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

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Old 08-18-2013, 07:07 PM   #1
newagemuscle
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Well… first time out to the strip with the blower

As the title says, I took my car to the track finally to see what she would do. I was somewhat happy but felt I could have done better if I had more time. I only got to make two passes. My first was a 12.20 @ 118 and my second was a 12.03 @ 119. It was an 80 degree day and I drove the car for two hours to get to the track and never let it cool down. It was on a week day after work so I got there late. I was running on the stock tires and my best 60ft was 2.00. I know I could have done better but I just did not have the time to stick around. I was not spinning the tires… problem was it was hooking so good my car was bogging. I only launched it at 1300rpms which almost felt like I was coming out of the hole at idle. I was playing safe because I thought I would spin the tire. I hope to get back on a cooler day and let it sit for a while before making a pass. I am also going to be picking up some Nitto 555r’s so I can launch even harder.

Here was my first run.


Here is my second (12.03) run.
https://www.facebook.com/video/embed...01031400800174

<iframe src="https://www.facebook.com/video/embed?video_id=10201031400800174" width="1280" height="720" frameborder="0"></iframe>

https://www.facebook.com/#!/photo.ph...type=2&theater

https://www.facebook.com/#!/photo.ph...type=2&theater

<iframe src="https://www.facebook.com/video/embed?video_id=10201031400800174" width="1280" height="720" frameborder="0"></iframe>
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Old 08-18-2013, 07:33 PM   #2
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Heat is a killer with a supercharged car. In cooler weather and good launch, your car will run low 11's.
Keep it up.
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Old 08-18-2013, 11:44 PM   #3
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What tune?
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Old 08-19-2013, 05:58 AM   #4
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What tune?
I had Alternative Performance (Lideo) here in Michigan do my tune.
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Old 08-19-2013, 06:06 AM   #5
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As the title says, I took my car to the track finally to see what she would do. I was somewhat happy but felt I could have done better if I had more time. I only got to make two passes. My first was a 12.20 @ 118 and my second was a 12.03 @ 119. It was an 80 degree day and I drove the car for two hours to get to the track and never let it cool down. It was on a week day after work so I got there late. I was running on the stock tires and my best 60ft was 2.00. I know I could have done better but I just did not have the time to stick around. I was not spinning the tires… problem was it was hooking so good my car was bogging. I only launched it at 1300rpms which almost felt like I was coming out of the hole at idle. I was playing safe because I thought I would spin the tire. I hope to get back on a cooler day and let it sit for a while before making a pass. I am also going to be picking up some Nitto 555r’s so I can launch even harder.

Here was my first run.
You don't want to leave any higher than about 1000-1100 rpm. With the steep first gear all you will do is spin the tires. You also need to cool the car down. Not only will you loose performance but without a trans cooler you will cook it.
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Old 08-19-2013, 06:19 AM   #6
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You don't want to leave any higher than about 1000-1100 rpm. With the steep first gear all you will do is spin the tires. You also need to cool the car down. Not only will you loose performance but without a trans cooler you will cook it.
I agree on the cool down. It was running very hot. I would have like to try and leave harder though. The track was so sticky that I could hardly turn them over when I was trying to do a burnout. When I would launch at the low rpms I was leaving at, the car would just fall on its face and bog after I left the line. It just seemed like I could have left harder. Who knows... maybe the tires would have spun. I would like to go back with some cooler weather, drag radials, and let the car sit and cool this time so I can atleast get into the 11's.
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Old 08-19-2013, 06:47 AM   #7
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I agree on the cool down. It was running very hot. I would have like to try and leave harder though. The track was so sticky that I could hardly turn them over when I was trying to do a burnout. When I would launch at the low rpms I was leaving at, the car would just fall on its face and bog after I left the line. It just seemed like I could have left harder. Who knows... maybe the tires would have spun. I would like to go back with some cooler weather, drag radials, and let the car sit and cool this time so I can atleast get into the 11's.
You can try and leave harder if you don't mind throwing a pass away. With the TVS blower on an L99 you can't leave any higher than 1000-1100. It goes for the whipple as well. Feel free to get some other opinions of owners that have made a few hundred passes with a pd blower on a 6l80 car.
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Old 08-19-2013, 07:12 AM   #8
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jamie-ls3-do i need to say more-
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Old 08-19-2013, 07:14 AM   #9
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jamie-ls3-do i need to say more-
?
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Old 08-19-2013, 08:00 AM   #10
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What rwhp are you at? (I can't see sigs on my phone if its in there.) I'm right at 620rwhp and our first time out was similar. My best run was 11.80 @ 120.5 on stock tires with a 1.93 60'. It was well over a 100* but it felt like there was a lot more that I should have gotten out of it.

What pressure were you running the tires? I think I was at 26 psi but its been a while. :(


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Old 08-19-2013, 08:05 AM   #11
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You can try and leave harder if you don't mind throwing a pass away. With the TVS blower on an L99 you can't leave any higher than 1000-1100. It goes for the whipple as well. Feel free to get some other opinions of owners that have made a few hundred passes with a pd blower on a 6l80 car.
What do you mean by throwing a pass away? I would just assume if the tires are hooking at the current rpm and the car is bogging that you would want to try and up the rpm's a little bit.
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Old 08-19-2013, 08:10 AM   #12
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What rwhp are you at? (I can't see sigs on my phone if its in there.) I'm right at 620rwhp and our first time out was similar. My best run was 11.80 @ 120.5 on stock tires with a 1.93 60'. It was well over a 100* but it felt like there was a lot more that I should have gotten out of it.

What pressure were you running the tires? I think I was at 26 psi but its been a while. :(


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My car made 547rwhp. I ran on the stock tires with them at 22psi. My best 60ft was 2.00.
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Old 08-19-2013, 09:03 AM   #13
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you weren't making that much HP if it was hot. In a nutshell, a hot engine beat on will result in timing pulled more than likely. Also, a roots blower makes heat...and if its hot, well...it's even hotter. Hot tranny makes for bad clutch wear.
I always give it 20min between runs.
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Old 08-19-2013, 10:08 AM   #14
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you weren't making that much HP if it was hot. In a nutshell, a hot engine beat on will result in timing pulled more than likely. Also, a roots blower makes heat...and if its hot, well...it's even hotter. Hot tranny makes for bad clutch wear.
I always give it 20min between runs.
Well... I probably had a 20 min break from the time I checked in and had my car inspected, but regardless I understand what you are saying. It was not an optimal day to run the best the car has for many reasons. It was just the first chance for me to get it out and have some fun. heck... I even had two child seats in the car on those passes. That had to be slowing me down. My boys enjoyed seeing their dad go down the track regardless how I ran. For now I will wait for some cooler weather and see what she does in fall.
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Old 08-19-2013, 10:40 AM   #15
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jamie-ls3-do i need to say more-
DOH!!!!
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Old 08-19-2013, 10:42 AM   #16
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Sorry Newage. I thought you had an automatic. Yeah, def leave harder than 1300. No doubt that was bogging the car. Practice, practice, practice. You'll def be in the 11's. My car at 545 rwhp went 10.99 at 124.83. So you have room for improvement.


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Old 08-19-2013, 02:36 PM   #17
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yup...you'll get it man. My girls watched me race at the track once last year...loved it.
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Old 08-19-2013, 07:53 PM   #18
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?
jamie, got the msg...he was giving you advice on leaving with a a6 tranny, ls3 are m6...been running a m6 sometime, def a challenge to slip it out the hole, not enough gas and it will bog, to much and it will spin...i found the only way is to get it around the 2500rpm area and you will have to ride the clutch a little....best 60ft i got was a 1.6...low end torque makes it difficult not to spin, and i usually did not powershift at 6300, as it caused more spin, i would shift around 6000 and let off a little..this was with 18in drs, set of slicks, would be a different answer..i would balls out and see what happens..be prepared to shorten your lifespan on a stock clutch..it don,t like to slipped at track..best i could get was 11.3 at 127mph..had the top end , but 60ft and traction was a issue
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Old 08-21-2013, 06:16 AM   #19
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jamie, got the msg...he was giving you advice on leaving with a a6 tranny, ls3 are m6...been running a m6 sometime, def a challenge to slip it out the hole, not enough gas and it will bog, to much and it will spin...i found the only way is to get it around the 2500rpm area and you will have to ride the clutch a little....best 60ft i got was a 1.6...low end torque makes it difficult not to spin, and i usually did not powershift at 6300, as it caused more spin, i would shift around 6000 and let off a little..this was with 18in drs, set of slicks, would be a different answer..i would balls out and see what happens..be prepared to shorten your lifespan on a stock clutch..it don,t like to slipped at track..best i could get was 11.3 at 127mph..had the top end , but 60ft and traction was a issue
When you ran that 11.3 @ 127 what were your mods and rwhp? Thats pretty darn good. I just wonder how much not letting the car cool down was hurting me. I guess I'm wondering how much of a gain will be made on a cool day with letting the car sit for a while. I'm new to the supercharger thing and from what everyone is saying these things do not like heat. The 1/4 time is one thing, but I was expecting more than 119mph out of the car. I assume the heat has a lot to do with that though.
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Old 08-21-2013, 07:11 AM   #20
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Milan or Lapeer ? I know nothing about s/c motor but try a 2K launch next time.I was launching at 2 k and it seemed to bog 3 k spin headers tune stock rubber .114.6 trap time cool day (?70) I bet a cooler day and some time trying different launch methods you will be in the 11"s
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Old 08-21-2013, 08:25 AM   #21
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Milan or Lapeer ? I know nothing about s/c motor but try a 2K launch next time.I was launching at 2 k and it seemed to bog 3 k spin headers tune stock rubber .114.6 trap time cool day (?70) I bet a cooler day and some time trying different launch methods you will be in the 11"s
I was at Milan. I swore 10 years ago I would never go back to Lapeer and I did anyway. The way I look at that track (Lapeer) is if you want to feel good about your car and justify the money you spent on it… that's the place to run. If you REALLY want to know how fast your car is go to a real track like Milan. I know a lot of people do not like to hear that, but it is true. It’s close and convenient for some, but there is no comparison. That track has always been off one way or another. Milan is a true NHRA track that is prepped for drag racing. That is why I was so hesitant on my launch. I was not sure what RPM because I thought I would spin based off running at Lapeer with just headers. I needed to launch a lot harder. I just did not have the time. The track was so sticky I was actually bogging big time out of the hole. My brother was running on DR’s and hot happing 11.70’s with pretty much the same set up and 50 less RWHP on his Mustang. He was getting a best 60ft of 1.81 and could have still come out a lot harder. Whatever they did to prep the track that day I hope they do the next time I am there. We never had the time to cool the cars down. I am going to wait until we have some cooler weather and head back, but with some Nittos this time.

As for launching I am at least to try 2000 rpm’s and go from there. My mph seemed down probably because of the heat. Also, I was comparing it to Lapeer where it was doing 12.52 and a best mph of 115.2 with just headers, CAI, and tune.
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Old 08-24-2013, 08:00 PM   #22
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i was running 560rwhp, with a kb, so you know my iats are high..i never ran under 124mph with the kb @ 560rwhp{approx a dozen runs} ...actually ran with 660rwhp and could not do any better then the time i posted with the 560rwhp, traction was a issue...more power makes it harder to get traction and not break loose shifting..at least that was what i found on dr,s..tried some 18in dr,s and ran twice on a set of bogarts with 17in drs, with same results..spinning tires..never did get to try some slicks, i,m sure that would of made a big difference with the higher hp..ran in florida , approx 75f when i made the best pass
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