----- Original Message -----
Sent: Monday, May 31, 2004 8:34 PM
Subject: [FlyRotary] Rev-2.1 part 3
Part
3.
I ran this today with the short sceet hoses that you see in the
pic, and got a very solid 5020 rpm, with the default timing advance.
FWIW, the EM-2 said 140 HP, 74% power. Yesterday, the rpm was jumping
all around, and I suspect that it was due to having the prop blast going
perpendicular to the TB inlet. At least it doesn't look like the extra
length of tubing will hurt anything, which is good, because there's no way
I'll be able to fit a plenum between the TB and oil fill tube. I'm
probably going to concentrate on putting some sort of plenum just past the
dipstick tube, but I haven't given all that much thought to it yet.
It's interesting to note that today's runs put
runners at about the same length as with the previous intake arrangement, and
yet I still get about 150 rpm more. This means the extra power came from
either moving the injectors closer (not likely), or from cleaning up the
airflow inside the intake where my two runners join. I'm convinced that
was the case, because it was bad before. This may be good news for
Paul Conner. If I were you, and I felt good about the smoothness of the
runner to intake joint, I'd find a way to put two injectors (since you only
need two) in the stock primary location, or in the manifold like I
did with my secondaries. All you have to do then is plug up the TWM
injector holes, and they sell plugs for those.
Cheers,
Rusty (I'll get to John's message in a
while)
Hey, Rusty....thanks for sharing all the
pictures with us....I have considered moving my injectors to the same location
on the intake manifold as you have done, but I would like to first install my
prop and see what kind of static RPM I get in it's present configuration. I
like the way my throttlebody tucks itself neatly away and the air cleaner fits
perfectly there without any interference with anything on the engine, or the
cowling. Of course moving the injectors would not affect that. I took a
lot of time in fitting the tubes into the intake, then sent it off to Ed at
Tech Welding for final assembly. His welds are some of the smoothest I
have seen, so I am hoping that I have a smooth transition from casting to
intake runners. Hopefully I will find out in two weeks or less.
Here are a couple of photos. Thanks again for sharing your info and
results. Paul Conner
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