I am going to the track tomarrow night, and am wondering what tire pressure to run. I will be on a set of nitto terra graplers, and they are 2857516. I will probably be leaving the line at around 1800 rpm, and the nitrous doesn't hit untill 3000. Mods are in my sig. thanks.

Chris

 

Im no expert this but I would say around 26lbs.

 

If it still does not hook don't be afraid to drop them to 20 psi.

Seth

 

finally got to the track last night. I will post some vids later, but not to bad overall.

1st pass all motor, shut down early (had trouble seeing the finish line due to poor lighting.
RT .5031
60 2.6762
1/8 10.7266 @ 68.49
1/4 16.6007 @ 73.18

2nd pass all motor, dropped tire pressure to 26 psi.
RT .4542
60 2.4183
1/8 10.3307 @ 69.15
1/4 15.9558 @ 84.76

3rd pass dropped tire pressure to 22 psi and sprayed. The spray hit right after the 60 ft, and broke the rear loose! even with a set of 285/75/16 nitto terra graplers!
RT .1120
60 2.6325
1/8 9.8731 @ 77.84
1/4 14.9409 @ 95.10

4th run also on the spray
RT .5112
60 2.4598
1/8 9.7907 @ 75.94
1/4 14.9856 @ 92.88

5th pass this was the last pass I made on the spray. I noticed the spray was not hitting like it should, as soon as I got done with the run I pulled over and found that I have a pinhole leak in my n2o line that goes from the solonoid to the nozzle. There is nothing there that it was rubbing on so I have no clue how it happened.
RT .2465
60 2.4970
1/8 9.9477 @ 74.42
1/4 15.2827 @ 89.66

I made a few more passes on motor after that, and because it was cooling off, the best one that I managed was a 16.0001 @ 85.11. Overall not a bad night, this is the first time I have had the truck out , and also the first time that I have raced an automatic trans vehicle.

 

Nice times!!!

 

thanks, the vids are on streetfire.net, but are takeing forever to optimize.