2 Cycle Setup on a Pipe

[David Lockhart]

Assuming the exhaust timing is the only difference, the equivalent pipe tune
length for the 160 will be a little shorter  (.5 to 1").

The lower exhaust timing typically flattens the torque curve and reduces the
amount of unload in the air (simple answer).

Regards,

Dave Lockhart
DaveL322 at comcast.net


----- Original Message -----
From: "Brian Young" <b4598070 at yahoo.com>
To: <discussion at nsrca.org>
Sent: Tuesday, March 30, 2004 5:10 PM
Subject: Re: 2 Cycle Setup on a Pipe


> Exhaust timing is different, so I pipe lenght should
> be different.
>
> 1.45 timing is about 147, 1.60 timing is about 140.
>
> What is the affect of reducing the exhaust timing on
> the 2-stroke?
>
> --- randy10926 at comcast.net wrote:
> > Is the pipe length for the Webra 160 the same as for
> > the Webra 145?
> >
> > Randy
> > > Ditch the MC carb during testing and put a regular
> > 1.45 carb on it.  The
> > > bench mount it.  I have been testing AeroSlave
> > carbon pipes for a year now
> > > and have a great setup for quickly getting tuning
> > length and rpms.  I have a
> > > "trombone" made from two pieces of silicon coupler
> > with a short length of
> > > aluminum header pipe in between. By starting with
> > everything extended to the
> > > extremes and sliding the whole mess together I can
> > watch a tach and take
> > > readings real time.  Takes about 5 min to get the
> > numbers and then setup the
> > > flying lengths.
> > > --Lance
> > >
> > > ----- Original Message -----
> > > From: "Brian Young" <b4598070 at yahoo.com>
> > > To: <discussion at nsrca.org>
> > > Sent: Monday, March 29, 2004 3:16 PM
> > > Subject: 2 Cycle Setup on a Pipe
> > >
> > >
> > > > I have recently been tuning on my exhaust and
> > have a
> > > > basic understanding but want some more
> > information.
> > > >
> > > > I have a Webra 1.60 w/ MC carb and a Webra pipe
> > w/ a
> > > > disk baffle.
> > > >
> > > > Im gradually shortening this pipe setup hoping
> > to hit
> >
> > > > the correct length. The problem I find with this
> > setup
> > > > is the MC carb doesnt lend itself to a test
> > stand
> > > > since the mixture is servo controlled. So I
> > shorten
> > > > pipe and fly, shorten and fly.
> > > >
> > > > The thing Im most curious about is if you had a
> > setup
> > > > no one else has how do you determine a close
> > first
> > > > guess for the pipe length if you want to cut
> > down the
> > > > trial and error? I had a starting point but was
> > just
> > > > puzzling over this.
> > > >
> > > > __________________________________
> > > > Do you Yahoo!?
> > > > Yahoo! Finance Tax Center - File online. File on
> > time.
> > > > http://taxes.yahoo.com/filing.html
> > > > =====================================
> > > > # To be removed from this list, go to
> > http://www.nsrca.org/discussionA.htm
> > > > and follow the instructions.
> > > >
> > >
> > > =====================================
> > > # To be removed from this list, go to
> > http://www.nsrca.org/discussionA.htm
> > > and follow the instructions.
> > >
> >
> > =====================================
> > # To be removed from this list, go to
> > http://www.nsrca.org/discussionA.htm
> > and follow the instructions.
> >
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Finance Tax Center - File online. File on time.
> http://taxes.yahoo.com/filing.html
> =====================================
> # To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>

=====================================
# To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.