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Reading wrong RPM with VR
Posted: Thu Nov 03, 2016 6:03 pm
by roboluke
Hi,
So I have a BMW M30 with single coil ignition and a VR sensor reading a 60-2 trigger wheel. But when I crank the motor (fuel pump turned off) the RPM reads at about 3800-4000 RPM. I believe I have the correct settings as I compared to other people's settings with the same setup. Any idea on what this could be?
Thank you!
Re: Reading wrong RPM with VR
Posted: Fri Nov 04, 2016 8:14 am
by trakkies
It this cranking RPM as read in Tuner Studio? If so, post your MSQ file here.
Re: Reading wrong RPM with VR
Posted: Fri Nov 04, 2016 6:38 pm
by roboluke
Is it something with 'skip teeth' for tach? How do I calculate what that value should be for a 60-2 wheel? Is it 60 because 60 is one full revolution?
Re: Reading wrong RPM with VR
Posted: Wed Jun 28, 2017 3:45 am
by ms2tuning
As previously asked .... is this the rpm you are seeing in tuner studio ... or is it on the rev counter in the car?
The 60 -2 wheel is just set up as a trigger wheel ... then set 60 teeth and 2 missing teeth. If tuner studio is reading 4000 ... there is something wrong with either the trigger wheel settings ... or the board has not been set up for a VR input and is getting confused. or if the rpm is jumping around all over the place ... then it is likely that the sensor is not correctly aligned with the trigger wheel.
Re: Reading wrong RPM with VR
Posted: Fri Aug 11, 2017 5:22 am
by Matt Cramer
Can you post your MSQ?