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Old 05-19-2014, 10:04 AM   #1
GMR-PERFORMANCE
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Join Date: Aug 2010
Location: Keller TX
Posts: 836
Race track results

Well we made the first night without breaking anything and sorting out some issues.
Still running the 3.73 gear swapped the tire to the mickey 295/45/17 tire. New 4L80E trans. Set up the 7730 box to make recording on the WOT switch. After playing with that and sorting a rpm issue out it started to work well. With 3450 launch ( low stall is 4100) on the box, 6400 RPM up shift ( 7100 is peak) letting the trans shift. ( so leaving on the brake in low and bang shifter twice right out the gate) it made a 1.63 60 footer with a 7.33 1/8 mile pass. Now for the bad the convertor is too tight and trans brake is slow as 3 legged dog at the race track.. Will be swapping trans brake for a 3rd gear launch version and the convertor will be pulled and set up looser. The best pass was great to see the changes from the first pass of 8.43 @ 1.8 60 foot. On last pass the data log showed a 700 RPM flare when it spun the tires. just after 1-2 upshift.. SO will pull some timing on the shift point to see if that will help. Hope to have this up and going be end of week and then we can turn the two gun system on and see how well it goes from there.

Truck is still a full on street truck with full 8 foot wood bed . I hope to get it weighed soon. Any guess's on the weight??
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