Re: alfa-digest V7 #250

[Formeister@xxxxxxx]

In a message dated 11/12/98 3:59:49 PM Eastern Standard Time, owner-alfa-
digest@domain.elided writes:

> From: Robert_A_Brady@domain.elided (Robert A Brady)
>  Subject: Cam Lobe Centers and Caps
>  
>  Here's a quick question to the experts (Fred et. al.).
>  
>  I was under the impression that the scribes on the cam caps were not the 
> same 
>  from car to car.  That is, on a '74 USA 115 car, the scribes corresponded
to 
> 
>  the cam timing of 114/102; on a 1600 Veloce, they corresponded to 108/108. 
>  So, when you put your 10548 cams into a '74 gtv (hypothetically speaking,
of 
> 
>  course :) you needed to put new scribes on the caps, corresponding to the 
>  99.5/99.5 timing of those cams.
>  
>  AR Ricambi sells a "cam timing kit" that provides templates for rescribing 
>  the lines, which implies that the caps are different for different cams.
>  
>  As I write this, it seems ridiculous that the caps would NOT be uniform for
>  all the cars.  Rather, it seems that the scribes on the CAMS should vary 
>  according to that cam's lobe centers.  Thus, the bozo who put the 10548
cams 
> 
>  into his gtv thinking that they were at 99.5/99.5, actually timed them at 
>  85.0/96.0..... which might explain some things.....
>  
>  So the question is: are the cam caps' scribes put in uniform places?  If 
> that 
>  is true, then the cams would have scribes on them corresponding to their 
> lobe 
>  centers.  If that's true, then the intake and exhaust cams aren't 
>  interchangable.  Finally, if that's the case, how do you identify an intake
>  vs. an exhaust cam.
>  
>  Bob Brady, DVAROC (recovering idiot)
>  
>  

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