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Engine Specific Info and Questions => IDI Engine => Topic started by: vwsb1974 on August 02, 2012, 10:02:19 am

Title: setting idle
Post by: vwsb1974 on August 02, 2012, 10:02:19 am

I have serched for this and did not find what i was looking for. My question is how do i check the engine speed. I know how to change it I just want to know how to check it? There is no signal for a timing light so how do you check it? I know you would check it on the timing spot on the trans. I am adding a TAC and want to make it as accurate as i can.

Title: Re: setting idle
Post by: libbydiesel on August 02, 2012, 02:31:02 pm

I use a diesel pulse adapter and timing light with rpm function.

Title: Re: setting idle
Post by: VW_Commuter on August 02, 2012, 08:57:59 pm

Look around for a phototach.  All you do then is to put some reflective tape on the pulley of your IP and use the phototach to get the RPM of the pump.  RPM of engine = RPM of pump x2.  Or, you can put 2 pieces of the reflective tape on the pulley, 180 degrees apart and then the RPM read on the phototach will be the RPM of the engine.

Title: Re: setting idle
Post by: CarlosA on August 03, 2012, 02:06:40 am

Quote from: VW_Commuter on August 02, 2012, 08:57:59 pm

Look around for a phototach.  All you do then is to put some reflective tape on the pulley of your IP and use the phototach to get the RPM of the pump.  RPM of engine = RPM of pump x2.  Or, you can put 2 pieces of the reflective tape on the pulley, 180 degrees apart and then the RPM read on the phototach will be the RPM of the engine.

I use this one .. cheapo from china via ebay. I just stuck a piece of the tape on the flywheel and pointed it in there, worked perfectly.

Title: Re: setting idle
Post by: vwsb1974 on August 03, 2012, 06:21:26 am

thanks for the info i will look into it ;D