"cmyr" wrote in message
...
On Jun 11, 11:32?am, George wrote:
I believe that Ballenger Headers had the "pickle" located in the
collector of 4 tube equal length headers and there was also the
"coanda" effect which is specifically what I think you were speaking of.
? It was used experimentally in a truly weird exhaust setup in the early
days by of one of the major racing teams back in the mid 60s, but my
memory is a bit foggy for specifics that far back, such as who or on
what car, sorry.



cmyr wrote:
? ?Going back to some hot rodding roots,I believe V.E. was increased
in the late '60's-70's thru the use of a specially designed double
cone affair placed in the collector pipe of a tuned exhaust
system,which created a stronger vacuum effect , creating stronger
scavenging of exhaust, and to some extent , helping draw more fuel/air
mix into the cylinder.- Hide quoted text -

- Show quoted text -

You remembered the word I couldn't put my finger on........coanda

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Back in the 70s or so, there was a three cylinder two stroke radial, with
all three cylinders in a common crank case - that used the exhaust system
exclusively for scavenging the engine. There was no intake draft without it.

It was featured on an ultralight one year at OSH.