RE: Heat crazed mad scientist

["Mark M. Pikas" <mpikas@umiacs.umd.edu>]

> -----Original Message-----
> From: Bruce Plecan [mailto:nacelp@bright.net]
> 
> I may be wrong, but I've never heard of any totally 
> independent, accurately
> test comparision, where they found any performance gain using them.
>   To really get rid of the turbulence that they claim they do 
> takes about a
> 10:1 ratio of mismatch to lenght correction.   Sooo, where 
> the difference in
> bores of .5" means the airfoil would need to be 3"s tall to really be
> effective.  Even looking at the venturis in a carby are 5 to 
> 7d, and I'd bet
> with the radiius most of them have where the air splits makes 
> them even
> worse then the "shearing" the stock TB does.
...
> > I'm looking for one of those airfoil thingies that JET sells for the

Actually, I think that you're right with the normal setup, but I was
surprised with the effect that it had on my Ram Air ('97 WS6 TA).  I don't
think that it made any difference at the track, but driving it around town I
noticed a big difference in engine smoothness and low end.  It was enough of
a difference that other people noticed it standing next to it idling.
Before I installed it my brother used to say that it idled like it had a
bigger cam installed in it, it went away when I installed the air foil (my
brother was actually standing next to it in the staging lanes at the track
and noticed that something was different with the idle and asked what I did,
that was the only change and it still has a stock exhaust).

Mark (the idle came back after I messed with other things ;-)
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo@lists.diy-efi.org