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  • June 19, 2025, 02:45:48 PM

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Author Topic: Anybody know where I can get a venturi for a O.S. .25FSR?  (Read 1637 times)

Offline andy borgogna

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Anybody know where I can get a venturi for a O.S. .25FSR?
« on: March 19, 2016, 10:44:56 PM »
I need a control line venturi for an O.S. 25 FSR, any help would be greatly appreciated.
Andy

Offline Dan Berry

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #1 on: March 19, 2016, 11:20:31 PM »
I would ask at RSM if the LA25 venture would work.

Offline John Craig

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #2 on: March 20, 2016, 04:40:16 AM »
http://stunthanger.com/smf/lee-machine-shop/great-news!-website-now-open!/

This is where I get mine. I have FSRs with 2 different size throats in the crankcase for the venturi.  I  have used the LA-25 venturi but I adjust the case to get the 20-25 needle valve to center. 10-4 APC cut to 9.5=4

Offline Akihiro Danjo

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #3 on: March 20, 2016, 10:18:03 AM »
OS venturi 20-25 FP-S, stock # 22312000, is suitable for FSR25 with OS nva 20-25 FP-S, stock # 22311000,.
The venturi is about 6.5-6.6mm ID and the nva is about 3.5mm OD.
I prefer Nelson nva, about 4.0mmOD, so I use 6.8-6.9mm venturi on my FSR25 for Doodlebug440.
It runs very well.
Aki

Offline Norm Furutani

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #4 on: March 20, 2016, 10:42:36 AM »
Andy-
Hulan Mathies, one of the Friday, Whittier Narrows gang can make you a venturi. I don't have his current ph# but I can get it if you're interested.

Norm Furutani

Offline andy borgogna

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #5 on: March 20, 2016, 10:59:20 AM »
Thanks everybody.  Norm if you can get the number that would be great.  At VSC I made a quick discovery, my electric Ringmaster was too heavy for the 3000' altitude.  So I want to build a new non-take apart version and build it as light as possible.  Switch from electric to glow with the O.S. .25.  It was funny the plane I was worried about the 60 powered Humongous performed very well at altitude, but the Ringmaster just about fell out of the sky in the vertical eight.  Even after I turned up the wick on the Ringmaster, just not enough power.
Andy

Offline Bill Little

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #6 on: March 20, 2016, 03:38:25 PM »
Hi Andy!

I am sure you can get a really nice venturi from Jim Lee, in any size you want for the .25FSR.  Also pretty sure Randy can set you up with one!

And I am sure the .25FSR will work great on the Ringmaster!

Good luck!
Bill
Big Bear <><

Aberdeen, NC

James Hylton Motorsports/NASCAR/ARCA

AMA 95351 (got one of my old numbers back! ;D )

Trying to get by

Offline Norm Furutani

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Re: Anybody know where I can get a venturi for a O.S. .25FSR?
« Reply #7 on: March 20, 2016, 06:48:49 PM »
Email sent

Norm

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