heat risers

["PaddyCaddy ." <paddycaddy@xxxx>]

I agree that the chokes - obviously - will adjust back to "normal" a bit 
slower just as the engine will warm a bit slower.

But I'm not sure what would make the plugs foul. Applying this theory 
that plugs foul if the the engine does not immediately warm up would suggest 
that the higher fuel/air mixture needed while the engine is still cold would 
regularly foul plugs in colder climates where the engines obviously would 
take much longer to warm to operating temperature - especially this time of 
year(or in August for our compadres down under).

Except for show cars, and for those seeking optimal performance and 
especially less risk, I still say that the restriction in the exhaust and 
the very real potential for siezing still outwieghs these other concerns.

Purposely restricting exhaust flow just strikes me as a crazy idea from 
the getgo - especially in a crossram. Jamming/reversing hot, dirty exhaust 
gases back into the manifold and greatly increasing back pressure back 
toward the combustion chamber I suspect wreaks far more havoc (exhaust 
valves?) than whatever damage may or not be done by not forcing the engine 
to warm a minute or two earlier.



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