Ken Powell wrote:

OK, use the butterflies and shafts out of the Mazda throttle body - good
idea.  Does the 'body' need anything special for a bearing surface for
the throttle shafts or can we just drill the holes in the tube?  Is
there any off the shelf tubing with the correct diameters?  ( I can
check this when I get home and can measure the throttle plates - I will
also take another look at the drawings that you made last year).

Ken P.

Don't know about the tubeing with 1/4 wall. Sounds like special order.
We might need to make it out of bar stock.

These are a bit on the small side at only 1.75 inch in diameter.
The shaft too is a bit of a bad fit as it is too long. Perhaps
you could look at a big Holly or something like that
and see if you can find a better shaft and throttle plate.
Something on the order of two inches would give more power I suspect.
1.75 is probably only worth 210 HP at 6000 RPM.

Todd Carrico wrote:

I would think that port timing were more critical with higher RPM.  I am
talking 10k plus.

Also, What about squaring off the opening into the "chamber" ?  Would allow
for more
breathing and you might be able to get 2" pipes.  Tricky machining, and pay
atention to
flow seperation with the change from round to square.

tc

Don't know where you are getting rotors light enough to go to 10K
plus Todd.

Paul Lamar
 
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