6 pack manifold for w2's

The 6 pack intake can flow some pretty good numbers and has the ability to produce enough power to get a car into the 11's. The problem with the intake is a multi point issue of it being a dual plane with tall carb heights and sharp angles within the intake. Some ports can flow a good deal more than others. Some flow poorly for serious power. Porting the intake can help but there isn't a lot you can do for it due to the limitations of it being a dual plane.

Current cylinder heads like the Edelbrock's can be ported to out flow the intake when the opposite should be the case. The intake should out flow the heads. Often this is the normal limitation to most strip rides.

A good exams of this is the old Holley strip Dominator or the MP single plane intake. They were designed when the best head was the stock head. Swap out the intake for an Indy single plane and power goes up and goes up well.

The last issue of the 6 pack is the carb capacity. The 3, 2bbl.'s flow only so much air. Do not be confused by there rating since there rated differently than a 4bbl. carb is. The mechanical carb upgrade helps a lot.

A 6pack can operate well in it's 2500-6500 listed range. Stretching it out a few more RPM's is possible. But not really designed for it. It is a power house for sure. You can really get these systems to sing. For track use only, I think a 4bbl. Would not only be simpler to use and operate but also tune and not worry about in the long term.

If I sound a little anti 6pack, just a FYI, I'm building one now with 11's in mind. It will sit on ported Edelbrock heads on a 360 backed by a 4spd and 4.10's bound for the street. A Lunati solid roller will be employed to take advantage of the heads flow capablities as much as possible.

I know the bottle neck is the intake.