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george.mueller(at)aurora.
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 Posted: Thu Feb 26, 2009 7:23 am Post subject: "Xtra pistons" |
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I am anticipating putting my 701 on floats. Originally I was going to sell my 80hp 912UL and buy the 912ULS 100hp. However I have come across a guy who sells high compression forged pistons (called Xtra) for the 912UL that adds 10-15 horsepower. The cost is about $850 for the pistons. This seems to be a more cost effective way to get the extra horsepower for floats (although I have heard from guys with the 80 hp Rotax on floats and they say it really is OK unless you are flying out of really small ponds). Does anyone have any experience with the Xtra pistons? The Xtra guy says he has sold 800 sets of these pistons worldwide. Is there any downside other than voiding the rotax warranty?
George in Milwaukee
N701GM 60 hour flying
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graeme(at)coletoolcentre.
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| Posted: Thu Feb 26, 2009 2:19 pm Post subject: "Xtra pistons" |
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I have a set of 912xtra pistons there was a definate incresase in power
you change the plugs you use std rotax rings expensive.
if you can get them try http://www.experimentalfuelinjection.com/wst_page9.php
they come with rings to suit about the same price as 912xtra but may notice a tiny bit more power than912xtra
Graemecns
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lvuman(at)gmail.com
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| Posted: Thu Feb 26, 2009 2:32 pm Post subject: "Xtra pistons" |
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Don't know if auto gas is important to you or not but the higher compression engine might eliminate that option. Something to consider.
On Thu, Feb 26, 2009 at 8:18 AM, <george.mueller(at)aurora.org (george.mueller(at)aurora.org)> wrote:
[quote]
I am anticipating putting my 701 on floats. Originally I was going to sell my 80hp 912UL and buy the 912ULS 100hp. However I have come across a guy who sells high compression forged pistons (called Xtra) for the 912UL that adds 10-15 horsepower. The cost is about $850 for the pistons. This seems to be a more cost effective way to get the extra horsepower for floats (although I have heard from guys with the 80 hp Rotax on floats and they say it really is OK unless you are flying out of really small ponds). Does anyone have any experience with the Xtra pistons? The Xtra guy says he has sold 800 sets of these pistons worldwide. Is there any downside other than voiding the rotax warranty?
George in Milwaukee
N701GM 60 hour flying
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graeme(at)coletoolcentre.
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| Posted: Thu Feb 26, 2009 5:09 pm Post subject: "Xtra pistons" |
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Ref High compression 912xtra pistons
I have to use Premium unleaded
Graemecns
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jetboy
Joined: 22 Jul 2006
Posts: 233
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| Posted: Thu Feb 26, 2009 11:01 pm Post subject: Re: |
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Are you aware its possible to turbocharge the 80hp 912 - making it a similar engine to the 914 - the makers of the Xenos gyroplanes do this for some of their models, claiming 122hp for modest cost.
Obviously you have to dial in your own tradeoff of power vs. reliability here, and you wont get the sophistication of the 914 TCU or an over the counter bolt on solution, its my preferred powerup path for the 912UL.
Ralph
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mcjon77
Joined: 17 May 2008
Posts: 55
Location: Chicago
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