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Message
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)
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