> > Hi Paul and All,
      > > Couple of Photos for Your Up-Date,
      > > Have changed the pulleys to install the 36-1 tooth Edis wheel,
      > > Got things taged together, rough fit for vibration test run.
      > > Radiator is 10 x 12 x 1.25 Avid Flyer part.
      > > Couple of questions,
      > >
      > > 1. Whats the deal in the exhaust port,
      > > the small down angle tube retained by roll pin?
      > > 2. Do I stay with stock 12A timing using Edis-4 Setup.
      > > Leading 0 TDC
      > > Trailing 20 ATDC
      > > Best Regards
      > > Rolland
      >
      > Rolland,
      > What sort of carb is that - it looks like an old Posa.
      > I like your engine brackets and do you have a damper on that PSRU.
      > What sort of PSRU is that?
      > George (down under)
      >
      >
      > George,
      > Engine is from E-Bay No history/Info.
      > See photo's of HD PSRU has no damper.
      > Carb is POSA also have Mikuni 42mm.
      > Question is dynamic balance, I need to do test run!
      > Rolland (Philippines)
      > Kitfoxes RP-S135/S2804



Would appreciate all info I can get on single rotor balancing!
Exhaust port small tube with roll pin, is 13b the same?
How has this been closed?
Rolland (Philippines)
Kitfoxes RP-S135/S2804


Exhaust port is probably the same as a 13B.

Here is the mathematical correct way to balance the single rotor.
The PSRU you have is based on a six pinion  modified Ford C6 planetary
transmission part from Performance Automatic. Later on
Ford themselves starting manufacturing a six pinion planetary that
is interchangeably with the parts you have.

-----------------------------------

Opss wrong chart. Here is the better one.


Paul Lamar ...No rotor no motor.

Rolland,
I'm just looking at my notes for the carb, Mikuni recommends a 48mm ( 42mm
Venturi) for anything over 120hp. If you have a 42mm Mikuni it may be only a
36mm Venturi, which may be restrictive. I don't think the Posa has a
Venturi.

I don't know what HP your looking for, but with a 44mm PP inlet you should
get at least 115 hp - all things being equal.

Your max flow rate will be 173.6 cfm at 7,500rpm at 6,000 rpm it will be
138.8 cfm, those flow rates suggest a 44mm inlet ( 42mm would be OK)  with
inlet velocity of 121.5mph ( for the 44mm) and 133.32mph (for the 42mm).

Please advise of your inlet size and size of the Posa!

What Hp is your goal ?
George (down under)


You cannot makes statements like this unless you present a lot more information.
The amount of air an engine pumps at any given RPM is going to be a function of the
length and configuration of the intake runners.

Do you have any dyno curves on these numbers?
Also pictures  or drawings of the manifold and carburetors used?

Paul Lamar ...No rotor no motor.

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