> > Was it you that said the carby manifold shown on this site a
couple of days

 > >ago wasn't too good.
 > >I was just wondering why it wasn't very good - was it  a design

problem ?

 George, The particular manifold shown is an unknown quanity.
 My personal experience was on RX 2's and RX 7's used as road racers
 and autocrossers.

 Most of the Webber manifolds we saw had VERY LARGE runners as
 far as the engine was concerned the entire manifold was like a big
 vacuum plenum. Run very rich they could work well on the top end.

 Mid-range sucked and off idle stumble were big problems, which
 required you to run the low end even richer, to prevent stalling.
 This wasn't just a webber problem. Many set ups were made using 4
 barrel carbs which had similar problems. Most were just short
 runners with a plenum under the carb V8 style The 4 barrels worked
 better on these crude manifolds because the primaries were
 small and gave a bit better low end.
 If you are doing anything new George get a good fuel injection.
 If you don't like Tracy's, Motec makes a good engine management
 system with ignition and FI. A bit pricier though. Around 3K
running. Bill Jepson

Ken Welter wrote:

  Jepson you are right whit what you say about the rich rough running
at the low end and I would not consider running one on a car but none
of that matters on a airplane, it runs fine on the mid and upper end
where you fly, I have 1100 hrs flying on a Weber and it work fine and
it is just to simple to hookup a fuel line and throttle cable and go
fly.

  Ken Welter

Interesting, Ken.....do you have carb heat and are you able to lean it for
altitude?  Thanks in advance for your reply.  Paul Conner

 
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