Paul,
when building headers for a P port what diameter of tubing should be
used?  I want to use the 2" for intake runners should the headers be
2"?  When should the merge 16" ?  I was going to use the 2" 321 from
burns.  Does anyone sell the flanges for headers ( Mazdatrix)? Thanks
for any help

Joe Berki
Limo EZ

Two is good but kind of bulky. 1.75" is probably more practical.
Racing Beat has flanges for 2nd and third gen engines.
32 inches in the optimum merge lenght for about 6500 RPM.

Paul Lamar ...No rotor no motor.

Thanks,
With a 2.85 to one PSRU should the rpm be raised more than 6500rpm?  Has the
slide throttle design drawing changed? I have rev 10 I think. Is'nt the
design up to rev11?

Thanks

Joe Berki

Limo EZ

OK for 7500 RPM the header pipes should be around 27 inches.

The drawing is the same for rev 10 and rev 11. Only the thickness
of the Teflon and spacer was increased from .25 inch to .375 inch
to beef up the throttle cable connection to the Teflon.

Having said that I will be working on rev 12 in the next few
days. I will lengthen the side plates on one end to act as a
support for the throttle cable anchor.


Paul Lamar ...No rotor no motor.

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