Racepak short record

Bill Grubbs · 08-08-2017, 09:19 AM

When do you shut off your ignition switch? are you running an alternator? How is the unit set to stop recording? RP will truncate the file backwards several seconds if the power is lost to the "black box".

On our SS car with the Smartwire system. I have the RP wire latched on for 10 seconds past ignition and/or record cutoff. This way if the driver cuts power because of a problem the full event is recorded as opposed to losing the last 5-10 seconds of the run where the event happened.

Without using the Smartwire, the RP draws so little power if there is no O2 sensors. One could wire it directly to the Master Cutoff switch. Then the record button could be tied to the ignition switch. This way the RP always has power(so long as the MC switch is on), and will record only when the ignition is on and the record button is pushed. Best of both worlds!

Also the recording may shut off at the same event...not time. For instance, (example only) the RP may stop recording when oil pressure is less than 30 psi. In this instance the RP will record an entire run and all the way back to the pits during qualifying. However during eliminations if you dump your opponent really hard at the line, the oil pressure may drop to 25 psi and the RP will stop recording in this case. As you see in this example the RP stops recording at the same place (loss of oil pressure), but not at the same time or spot on the track.

Bill

08-08-2017, 09:19 AM	#19
Bill Grubbs Member Join Date: Oct 2002 Location: Magnolia, Texas Posts: 403 Likes: 1 Liked 454 Times in 60 Posts	Re: Racepak short record When do you shut off your ignition switch? are you running an alternator? How is the unit set to stop recording? RP will truncate the file backwards several seconds if the power is lost to the "black box". On our SS car with the Smartwire system. I have the RP wire latched on for 10 seconds past ignition and/or record cutoff. This way if the driver cuts power because of a problem the full event is recorded as opposed to losing the last 5-10 seconds of the run where the event happened. Without using the Smartwire, the RP draws so little power if there is no O2 sensors. One could wire it directly to the Master Cutoff switch. Then the record button could be tied to the ignition switch. This way the RP always has power(so long as the MC switch is on), and will record only when the ignition is on and the record button is pushed. Best of both worlds! Also the recording may shut off at the same event...not time. For instance, (example only) the RP may stop recording when oil pressure is less than 30 psi. In this instance the RP will record an entire run and all the way back to the pits during qualifying. However during eliminations if you dump your opponent really hard at the line, the oil pressure may drop to 25 psi and the RP will stop recording in this case. As you see in this example the RP stops recording at the same place (loss of oil pressure), but not at the same time or spot on the track. Bill Last edited by Bill Grubbs; 08-08-2017 at 09:27 AM.