OS 91FX

[David Gundling]

Message text written by INTERNET:discussion at nsrca.org
>Only have rpm with tuned pipe. Added 1 extra headshim (gasket), Magnum #1,
APC 15x8 @ alittle above 10K, Not 100% tuned. Perry Vp-30.  I bought it to
use instead of YS 91. 91FX should do very similar.

Without a tuned pipe, 91FX will not overrun the YS 91AC/FZ.

Ihncheol Park<

Ihncheol,

Thanks for the reply. It would appear that the cost of an OS91FX set up to
put out the power of a
YS91 is in the same class as the YS91. With pipe, header, and pump, haven't
 you exceeded $350?
(Assuming that a person buys the engine new.)

Dave

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