Bill,

>From your experience, would Paul's pipe bends be of a suitable diameter for
use with the Weber or will they be too large?

I understand from my reading that for the intake, the rotorary needs velocity
more than volume - the other side is that a larger pipe dia. will reduce the
internal friction.  Some trade-offs.

Also, does the run of 17-23" begin at the block and run to the carb body or
to the venturi?

Joe Graham

What pipe bends? I don't have no stinking pipe bends :) I did have some 2" 
.065 wall and 1-3/4" .065 wall tubing bends but they are all sold.

That velocity stuff is an urban myth. The record for NA HP at 
6000 RPM is with these huge pipes. 240 HP. None of these after market 
tuning weenies have come even close to this number. If that were the 
case why would bridge ports combined with side ports develop more power 
than side ports alone? That velocity crap keeps coming up over and 
over again.

The reason the RX8 engine has more power at any RPM you wish to
choose is.... it has 30% more intake port area.

That is not to say there is not an optimum diameter at a specific
RPM. Perhaps you are thinking of low RPM torque.

BTW carbs need high velocity to get good mixture signals and IMHO
that is fooling some people about runner area who should know better.

EFI has no such problems.

Paul Lamar


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