Jerry Hey wrote:

A month ago I posted a jpeg of the prototype p port throttle

body.  The

main criticism was that the butterfly was the same size as the

port:

i.e. 1.5 inch. Since the butterfly somewhat blocks the  passage,

it had

to be made larger to allow for enough flow.  It was recommended

that

the butterfly be enlarged to 1.625 in.  This we have done.  We

also

added a throttle stop so that idle can be set.  And we

reengineered the

attachment of the butterfly control arm so that it cannot

accidentally

come off the shaft.  The shaft turns in bearings and is silky

smooth.

   In the first photo the little tube is a pressure tap required

by the

EC2.  The long screw is the throttle stop. At its base, hardly

visible

is a nut that locks it in position.     The screw sticking out

of the

control arm contacts  the bolt to set the idle.    The second

photo

shows the butterfly axle and the bearing which is retained by

the

little screws. The third photo shows the butterfly from the

intake

side.  You may be able to see that the bore  is tapering down to

the

butterfly (1.625 in)  It starts out at 1.75  i.d. to match the

bore of

the manifold tube.  The last photo is from the perspective of

the

rotor.  In this view the bore is tapering down from the

butterfly to

the 1.5 exit.  Note the thick (.375 in) walls.  This is material

for

the die grinder, if you want to experiment. .  Our  port is

sized to

run great up to 8000 rpm so  you may not want to touch it at

all.

-- Phil Flaugher wrote:

Beautiful! Hope they are affordable (always relative, isn't it?)
when my time for them comes.....
Congratulations on being a "doer". Seems like everything you touch
has practical application....

Phil

Thank you Phil,   I had a hand in building the prototype but quickly
reached the point where a real machinist was needed.  I have not
determined price yet.  Keep in mind there will be other expenses along
the way.  The housing will have to be bored,  the insert epoxied in
place and blended with the housing.   An intake manifold will be
needed.   However, the throttle body was the big deal,  now that it is
a reality the rest should come together in a few months.   Jerry

 
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