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-   -   Racepak question (https://classracer.com/classforum/showthread.php?t=50649)

astikhossw 11-28-2013 10:45 PM
Racepak question
 
Hey guys this is my first time running a stocker and a car with a racepak and i need to know if on a racepak graph after a run if the driveshaft graph shows a spike during/after the shift if that indicates tire spin and if you see spikes down track on the RPM graph after the 2,3 shift if that indicates a high speed miss.Thanks just doing a little after the race troubleshooting.

Chad Rhodes 11-28-2013 11:16 PM
Re: Racepak question
 
Quote:
Originally Posted by astikhossw (Post 410594)
Hey guys this is my first time running a stocker and a car with a racepak and i need to know if on a racepak graph after a run if the driveshaft graph shows a spike during/after the shift if that indicates tire spin and if you see spikes down track on the RPM graph after the 2,3 shift if that indicates a high speed miss.Thanks just doing a little after the race troubleshooting.
Drive shaft spikes, or a jump followed by a plateau would be tire spin. Spikes or zig zags in the rpm can be several things; valve bounce, intake reversion, ignition issues, detonation, or a hole in the fuel cure to list a few.

Bill Grubbs 11-29-2013 09:54 AM
Re: Racepak question
 
More than likely what you are seeing is the tire unwrapping/ wrapping up around the wheel (drive shaft).

voltdr 11-29-2013 12:02 PM
Re: Racepak question
 
Which Racepak system are you using? If it has the accelerometer, you can use it to look at spin/hook issues also.


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