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08-24-2011 | 07:45 AM

#21

Sport_Pilot

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From: Acworth, GA

RE: Magnum/ASP 108

Quote:

ORIGINAL: Ed_Moorman

I have both the Mag .91XLS and the Mag 1.08XL. On a smaller prop the .91 will out turn the 1.08. It has been my experience with 2 1.08s that it is not a good high rpm engine.

I still recommend a 15-8 or 16-6 for it. It needs some big lumber on the front.

The ASP engines, made for the European market, may have a higher compression than the Magnums, made for US use. The higher compression works better with a lower nitro fuel, 0% or 5%. I live in Florida and use 10% all the time with no ill effects.

I have the Red Head .91 and it will only run on 10% in the winter and cooler spring weather. But has more power on 5% even then. It will detonate and overheat. It was bought from Indy R/C not an Europeanversion. I think the later grey head versions tolerate higher nitro.

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