how to verify timing via timing light? HELP
how to verify timing via timing light? HELP 
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On The Tree
Joined: Sep 2008
Posts: 132
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On The Tree
Joined: Jun 2015
Posts: 182
Likes: 3
From: Portland OR
It's not hard to make or buy a piston stop, make a pointer and check timing.
I have done this many times to check for a slipped balancer.
And any motor I build I install some type of marker just for reference.
As far as putting the ECU into a fixed timing mode Im not sure.
This is easy to do with a MegaSquirt, with HPTuner you may need to create a flat timing table (at 10°) and disable any timing related idle control.
In the end you have no way of adjusting the timing other than the commanded value.
I have done this many times to check for a slipped balancer.
And any motor I build I install some type of marker just for reference.
As far as putting the ECU into a fixed timing mode Im not sure.
This is easy to do with a MegaSquirt, with HPTuner you may need to create a flat timing table (at 10°) and disable any timing related idle control.
In the end you have no way of adjusting the timing other than the commanded value.
You can easily command a fixed timing with a OEM PCM using the scanner controls. Select the timing amount and click enable. The PCM will command the timing you selected regardless of RPM or load. It will return to normal mode when you disable it, close the scanner or turn the ign switch off.
To have a mark and pointer for the timing you need to find the TDC with a mechanical stop, mark it to the damper and install a pointer. That mark would be 0
However the engine will struggle to run at 0 deg of advance, it can be done but I think it would be better to have a damper with degree marks, command like 20 deg in the scanner and check with the light, the engine will run smoother and the reading will be more accurate.
To have a mark and pointer for the timing you need to find the TDC with a mechanical stop, mark it to the damper and install a pointer. That mark would be 0
However the engine will struggle to run at 0 deg of advance, it can be done but I think it would be better to have a damper with degree marks, command like 20 deg in the scanner and check with the light, the engine will run smoother and the reading will be more accurate.
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Joined: Nov 2003
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From: Norn Iron
