Boyesen or R&D Reed stuffers??
Erik Edmister
Boyesen came out with some aluminum reed stuffers - any thoughts on
the performance over the injection plastic R&D units? Specifically
for a Yamaha 701 dual carb engine?
Todd Hammock
I have not tried either product yet, therefore I cannot say that the
following is personal experience or fact. I can tell you what I was
told about both products while I was researching this question for
myself. I do not have any affiliation with either company.
The R & D stuffer is made out of plastic. Over time, with temperature
and fuel, the horizontal wing starts to warp and get in the way of the
airflow. Otherwise, I was not told of any other problems.
The Boyesen is made out of aluminum, which will not ever warp from
temperature and fuel. One of the salient features of the Boyesen is
that the wing is tilted approximately five (5) degrees down. This helps
direct additional airflow to the bottom reed, promoting even wearing of
the reeds.
Which ever stuffer you choose, I was told to epoxy the sides of the
stuffer to the cages.
I have a 94 WaveRaider that I plan to add the Boyesen stuffer, Boyesen
Pro Series reeds (for modified), and a R & D case stuffer to before
spring.
Regards,
Todd Hammock
Dan DePardo
Todd Hammock <t-ha...@ti.com> wrote:
>I have not tried either product yet, therefore I cannot say that the
>following is personal experience or fact. I can tell you what I was
>told about both products while I was researching this question for
>myself. I do not have any affiliation with either company.
>
>The R & D stuffer is made out of plastic. Over time, with temperature
>and fuel, the horizontal wing starts to warp and get in the way of the
>airflow. Otherwise, I was not told of any other problems.
>
Well, (dammit) I just installed a set of the R+D thermoplastic
stuffers into my 750 stroker cages...where were you a with this
info a month ago!? ;-D I was considering the Westcoast stuffers
which are aluminum too.
I tear down my engines every winter, so I'll keep an eye on
the warping deal (thanks!) and if it happens to my set, everyone
will read it here in BIG BOLD type! I was already a little annoyed
by the $45 price tag on two chunks of plastic, and that didn't
even include replacement gaskets...
>The Boyesen is made out of aluminum, which will not ever warp from
>temperature and fuel. One of the salient features of the Boyesen is
>that the wing is tilted approximately five (5) degrees down. This helps
>direct additional airflow to the bottom reed, promoting even wearing of
>the reeds.
>
>Which ever stuffer you choose, I was told to epoxy the sides of the
>stuffer to the cages.
>
I agree with the use of epoxy, etc. to keep 'em in place. I also
advocate checking the "match" between the stuffer and the intake
manifold. My WPP intake needed a little massaging to match the
stuffers. I used 3Bond 1211 to hold mine in place.
Dan "If you want airflow velocity enhancement...get stuffed!" DePardo
Erik Edmister
Todd Hammock <t-ha...@ti.com> wrote:
><snip>
Thanks, I already ordered a set of the Boyesen to replace the R&D on
my SuperJet. This decision was only based on the metal vs. plastic
issue - I have no idea if they will provide any noticeable performance
benefit. When I initially installed the R&D units on my SJ there was
a noticeable increase in throttle response. The R&D units will be
'stuffed' into my WaveVenture. I'll take the advice on 'gluing' them
in place although I'll probably use silicone instead of epoxy.
W.S. O'Neal
R&D Racing's Bill Chapin, A good friend of mine, has spent many hours
working with Reeds over the past 2 decades. He personally designed these
stuffers. I use rotary valves, so I shouldn't be on this thread at all,
BUT, Bill's garage has a cabinet in it that is as beautiful a piece of
furniture as I've seen in mansions. Do you know whats in it? About 14
World Championship Trophy's for reed motored Kawasaki's and Yamaha's. More
than anyone else. $40.00 is cheap, even if they are made from clay!
Bill (bet on winners) O'Neal--
Bill @ E-MAIL: Water...@worldnet.att.net
Erik Edmister <eedm...@mdc.com> wrote in article
<5cbbbi$i...@lex.zippo.com>...
Erik Edmister
"W.S. O'Neal" <Water...@worldnet.att.net> wrote:
>R&D Racing's Bill Chapin, A good friend of mine, has spent many hours
>working with Reeds over the past 2 decades. He personally designed these
>stuffers. I use rotary valves, so I shouldn't be on this thread at all,
>BUT, Bill's garage has a cabinet in it that is as beautiful a piece of
>furniture as I've seen in mansions. Do you know whats in it? About 14
>World Championship Trophy's for reed motored Kawasaki's and Yamaha's. More
>than anyone else. $40.00 is cheap, even if they are made from clay!
>Bill (bet on winners) O'Neal--
>Bill @ E-MAIL: Water...@worldnet.att.net
What's your point? Who gives a f' about this info. I'm sure someone
could heap similar compliments on Eyvind Boyesen. All I care about is
how the part performs vs. how much it costs. It was a questionable
choice to switch since I don't have the performance information, but
the issue with the plastic not holding its shape (and thereby negating
some of the benefit) is definitely plausible.
W.S. O'Neal
Erik, You are right, I was off the subject and I apoligize.
Erik Edmister <eedm...@mdc.com> wrote in article
<5cdffe$9...@lex.zippo.com>...
Erik Edmister
I got a set of the Boyesen to install in my SuperJet and went to
replace the R&D stuffers this weekend. Sure enough, the R&D units had
warped significantly (both sides had the same downward bow distortion
- measured about 3mm). Don't know what effect this has on the
performance of the stuffers but I will be calling R&D to get the story
as I planned on installing the removed R&D units in my WaveVenture.
Dan DePardo
Hi Eric;
I'm *very* interested in what they have to say! I installed a set of
R+D stuffers into my 785 cages...and I intend to scope 'em out at the
end of the season, after after a 100 or so fuel/oil baths.
I suspect that the "bow" doesn't hurt airflow too much, (chances are it
isn't helping tho') and the main benefit to the stuffers is reducing the
"volume" of the intake side of the cages, which improves airflow velocity.
Without stuffers the intake runners just "dump" into the much larger in
diameter/volume reed cage, which has an ungood effect on mixture velocity
into the case.
Approximately how many hours do you have on your stuffers?
Dan "I knew I should have used the aluminum stuffers" DePardo
Erik Edmister
Dan DePardo <ddep...@eecs.ukans.edu> wrote:
Called R&D, they said that the distortion in this product is a known
effect and that it doesn't really affect performance (wha'd'ya expect
them to say). Anyway, I'm going to turn-over the stuffers (bow side
up) and install them in the 'Venture. The Boyesen 'stiffers' will be
installed in the SuperJet. The R&D set had about 80 hours on them (20
weeks of use - 4 hours average per week).
SHuff40430
I just installed carbon fiber Boyesen's my boat's not been in the water
yet but there's a noticable increase in throttle response. * BEWARE* you
cannot install R&D stuffers with this reed!!!(V-MAX only!!!).
750ZXI owners, GET your head milled!!!!!my coompression was 140-145psi
it's now 175psi. you be happy with the results.