I was looking through some old posts and picked out some quotes that
essentially support using an 18" can, (and the two brothers system
comes with a 17 3/4" can or something close to that as default but
otherwise on Hindles you have to say what you want), the post excerpts
are listed below. What is cool ... is if you measure the reflection
baffle at the front of a stock can to the end plate it is 9 3/4 inches
.... then the tube exiting the can is 8 3/4 inches and 1 inch away
from the reflector at the front. If you measure the end angle at the
tail of the stockers you end up with an arrangement that aims the
pluses right down the middle of the exit tube, (after bouncing off the
front reflector ... the holes are arranged so that the exhaust cannot
directly exit via the pipe). Anyhow .... this averages out to an
approximate travel distance of 18 inches to get out of the can ...
(which is a multiple of 9 inches and a magic number for resonance near
our peak HP operating range). Additional support for the fact that a 1
3/4 baffle is going to be close to stock performance appears when
calculating the exit surface area of the containers. On the newer
stock pipes there are 8 staggered holes at the front of the can ...
this represents a total exit surface area of 3.14 inches adding the
two cans together but of course you have yet to get out the end of the
two 1 1/4 inch tailpipes and they calculate to a total exit surface
area of 2.45 inches ... On a single canister with a 1 3/4 hole you end
up with a total exit surface area of 2.40 inches ... cool huh ?? It
appears there may be a relationship between the exit area of these two
systems and their performance not to mention support from the stock
design implying that 18 inches is an important number. Soooooooo ... I
realize that is nice to have the "in" hole a little bigger than the
"out" hole ... but it looks like an exit pipe in the range of 1 3/8 to
1 1/2 inch might suffice in unrestricting the front end surface area
of 3.14 inches which by the way happens to be very close to the exit
surface area on a 2 inch single can, (which is also 3.14). Isn't math
neat ?? Am I drinking too much coffee again ?? OK ... go ahead ...
beat me up ....
Previous post quotes:
"My bike picked up 3 hp going from the 16" to the 18" as well as 2 ft
lbs of
torque so I would definitely recommend the 18". "
"I had ordered the hindle 4/1 setup from PCW, 2" polished aluminum can
and
forgot to spec the length.Due to comments from Don and others I wanted
the
16" can and told Scott at PCW on the return call. Scott said they sell
the
18" with the setup because the Dyno runs show 2-3 horsepower increase
with
the longer muffler. "
" Do what scott at pcw says. I have the 2". Its perfect! And not
annoyingly loud
either. "
" Can anyone that has the Hindle with the 2" straight bore polished
aluminum
can give some input on how loud it is.Scott at PCW claims you actually
will
lose a little power over stock by using the 1 3/4 stealth canister. "
" Scott from PCW said that the 1 3/4 wasn't a straight thru exhaust
like the
2".According to him it wraps and actually backflows to reduce the
sound.I
trusted him . He also stated that the stock system designed for the
Max has
good flow and hard to beat, other than the increased weight as opposed
to
the Hindle setup. "
end of post ......
campbell
----- Original Message -----
From: <[EMAIL PROTECTED]>
Subject: Re: Kerker Vs. Hindle
> Hi Phil,
> When I bought my max, I was on the phone with them (Scott) in
regards to the
> best pipe to use.
> snip <
> Stan
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