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Took the Charger out today, and having problems getting ET out of the car, also bad 60' times.
The Basics: 1971 Charger street car, Scaled today at 4,090 pounds race weight (car and driver.)
Racing a Bandimere (Morrison Colorado) my altemeter was showing 6,800 ft altitude.
My best run was the first run, they got worse after this one:
60' = 1.868
330 = 5.033
1/8 = 7.664 @ 93.51 MPH
1000 = 9.943
1/4 = 11.866 @ 117.83 MPH.
This run I was short shifting at 6,200 RPM?

My 60' times were usually 1.90's and about 12 flat ET's?

My tires are MT Street Radials, but they are about 7-8 years old and almost worn out. They din't seem to be as sticky as when they were new?
Also, I'm not sure how to launch the car with the new 5,000 stall converter. This new converter seems to leave softer than my old 3,500 stall converter? Or maybe my transition to WOT is going lean? Maybe I need more accelerator pump shot?

Anyhow, looks like I have some tuning to do to get this thing running right.

Any ideas where to start?



1st. thing i'll say, at that Alt. & weight your doing fine with an 11.8, If you ran at a track with DA around 2000-2200ft. & knocked off a good 800 lbs. that combo would be 1 second faster or better, thats a solid 10.8 right there, You need to match the converter to the engines torgue curve, meaning if your max torgue comes in at 4300, you should select a "flash" stall about 3-400 above that if memory serves me, so your looking at around a 4600 stall, you may have over done it, The quality of the converter is also very important, that'll make or break the ET & MPH.

I myself think your doing quit well with what your up against (weight & high Alt.)

75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU