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Great Planes, TopFlite, Duraplane, US Aircore Support from Bill Baxter for Great Planes distributed brands "Great Planes, TopFlite, DynaFlite, Duraplane & US Aircore"

Header TOPQ7925/6

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Old 02-21-2012, 06:55 AM
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edbu1
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Default Header TOPQ7925/6

Bax: I've been told that this item is no longer available. Is this correct? I also understand that the TOPQ7925 and TOPQ7926 will both work for the G series Suepertigre 75. Is this correct? If discontinued, any replacment headers available?

Ed
Old 02-22-2012, 07:27 AM
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Bax
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Default RE: Header TOPQ7925/6

They're different sizes and won't work for both engines. The O.S. is 43.8 mm between the mounting holes and the ST is 47 mm between the mounting holes.
Old 02-22-2012, 07:31 AM
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edbu1
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Default RE: Header TOPQ7925/6

Bax: My understanding is that TOPQ 7925 and 7926 are both for Supertigre engines. The 7920 is for OS engines. I have a ST G-75 engine.
Are the 7925 and 7926 both discontinued with no replacment by Top Flite?
Old 02-23-2012, 04:53 AM
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edbu1
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Default RE: Header TOPQ7925/6

With further investigation, it appears that the 7925 header is made for the S series of Supertigre engines, which means that the mounting bolts pass through the header and screw into the engine crankcase. The 7926 header is made for the G series of Supertigre engines, which means that the mounting bolts pass through the engine crankcase and screw into the header. I believe that both have the same, proper dimension from mounting bolt to mounting bolt. So I should be able to use the 7925 on my G series of Supertigre engine. Using the 7925 on the G series will require longer bolts that will pass through the header and be held on with locknuts.
Old 02-23-2012, 07:43 AM
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Bax
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Default RE: Header TOPQ7925/6

I made a bad lookup. I compared the OS header to the ST header. Please note that the ST headers are discontinued and no longer available.

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