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Where's the mph???

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Old Jul 18, 2005 | 09:27 PM
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Default Where's the mph???

Well I went to the track a few weeks ago to finally make a nitrous pass. All of this on an 1/8 mile track. It went a 7.60@91mph with a 1.75 60 on a 100 shot. This is with the Harlan window switch set from 2800-6000. I was kinda dissapointed in the mph and the et. I probably had around 950-1000 bottle psi. I know this is a touchy subject...but my plans for this weekend ae to up the jets to the 150's, make sure the bottle pressure gets to at least 1050, and spray through the shifts. As for the spraying through the shifts, I just plan on doing it once to see if that is where the mph and et are hiding. I am assuming the easiest way to get it to spray through the shifts would be to set the cutoff rpm on my window switch higher than the shift point, correct? I know the car has alot more in it than that. Now all of this was also in very hot and humid weather which would make a little difference. The car was only running 7.98-8.03na when it usually goes an easy 7.8x-7.92na. Anyway, let me know what you guys think about my plans..
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Old Jul 24, 2005 | 12:36 PM
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So what do you guys think..
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Old Jul 24, 2005 | 02:51 PM
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Originally Posted by TN94Z
So what do you guys think..


I think your trap looks a little low. Couldnt tell you why though, my car traps more on just motor.
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Old Jul 24, 2005 | 02:56 PM
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I know..that is what i can't understand. NA the car only traps @87. Can't figure it out
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Old Jul 25, 2005 | 09:48 AM
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on the 150s i would expect mph to be atleast 96 mph through an auto and 100s should be 92-93 i would think anyways. spray her through the shifts on the 100 and 150 shot and hopefully all goes well.
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Old Jul 25, 2005 | 10:12 AM
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IMO, 4mph in the 1/8th is good, or avergage, for a 100shot on a A4 car...with a window switch. It is not necessary to put a window switch on an A4. Take it off, get a button, push and hold from green to finish. With a 150 shot, you may see 1 full second and up to a 10mph gain in the 1/4.
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Old Jul 25, 2005 | 07:40 PM
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IMO, 4mph in the 1/8th is good, or avergage, for a 100shot on a A4 car...with a window switch. It is not necessary to put a window switch on an A4. Take it off, get a button, push and hold from green to finish. With a 150 shot, you may see 1 full second and up to a 10mph gain in the 1/4.
I have thought about taking the window off and getting the button. I may end up doing that. That might help out bracket racing too..if I spin a little out the hole, I could hit it once it got hooked up to get back on track. Hmmm
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