some. We used to do this and preload the tires and drivetrain. A converter's stall speed is really based on "flashing the converter"

3) Treat your car as a total package. You will want to tune your cars launches with the SUSPENSION, not the engine or converter. There are cars that run in the 7's with IRS.

I am running a 3500/3600 stall with transbrake which is totally streetable. (and the SST has enough torque to kill a horse) You may not want to run that high, but for a whole generation the B&M Holeshot was a 2800-3200 stall converter and the Super Holeshot was a 3500 stall converter and they sold tens of thousands of these on street cars.

Once again, I want to emphasize this is humble opinion only, so call up some chassis/drivetrain pros and get their take.
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Old 06-01-2010, 04:50 PM   #15
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Which wheels did you use on your 18" set-up and do you still have the SS brembos on the car?
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Old 06-01-2010, 05:30 PM   #16
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You should be able to lower the torque percent in first to get it to hook. You dont want to end up regreting going with such a small converter. As stated above you can do other things to get it to flash sooner or simply turn down torque tables in first if needed. I think you will still want more with the right tire and a 3600 stall. Just my opinion as well.
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Old 06-01-2010, 08:12 PM   #17
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On the 18" wheels. They were the C6 Z06 ones and yes the fir over the Brembos with no problems and you don't need spacers. I agree that a 220 is way to low. I was thinking around 3k. I have the only 17" slicks currently being made so I can not change that. The dead hook right now. But I can't leave hard at all. Speedster, I can't thank you enough for all your help. Problem is that most of that went right over my head. I was planning on a lockup converter. Ive had some bad experiences with a single plate. Believe it or not the stock suspension works pretty good. I haven't had any issues to date. We'll see if that continues with a stall.

Here's my question. Would I be better off doing a converter or adding about 50 more rwhp? I like to do one thing at a time and see the difference. Maybe the extra hp will help the launch a little but help with my ET. Any thoughts?
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Old 06-01-2010, 11:14 PM   #18
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use the Ebrake along with the foot brake,,,,might be able to raise the rpms alittle?
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Old 06-02-2010, 08:09 AM   #19
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Drive a 4000-4200, really before you go with a small 3k stall. They're plenty bearable and with a lockup clutch drive the same on the highway.

Add a trans cooler!
The trans cooler is a MUST! I've run 10.6's with a 3400 Yank SS converter. Unless the car spends more time at the track than it does on the road then I would think a 4000-4200 is a bit too much.
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Old 06-02-2010, 11:56 PM   #20
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SuperchargedSS, where can I get the C6 Z06 wheels? You got a website? Specific year?

Did you have to drill the stud hole out larger to fit the Camaro studs?
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Old 06-03-2010, 05:10 AM   #21
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18" Z06 wheels

http://www.corvetteguys.com/c6z06-ch...-18x95-40.html


No drilling, no anything. Just bolt them up and go!
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Old 06-03-2010, 09:40 AM   #22
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What are all you guys paying for a converter install?
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Old 06-03-2010, 10:49 PM   #23
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Thanks for the link!
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