Effect of air?
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From: Lafayette/West Lafayette, IN
Effect of air? I've been trying to break 12's now for a little over a year now. Each time I go to the track I think I am going to break into them, but I don't. i just hover right on the edge. Each time i've gone the air has been worse too. This is copied from another thread of mine, but I'm wondering, how much of an impact dose the air have? I might be going back this friday, and if the weather is right, the DA should hopefully be under 1000...
Here are the best times from the track each trip I've made so far, what I did in between them, and what the air was like each time.
Trip 1: 13.15@105.# (I believe) - Exhaust only - 124 DA
Trip 2: 13.04@106.9 - Added intake manifold/ported TB - 1827 DA
Trip 3: 13.12@107.6 - Switched Y-pipe/catback for duals - 2188 DA
Trip 4: 13.04@106.8 - Tuned - 2593 DA
So either all of my mods since the initial exhaust have done nothing, or the air has a decent effect on it, and if I go back on a nice day all of those new things I've done will add up for a better time all at once. If looking at that shows me anything, getting the LS6 intake manifold and the ported throttle body in there may have given me the biggest gains in actual power so far. The air got worse by far the most, and I still managed to drop .1 off my time and add over 1 mph. If I go back with this converter sitting in my garage and no tires it will probably screw up my time completely and I'll get like a 13.4@105 or something. lol
How much of an effect does the air really have on the car? If I go this friday and it really is below 1000 DA can I expect to be in the 12's finally?
Here are the best times from the track each trip I've made so far, what I did in between them, and what the air was like each time.
Trip 1: 13.15@105.# (I believe) - Exhaust only - 124 DA
Trip 2: 13.04@106.9 - Added intake manifold/ported TB - 1827 DA
Trip 3: 13.12@107.6 - Switched Y-pipe/catback for duals - 2188 DA
Trip 4: 13.04@106.8 - Tuned - 2593 DA
So either all of my mods since the initial exhaust have done nothing, or the air has a decent effect on it, and if I go back on a nice day all of those new things I've done will add up for a better time all at once. If looking at that shows me anything, getting the LS6 intake manifold and the ported throttle body in there may have given me the biggest gains in actual power so far. The air got worse by far the most, and I still managed to drop .1 off my time and add over 1 mph. If I go back with this converter sitting in my garage and no tires it will probably screw up my time completely and I'll get like a 13.4@105 or something. lol
How much of an effect does the air really have on the car? If I go this friday and it really is below 1000 DA can I expect to be in the 12's finally?
There is a calculator in the sticky: https://ls1tech.com/forums/drag-racing-tech/729528-calculator-air-density-tires-gears.html
http://www.hardtail.com/techtips/altitude.html
http://wahiduddin.net/calc/calc_da.htm
Yes you should break into the 12's if the da is lower as long as your still getting traction.
If you get traction then it should be a 12.8X if the da is 1000 vs the last run you made when it was 2593. This is all other things being equal.
http://www.hardtail.com/techtips/altitude.html
http://wahiduddin.net/calc/calc_da.htm
Yes you should break into the 12's if the da is lower as long as your still getting traction.
If you get traction then it should be a 12.8X if the da is 1000 vs the last run you made when it was 2593. This is all other things being equal.
Thread Starter
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From: Lafayette/West Lafayette, IN
Ok, well I'm looking forward to this friday then. A cold front came through and wunderground says it will be 54 degrees that night by 7, so if it doesn't rain I should be good to go 
. I just looked at their records on that site again too, and redid my averages for temp. and stuff, and it was actually a couple degrees hotter than I thought I remembered, so I redid the DA and it was actually 2636.
. I just looked at their records on that site again too, and redid my averages for temp. and stuff, and it was actually a couple degrees hotter than I thought I remembered, so I redid the DA and it was actually 2636. 
It looks like its going to rain where you are at on friday.
The best days are probley when the H is sitting right on top of the track on this map.
http://weather.unisys.com/images/sat_sfc_map.gif
The best days are probley when the H is sitting right on top of the track on this map.
http://weather.unisys.com/images/sat_sfc_map.gif
Thread Starter
12 Second Club
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From: Lafayette/West Lafayette, IN
I'll be heading to US41 if it isn't raining on friday. Hopefully it won't rain. If it does then I'm just going to put my converter in and not worry about it. I would like to prove to myself that the car can run 12's though before it goes in.
