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Old 12-07-2002 | 02:56 PM
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rsieminski
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From: Sarasota, FL
Default GMS w/pipe
You will gain 1500 to 2500 rpm with a Mac's header and pipe on the .47. Mine will turn:
9x10 APC 13.65K
9x7 APC 16.3K
10x8 MA 14.5K
12.25x3.75 APC 12.4K (as fast as people are getting with their .50sx's)
11x5 MA 16.1K
14x6 MA 7K
9x7 APC 17K
The 9" props would be good for something 3# or less, otherwise go to a 10x8. Its hard to get it under 3#. Maybe get a Mag .91 with a 5# plane. The .91 only weighs ~8oz more.
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