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I installed my latest iteration intake manifold today, and it
works!
I picked up 300 rpm static (4600 to 4900). Climbing at
120 IAS, rpm went
from 4800 to 5100. All of this at OAT over 100 F.
Definitely more snap
in the takeoff and climb.
I will send
more photos in separate e-mails to avoid being blocked!
My goals included getting it to fit under the cowl (did I
mention I hate fibreglass work?), miss the oil filler tube and get the
runners near the correct length.
Now I have so much power
that the cooling can't keep up, so I am trying to
expand my cowl exit
area. Even with the cowl flap completely removed, the
exit/intake
ratio is only 1.05. My resident experts suggest 1.2 to 1.5. I
REALLY
don't want to whack that painted cowl, so I will try other ways
to
make it think it is bigger.
Ideas?
Thanks,
Bill Eslick
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Bill,
How sure are you that it is the exit that is
restrictive? Have you had an opportunity to measure the pressure on the
down-side of the radiators? (i.e. under the cowl?). Might be worthwhile
before cutting the cowling to make it bigger.
It is encouraging to see you getting more power with
the improved manifold. Every bit of information helps those of us
following.
Bill schertz |