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

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Old 06-10-2013, 09:43 PM   #201
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I ran the numbers again. June 8th 2013 2:23 pm @ KIR.

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Old 06-10-2013, 10:06 PM   #202
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I ran the numbers again. June 8th 2013 2:23 pm @ KIR.

Ok. If that's how it's done, I guess that's it then. When I enter the numbers it calculates the DA 3564'. It includes the current elevation. I must be missing something. My weather station showed 3500' +/- at the track that day also. Oh well. :-) I guess I'm not sure where your getting your DA numbers. Its Supposed to be 3564' in the first box?
You sure you're selecting ks - wichita international raceway? Its called Kansas international dragway now but it's not listed that way in the calculator. Just trying to help! Or confuse lol.

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Old 06-11-2013, 09:55 AM   #203
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Ok. If that's how it's done, I guess that's it then. When I enter the numbers it calculates the DA 3564'. It includes the current elevation. I must be missing something. My weather station showed 3500' +/- at the track that day also. Oh well. :-) I guess I'm not sure where your getting your DA numbers. Its Supposed to be 3564' in the first box?
You sure you're selecting ks - wichita international raceway? Its called Kansas international dragway now but it's not listed that way in the calculator. Just trying to help! Or confuse lol.

I'll look into it. What I think is going on is I use the Drag time calculator that is linked to the thread and it may be an older version.
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Old 06-11-2013, 10:59 AM   #204
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Here's the numbers I ran.

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Old 06-11-2013, 11:26 AM   #205
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Here's the numbers I ran.

Ok, I see, you ran the numbers for Kansas City! The run was made in Wichita ks at KID (listed as WIR in directory) track elevation is 1305'.
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Old 06-11-2013, 07:37 PM   #206
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Ok, I see, you ran the numbers for Kansas City! The run was made in Wichita ks at KID (listed as WIR in directory) track elevation is 1305'.
Got it I'lll get it fixed.

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Old 06-11-2013, 08:01 PM   #207
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Got it I'lll get it fixed.

Thanks merc! Sorry to be a pita, lol. Thanks for your efforts to maintain these lists. :beer:
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Old 06-11-2013, 08:45 PM   #208
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Thanks merc! Sorry to be a pita, lol. Thanks for your efforts to maintain these lists. :beer:
No problem, sometimes you can't see the forrest for the trees.

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Old 06-13-2013, 07:50 PM   #209
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1Le with CAI, hi flow cats and DRs
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Old 06-13-2013, 08:14 PM   #210
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Cool. I'll get the corrected 1LE list going soon.

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Old 06-13-2013, 08:42 PM   #211
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1Le with CAI, hi flow cats and DRs
get that 60ft time down and that thing will be flying down the track
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Old 08-13-2013, 08:45 AM   #212
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Here's my time slip. It was at Memphis Motorsports (Memphis International) on 8/8/2013 at 10:05 P.M. I'm applying for: Bolt On's with Internal Engine Mods Stock Displacement (Corrected).

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Stock Tires, UDP, Cam, Intake, PTB, Headers, Electric Exhaust Cutouts

My car is the LS3 - Manual

Corrected Time with DA from Drag Times:

Density Altitude: 2545 feet above sea level
Relative Density: 92.76 %

1/4 mile ET: 12.217 seconds

1/4 mile trap speed: 115.71 MPH

Stock and Mildly Modified Naturally Aspirated Engines 11.849 @ 119.381 MPH

Extensively Modified Naturally Aspirated Engines 11.97 @ 118.209 MPH

Extensively Modified Supercharged and Turbocharged Engines 12.078 @ 117.037 MPH
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Old 08-13-2013, 09:11 AM   #213
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Stock and Mildly Modified Naturally Aspirated Engines 11.849 @ 119.381 MPH

Extensively Modified Naturally Aspirated Engines 11.97 @ 118.209 MPH

Extensively Modified Supercharged and Turbocharged engines 12.078 @ 117.037 MPH
I don't get why supercharged listed with turbocharged. Turbocgarged makes same psi no matter atsmosphere lose from high DA. Supercharger only spins speed based on engine so loses psi with DA change. Shouldn't it be with Extensively Modified Naturally Aspirated?
Always wondered
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Old 08-13-2013, 09:14 AM   #214
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I don't get why supercharged listed with turbocharged. Turbocgarged makes same psi no matter atsmosphere lose from high DA. Supercharger only spins speed based on engine so loses psi with DA change. Shouldn't it be with Extensively Modified Naturally Aspirated?
Always wondered
Not that I know a whole lot about turbos and superchargers, but I'm pretty sure you're correct in that. Turbos aren't affected, whereas superchargers are.

I have no idea why drag times separates it out like that...maybe they didn't want another category but they didn't want to group the turbo into the Extensively Modified Naturally Aspirated category...who knows.
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Old 08-21-2013, 01:29 PM   #215
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ALL internal combustion motors are affected by altitude/temp/DA. A big nitrous car would be the least affected since its providing its own pressure, oxygen and cooling though the base power made by the na motor would be less.

In regards to sc vs tc, they both suck air and they're both compressors so both are affected by crappy DA. The only difference is one causes parasitic loss to spin the turbine and one doesnt.

One benefit of forced induction over na in that situation is you MAY be able to raise the boost to compensate just like a nitrous car could run bigger jets. That said, if you're already running your fi car as hard as you can then you wont be able to simply turn up the boost just because you're at higher altitude or in crappy DA conditions.

Trust me when I say that turbo cars LOVE cold air and high air pressure... A forced induction car PLUS a shot of nitrous is an awesome combo!

"Life is a one lap race, carpe diem!"
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Old 08-21-2013, 02:29 PM   #216
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ALL internal combustion motors are affected by altitude/temp/DA. A big nitrous car would be the least affected since its providing its own pressure, oxygen and cooling though the base power made by the na motor would be less.

In regards to sc vs tc, they both suck air and they're both compressors so both are affected by crappy DA. The only difference is one causes parasitic loss to spin the turbine and one doesnt.

One benefit of forced induction over na in that situation is you MAY be able to raise the boost to compensate just like a nitrous car could run bigger jets. That said, if you're already running your fi car as hard as you can then you wont be able to simply turn up the boost just because you're at higher altitude or in crappy DA conditions.

Trust me when I say that turbo cars LOVE cold air and high air pressure... A forced induction car PLUS a shot of nitrous is an awesome combo!

"Life is a one lap race, carpe diem!"
I was sayi g cuz turbo will spin any speed neccessary to reach the springs 15psi.
Supercharger spins a set speed so if at half atmosphere it make half the boost ..
temp does kill turbos
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Old 08-21-2013, 03:42 PM   #217
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Motor blew at 1000' so faster slip to come soon
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Old 08-21-2013, 04:18 PM   #218
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I was sayi g cuz turbo will spin any speed neccessary to reach the springs 15psi.
Supercharger spins a set speed so if at half atmosphere it make half the boost ..
temp does kill turbos
Greg, stop crying like a biotch and trying to implement your own rules. It is what it is at this point. Just get a faster car!!
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Old 08-22-2013, 11:53 PM   #219
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Motor blew at 1000' so faster slip to come soon
Can't post this time slip without seeing track, date and time. Sorry that's rules. No way to enter run into DA calculator without that information.
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Old 08-23-2013, 03:48 PM   #220
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Can't post this time slip without seeing track, date and time. Sorry that's rules. No way to enter run into DA calculator without that information.
Hey Merc, did mine have everything you needed?
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Old 08-23-2013, 04:34 PM   #221
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Hey Merc, did mine have everything you needed?
Sure did..
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Old 08-23-2013, 05:13 PM   #222
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Hey Merc, did mine have everything you needed?
Did I miss ur slip?
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Old 08-23-2013, 05:24 PM   #223
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Greg, stop crying like a biotch and trying to implement your own rules. It is what it is at this point. Just get a faster car!!
Im get turbos lol
no point faster right now not putting roll cage in
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Old 08-23-2013, 05:50 PM   #224
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Im get turbos lol
no point faster right now not putting roll cage in
You should get hooked on phonics because your English sucks!
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Old 08-23-2013, 05:53 PM   #225
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You should get hooked on phonics because your English sucks!
Im on the cell phone .. didnt know i was being graded
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