Originally Posted by
tnord
i don't really know what "myth" i'm perpetuating, because what were legal cams per the FSM, suddenly became illegal in mid-2006. and not only the pro-motor cams either, some coming out of crates weren't passing either.
The myth is that just because the FSM specs are not all encompasing, that you have the freedom to do whatever you like in those areas. I don't care what number is stamped on those cams, if they are not the same as a stock from the showroom floor car, they are not legal .period. There is no rule that states cams must match FSM specs (edit - well actually there is, does that shoot a hole in this whole argument? It hinges on definition of factory specifications, and whether that is manufacturing specs or FSM specs), there is more importantly no rule that allows use of a cam other than stock - you put one of those 'magic cams' in a cam doctor next to a cam purchased from the local dealership parts counter and they don't match - in any measurable way within the capability of the measuring equipment - then it ain't legal.
There is no FSM specification for the internal shape and volume of my intake manifold - does that make it A-OK for me to source the castings and make some new ones that flow better and look the same, including the VW part number?
EDIT - see edit note above, I should double check before posting...
Here is the rule in discussion. (sorry it is so small)
p. All engine components not otherwise listed in these rules shall
meet factory specifications for stock parts. Where factory
specifications are absent or unclear, e.g., cylinder head thickness
and/or combustion chamber depth, etc., the Club may
establish an acceptable dimension and/or allowable tolerance
from stock. Engine compartment cosmetic trim pieces may be
removed.
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