race pack problems

Yesterday we went out for the first time this year. After re wiring my car, installing a leahy timer and 6 shooter with the fuel log as the only new components from last year. 1st run shook violently. I went to look at the racepak data and it was very off. It only read as if it was idling. never received the wheel speed graph. just read the engine was idling across the whole graph right at 2200 it said. ok. so maybe I was thinking it had a glitch. second run made a decent run. my chief hit the button properly. same thing. just reads as if it was idling. im going to recheck the ground wires. and try and test it out. But has this happened to anyone else or seen anything like this?

 

How are you picking up timing ? Timing reader? Thru the pickup off the shooter. I've seen this happen. Your setting is wrong. We need more info.

 

I'm picking the engine rpm off of the tach output. It is a top sportsman car v300sd. I just set it up for him to start the timer. Maybe I will look into a way it will start recording when I hit the trans brake button. I believe it can read for a couple of minutes.
The reading I got yesterdaywas for I think 8 seconds. All reading as if was at idle. Egts all read like it was idle. I had fuel pressure and oil pressure. Never got a driveshaft speed. No acceleration force.

 

I can do that tomorrow evening mike. I will not be home until then. Thank you.

 

I figured out my problem. The run was recorded. I just did not move over far enough to see the run. my crew chief hit the button long before I pulled into the beams. so my next question. I think it would be a good idea for me to use the transbrake button to start the timer. but does anyone know if the racepak starts when the button is pressed or does it begin when it is released? my idea is to wire it in a relay so that when I press the trans brake button, the relay closes. due to my delay box, the button will be pressed and keep that relay closed until the transbrake is released.

 

Or you can have your guy just press the button as you light the top bulb. Just as easy without weight of wiring or relay failure

 

Personally, I would leave it as it is. I like the idea of having the burnout in the data. You never know what you might find, a problem could have raised it's ugly head during the burnout.

 

I really like this ^^^^^ as well. Thanks for the info.

 

Mike, so it will start automatically recording based on engine rpm and there is no button to use at all? Only changes will be on the laptop and no longer i have to worry about my crew not hitting the button? If this is right i like the sound of that