The Project Pad

Alright so I purchased a flywheel/clutch combo but the flywheel had no timing pin installed. This was not a huge deal as i got the schematics for the flywheel and my machinist pinned it. Upon installation i noticed that the timing pin is not at the g4 sensor when the engine is at tdc. I checked the schematics again and again and it appears as though he did it right. Since the flywheel can only go on one way I am puzzled as to why this is happening. I also counted back teeth from the diagnostic ports and there are the same number of teeth between the new flywheel and a factory one. Unless I am just crazy and the timing pin isn't supposed to hit the g4 @tdc then i think the master hole is in the wrong spot. Any info or input appreciated.

Here is a picture of the flywheel. The black mark is where the g4 sensor would be at tdc. The pin is counter clockwise from the mark and sits near where the pan and block meet at tdc.

I thought the pin was supposed to be 15 or 30 degrees away from TDC, or something like that.

I'm fairly sure that there are also two different pin locations, "early ur-q" and "everything else".

Yeah i may have jumped the gun on this one. My flywheel seems to be off about 6° from factory aan flywheel still. As long as i can dial in the the trigger point on vems i should be fine.

The pin is before TDC. My TDC is 58.5º after the trigger.

here is what matters as far as vems is concerned:

Make sure that your timing pin is centered on the hall sensor window on the cam. the hardware in the ecu uses the cam sensor to filter noise by only "looking" for the reference pin while the cam sensor is triggered. put your pin outside that window and it will not run.

[quote]here is what matters as far as vems is concerned:

Make sure that your timing pin is centered on the hall sensor window on the cam. the hardware in the ecu uses the cam sensor to filter noise by only "looking" for the reference pin while the cam sensor is triggered. put your pin outside that window and it will not run./quote]

So are you saying that the flywheel tdc pin is of less importance than the cam hall sender? I am using a factory AAN sensor with a tommisbillet cam gear so nothing should change from factory. For some reason my flywheel timing pin seems to be a few degrees off from a 7a or AAN flywheel but that is where eurospec said to put it. As long as I can dial in the tdc trigger I should be alright I would think(hope).