We can use that throttle body but two 1.5" butterflies are
half the area you need. You need a three incher with seven square
inches.  You could get another one like it and gang them
together for four throats. Not much choice as I think the
MicroTech requires throttle position. Not ideal as four butterflies
don't pass as much air as one large one of the same area.
However no choice in the matter. If I am wrong about
the MicroTech you could get more power by selling that
TB on E-bay and building a 3 incher.

These runners are long enough to get some benefit of
tuning at 6000 RPM.

I need the distance the spar is down from the top of the firewall
and the height of the spar. How far aft of the spar does the
strake extend?

Here is a preliminary layout. Very similar to what Perry is running.

The snorkel is on the bottom of the strake.

Paul,
How long are those intake runners in that layout?

I am considering changing to an RD-1C drive (2.85:1) and I think that my
wrap over manifold was more appropriate to the 2.17 to one ratio. The wrap
over manifold requires modifying the upper cowl to get clearance. So if,
with the 2.85 I can get a manifold on the engine's left side, maybe I
canpull air from a snorkel on the lower cowling, and have the injectors on
the individual pipes.
Bill Schertz
KIS Cruiser # 4045

15 to 18 inches.  I need to adjust them as soon as I get more dimensions on the
strake. Are you thinking of trading in your PSRU for a 2.85:1?

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.