Cam Lobe Centers and Caps

[Robert_A_Brady@xxxxxxxxxxxx (Robert A Brady)]

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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