OS 91FX

[Ihncheol Park]

Dave,

I think I didn't make it clear when I said YS 91.  I meant the YS 91AC/FZ.
For an OS 91FX or OS 91SX-H (now discontinued, but 91SX C-Spec parts can be
used).  I believe you can get a new 91SX-H at a lower price around $200.
Macs header: $25. (standard side header)
Karl Mueller's header: $45. (a beautiful custom header)
Perry pump VP-30: $25.
Tuned pipe: depending on what kind of pipe you buy $40 ~ $$$.

I am sure you can get by under $300.00

If you opt for YS 91ST-4, it will be above $400.  I would go with YS 110 for
this case.
There should be people still having brand new 91SX-H for sale.

As Matt K. replied with Nat Penton's use of OS 91 with 17x10, 16x10 etc
props, I am planning to use larger prop that 15x8.  I just didn't have time
to try yet.

Ihncheol Park


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of David Gundling
Sent: Saturday, October 25, 2003 6:39 AM
To: INTERNET:discussion at nsrca.org
Subject: RE: OS 91FX


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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