Intake runner lengths

[Bruce Plecan]

There is only one system I know of using the 2nd Butterfly/runners,
and in that system them turn on a second set of injectors, the
secondary injectors run at the same duty cycle as the primary.
BTW, on that system the sec buttterfly was operated by a vac.
diapharm.  While seemingly crude it was what the ZR-1 vettes
used
Bruce


>I am modifing a OEM multipoint inlet manifold that has dual runner lengths
>there is a butterfly
>arrangment inside the manifold that alters the runner lengths at a desired
>engine speed.
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>What I am wanting to know ( while we are talking runner lengths) is what
>sort of FUEL and ignition MAP modifications should I be doing for this type
>of modification. Assuming that I will be having ( hopefully ) a much
flatter
>torgue curle over the entire RPM Range. For those in Australia interesting
I
>am using a ford EF/EL 6 cylinder manifold that is modified to fit a 265
HEMI
>tripple weber manifold. I hope its worth the effort We will see. Anyone
>outthere done a simular mod ??
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>Best Regards,
>
>STUART BUNNING
>SALES ENGINEER
>KENELEC PTY LTD
>
>23-25 REDLAND DRIVE
>MITCHAM VICTORIA 3132
>AUSTRALIA
>
>PHONE:  61 3 9873 1022
>FAX:    61 3 9873 0200
>EMAIL:  stuart at kenelec.com.au
>WEB:    http://www.kenelec.com.au/
>