Runner Lengths

[dennis]

Buy David Vizard's Book "How to build Horsepower, Vol.2" Nuff said.

--- "Wes Branchflower" <hemi_265 at hotmail.com>
> wrote:
>Hello everyone, this is my first message here.
>I have a problem.
>I'm making a MPI system for my Chrysler 265cu (4.3l) inline six hemi motor. 
>I'm going to be using Ford 4.0litre injectors, and two XF falcon throttle 
>bodies (70mm diameter).
>
>I have two manifold idea's in mind. The first is, (the ascii drawing below) 
>a straight pipe (90mm) with 6 smaller (50mm) diameter pipes going to each 
>inlet port. The two 70mm Throttle bodies will be mounted on a flange on the 
>70mm pipe, equally spaced apart.
>
>
>|| || || || || ||
>|| || || || || ||
>|-----------------|
>|  XX      XX     |  XX = Throttle body.
>|-----------------|
>
>
>OR
>    _______        _______
>a  (   XX  )======(  XX   )
>   / /| |\ \      / /| |\ \
>  / / | | \ \    / / | | \ \
>/ /  | |  \ \  / /  | |  \ \
>
>XX = throttle body.
>===== - balance tube
>
>
>
>I have a few questions:
>
>1. Is there any difference between square intake runners and round?
>2. One the 'first' manifold, would it be better to mount the two throttle 
>bodies next to each other, or on either ends of the manifold, or equally 
>spaced?
>3. How long should the intake runners be? what are the 
>advantages/disadvantages?
>
>should i use MAP or MAF?
>
>Thankyou all very much for you time and help.
>
>Cya!
>
>
>________________________________________________________________________
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==
Dennis Doza II

87 Shelby Charger Black/Silver 15.8 at 88mph
DAILY DRIVER

87 Shelby Charger Garnet/Silver 12.44 at 108.96mph
DAILY RACER:)

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