At 05:01 PM 1/20/2002 +0100, r.v.lent wrote:
>But what will happen when I make an intake manifold like on the 300 D
>with one carb on each side of the engine ( Yes I can make this myself )
Even if you could cast a dual carb manifold yourself, I would not recommend
it. There is a lot of "science" into designing an intake manifold. There
are lots and lots of parameters (like air flow off the carb, and Air/Fuel
distribution) that its highly unlikely you will get it right by
chance. The OEM's back then did these designs by trial and error, and with
lots of the engines on the dyno, they tried to come up with the best
compromised design. Now, these things are simulated in computers removing
most of the required prototyping and testing. Also, nowadays with port
injection, their work is somewhat simplified since they do not need to
worry about A/F distribution and gasoline droplets accumulating or staying
atomized, or manifold heating, etc.
>The long runners were optimized for high rpm use and would run poorly as a
>street engine. A lot like running a tunnel ram manifold on the street.
Correct, but this refers to the later model ram manifolds on the 413s. I
don't think that ram manifolds were installed on the early Hemis... These
ram manifolds are even tougher to design since there is an additional
parameter, the pressure waves. Also, due to the long distance between the
carbs and the ports, it must be a real design headache to ensure good fuel
atomization. That proves the advanced engineering of Chrysler...
D^2
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