[Healeys] Strange Timing Setting

[warthodson at aol.com]

The question I have for Patrick is: Considering that the crank shaft goes around twice for every single rotation of the cam, how do you know whether the #1 piston is at TDC at the end of the compression/beginning of the power stroke or at the end of the exhaust/beginning of the intake stroke? I.E. The #1 piston is at TDC twice in a 4 cycle engine. What method are you using to determine which cycle you are on? The fact that the pointer is pointing at the mark/slot on the harmonic damper is not enough. 

To be at TDC on the compression/power stroke the inlet & exhaust valves should not be open. If the rockers are loose (I.E. the valves are closed) your are on the correct stroke. If the rockers are not loose you are either not on the correct stroke or your cam timing is not correct. 

Gary Hodson
 
 
-----Original Message-----
From: Per Schoerner per at schoerner.se

All
Slight misunderstanding here I think. I read Patricks text as ” piston 1 at TDC while you can rock the lifters by hand”. If the lifters are moved by the cam Gary is right.
Sorry for the confusion.


Per


Skickat från min iPhone

11 feb. 2018 kl. 20:19 skrev Per Schoerner <per at schoerner.se>:



Gary
That is the end of/beginning of the compression/power strokes to me.


Per


Skickat från min iPhone

11 feb. 2018 kl. 15:55 skrev warthodson at aol.com:





Your description stated "Number 1 piston is top dead centre and the rocker gear is rocking." Is that not a description indicating that the #1 piston is on the exhaust stroke? 
Gary Hodson
 




 







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