Paul,
         Have attached various photos of throttle body and runners.
Measurements are, butterfly to housing wall  5 inches, butterfly to plenum
approx. 15 inches.  The ruler shows where I can shorten the runners to if
necessary, which can be as short as 14 inches total.  regardless will run
the motor as is to see what will happen, as the work is already done and I
am keen to just get flying and worry about further mods after that. What do
you think re runner length?  With all the bits cut off the slide throttle,
it is now a proposition to send it back to you for investigation which I
will do when I get the time.

Neil.


Wow! impressive. Is that a custom throttle body?

Since the throttle plates are close to the p-ports it should idle
pretty good.

Hard to say where the torque peak is. Has anybody in Oz dynoed
that TB?

You will have plenty of power no matter what. I would not bother
to shorten
the runners.

You are going to be very impressed with the take off performance.

Are you using Tracy's computer. You may have to retune to match
the new
manifold and TB.

If you don;t mind send me the slide throttle by boat. No rush.


Paul Lamar

Paul,
        Yes the throttle body  is manufactured in Melb Aust and was
supplied by Rohan Ambrose of Xtreme rotaries.  Only trouble with it was the
centres of the TB is 150 mm and the centres of the P ports is 160mm making a
10mm difference. (slightly more than 3/8 inch).  To get the bodies to line
up I had to make an adaptor to go from 150mm to 160mm.  The thickness of the
adaptor plate is 1. 1/4 inch and the angle of the hole to be drilled is
9.013 degrees!  Believe me my bum cheeks were extremely tight when it came
out of the mill hoping that the calculation was correct and the hole at the
bottom actually finished in the centre and not out one side.   I still have
to pinch myself to realise that bit was spot on.  Yes I have tracy's
computer and will spend a further few hours tuning the monster.  At this
rate I will have 3 oil changes on the motor before I even get off the
ground!  Rohan may have dynoed this TB, so will try and get an answer from
him.   Neil.


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