I had RC needles, with jets turned down as much as they would not fall
off. I even tried drilling the jets 4/1000 oversize, but I could not
make the HS6's work. I also tried various float needles, larger hoses
to connect the jet to the bowl, etc. Others have had similar problems
getting the HS6's to work. I finally gave up and since my race group
allows Webers, I bought and installed a set. They have been great!
Joe(B)
----- Original Message -----
From: "kas kastner" <kaskas@cox.net>
To: <N197TR4@cs.com>; <jaboruch@adelphia.net>; <fot@autox.team.net>
Sent: Tuesday, October 14, 2003 11:31 AM
Subject: Re: dyno test of TR-4
>>
> So Joe, adding the air filter reduces the amount of air and
therefore
> indicates to me that there is either insufficient fuel supply (too
small a
> needle and seat) or a lean mixture at that higher rev point (needle
shape).
>
>
> ----- Original Message -----
> From: <N197TR4@cs.com>
> To: <jaboruch@adelphia.net>; <fot@autox.team.net>
> Sent: Tuesday, October 14, 2003 4:48 AM
> Subject: Re: dyno test of TR-4
>
>
> > Kas recounts some dyno work on a TR250 engine and making bigger HP
by just
> > changing velocity stacks.
> >
> > I am getting more anxious to check the efficiency of the ones my
son Sean
> > made out aluminum billet. Unlikely, but I think it would be a hoot
if they
> turned
> > out to be heads above the alternatives.
> >
> > > I had a similar experience a few years ago with HS6 carbs. I
could
> > > not get any power over 6000 rpm on the track. I just could not
get
> > > them to flow enough fuel. I put air cleaners on to add some
> > > restriction and gained 300 rpm on the straights. I did not,
however,
> > > go so far as to add the weber style spacers. Joe(B)
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