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Certified Pre-Owned
Join Date: Aug 2002
Location: Nanny State
Posts: 3,132
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Where is the easiest place to pull power for an hour meter (engine running only)?
I have a small digital hour meter with memory that I'd like to log run time on for my engine. Where is the easiest place to pull power for it when the engine is running? It would be nice if it was engine only and not just ignition "on".
The meter just needs +12v constant supply to it when engine running. Thanks
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'84 Carrera Coupe |
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06-06-2012, 07:12 PM
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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,855
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How much time do you really plan on having the ignition turned on without the car running?
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No left turn un stoned |
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06-06-2012, 07:17 PM
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,885
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On my race car, I have an hour meter wired up so that it only runs when the engine is at 3000 RPM or above. As far as I am concerned, idling doesn't really count.
If you agree, this post might be of interest: Hour meter Scott |
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06-06-2012, 07:30 PM
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Certified Pre-Owned
Join Date: Aug 2002
Location: Nanny State
Posts: 3,132
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Quote:
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'84 Carrera Coupe |
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06-06-2012, 07:37 PM
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Registered
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Fuel pump voltage supply?
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06-06-2012, 07:48 PM
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Registered
Join Date: May 2004
Location: Encinitas (San Diego CA)
Posts: 4,495
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Put it on the fuel pump. That only is engaged through stage 2 of the DME relay when the engine is running. crank sensor tells the DME that the engine is cranking before the fuel pump is activated.
Doug
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1971 RSR - interpretation |
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06-06-2012, 08:09 PM
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Registered
Join Date: Apr 2004
Location: Santa Cruz Ca
Posts: 782
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Activate a relay with the signal from the oil pressure light switch. Use the relay output to run the meter.
regards, Phil |
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06-07-2012, 08:38 AM
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