[Shotimes] Help with engine stumble in 95 MTX

[Zach Leahy]

Yes George, that's what I did, in a couple positions.  What the
previous post was saying is that you are retarding or advancing the
entire valvetrain, intake and exhause when you move one tooth on the
belt.

To actually be able to change just the intake, you need to move the
intake one way nad then correspondingly move the exhaust (chains) the
other way.  That would allow you to adavance the inake perhaps and
retard the exhaust, decreasing overlap, or opposite to add overlap, or
advande everything forward, or back.  Becasue the intake and exhaust
cam are chaned together in order to change just the intake, one needs
to adjust 4 sprockets.

Z

On 8/10/05, George Fourchy <krazgeo@comcast.net> wrote:
> On Wed, 10 Aug 2005 08:58:39 -0700 (PDT), Ian Fisher wrote:
> 
> >On the SHO, the intake cams can only be adjusted
> >independently using adjustable sprockets such as
> >Josh's timing chain sprockets.
> 
> Theoretically, if someone wanted to spend a bunch of money to buy those sprockets, I
> suppose one could.
> 
> But if you divide the number of teeth in the factory sprockets by 360, you'll get
> the number of degrees either side of TDC one tooth will give.  I don't have any
> right here...they are in storage, but if there were 90 teeth, each one would be 4
> degrees.  If there were 60 (probably closer to correct), then each would be 6
> degrees.  If the crank sprocket has 30, then each one would be 12, probably a bit
> much for a slight valve timing exercise.
> 
> ...that sounds about right....30 teeth on the small sprocket, and twice as much for
> half the speed...60 on the bigger sprocket.....
> 
> Count the teeth, then adjust the cam sprockets by as many degrees as you want to
> try.
> 
> George
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