Timing gear and intermediate shaft the same?

[rfkellner at snet.net (Rick Kellner)]

Dan, thanks for the reply.  If it was the same the $39 was almost worth
it to me for the looks.
I do have a line on a slightly used Eruospec 16V adjustable cam gear,
see link below, for a very reasonable price.  I thought the two may make
a nice combination.
Rick.

http://www.bildon.com/catalog/DetailsList.cfm?ID=ZVW%20109%20500-80&Nav=
6




-----Original Message-----
From: Dan Bubb [mailto:jdbubb@verizon.net] 
Sent: Friday, December 22, 2006 7:53 AM
To: Rick Kellner; 'scirocco scirocco'
Subject: Re: Timing gear and intermediate shaft the same?

The intermediate shaft sprocket and cam sprocket on the 8V are the same.
They need to turn at the same speed since the distributor needs to stay
in sync with the cams.
They are different sizes on the 16V. The intermediate shaft only drives
the oil pump and I suppose VW sped it up a little bit by using a smaller
sprocket to get a little bit more volume for the piston oil squirters.
Personally, I think a light weight cam or intermediate shaft sprocket is
a waste of time. They turn 1/2 the speed of the crank and their diameter
is small compared to the flywheel or even the crank itself. Remember
that rotational inertia is the weight X the distance from the axis of
rotation squared (or maybe it's ^3. I don't really remember and I'm too
lazy to look it up) Their contribution to rotational inertia is probably
on the order of a couple % of that of the crank, flywheel and clutch
components. You'll never notice it, although they do look nice!
I've never played with cam timing on a 16V. In general though the effect
is pretty subtle and anything over about 4 degrees is IMO overall
detrimental to the power curve. The benefit of adjustable timing
sprockets is that you can actually adjust the cam to factory timing
specs despite several variables that may cause it to vary.
Dan

From: "Rick Kellner" <rfkellner@snet.net>
Sent: Thursday, December 21, 2006 6:50 PM
Subject: Timing gear and intermediate shaft the same?


>I was looking at Autotech's adjustable timing gears for the 16V motor
> and noticed that they have a lightened cam gear on sale for $39.  This
> lightened cam gear does not adjust, it only reduces weight.  They also
> have a lightened intermediate shaft gear for $69.  Won't the cam gear
> work as an intermediate shaft gear?
> 
> Here is the link to Autotech's site showing the gears.
> 
> http://www.autotech.com/prod_engine_camgears.htm
> 
> Next, does anyone have any experience advancing adjustable timing
gears
> on the 16V motor?  If so, did you notice any change in torque?  How
many
> degrees of advance did you try?  Some of the new gears offer 10
degrees.
> 
> Thanks, Rick. 
> 
> 
> 
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