The real basics

[Bruce]

For anything less then 330ish HP I like the Cross Fire, but it takes work to
get it right.  The Weiand 7546, for a low single plane, and a 7525 for a
high single.

I like having all the cylinders working at the same level.  With the cross
fire all 8 runners are at least the same length.  With a single plane you
have two lengths of runners, and the dual planes **4** sets of different
lenghts, and 2 different elevations ( Only thing worse in HWO, is 8
different lengths at 8 different levels).

Not to be too critical, but with a dual plane if the jetting is anything
close, with all the different runners, it's gonna kinda run well every
where.  With carbs the metering is so darn course, that it just kinda sorta
balances out.
Bruce


> Bruce,
> What, in your esteemed estimation would be one (or several) "well thought
out
> manifolds" for TBI?
> What are the downsides to something like a dual plane Performer? I've had
good
> perf with them on carb'd SBs, but TBI is it's own thing. :-)
> TIA!! (and thanks for the note, it's going into my binder with the other
stuff!)
> Eric D
> 88 K30 Blazer

> > <snip>
> > TBI, you want to use a well thought out manifold. Single plane is best.
> > You need to run some controlled amount of manifold heat, for High RPM
> > useage, since you lose the atomization advantage there. No real need in
> > trying to run a TBI off of a TPI ecm, BTDT. You want the faster pulsing
> > rates to help with the atomization.
> <snip>

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