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Engine basics => Engine set up tips => Topic started by: Dennis Vander Kuur on February 10, 2009, 07:32:35 PM

Title: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Dennis Vander Kuur on February 10, 2009, 07:32:35 PM

Greetings,
Frequently the issue comes up about profile-mounted FOX 35 Stunt engines "burping" during outside maneuvers. Long ago someone came up with a generally proven fix for this. The remedy is the installation of a wooden plug in the engine's bypass passage. Several people have had questions about making/installing this bypass plug . Hopefully questions about the placement, dimensions, and material of construction will be answered by the attached drawing and photos. Remember the dimensions on the drawing are approximate - you need to carve and trial fit the plug to your engine.
DennisV

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Clint Ormosen on February 10, 2009, 08:06:41 PM

Very good description and pix, Dennis. I do it with JB Weld instead of a stick. Shape it with a Dremel tool.

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: john e. holliday on February 12, 2009, 05:40:10 AM

Thanks Dennis,  I just printed off a copy to put in my copy of Tom Morris' book on his building techniques.  The book also has jigs, tools and how to's.  Having fun,  DOC Holliday

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Phil Coopy on February 12, 2009, 07:56:45 AM

John, Dennis,

Probably nothing new but I discovered with one of my 35's that the position (front to back) in the bypass made a great deal of difference.  Mine worked best if it was positioned towards the front of the engine and not in the middle of the bypass.  Don't know why. ???

Phil

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: john e. holliday on February 12, 2009, 08:10:37 AM

This makes me think now of the spray bar position.  Especially the one with a single hole.  DOC Holliday

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: John KruziK on February 12, 2009, 05:21:39 PM

I've read about doing that but never realy understood, now I do thanks  John

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Chucky on February 12, 2009, 05:24:28 PM

Most reliable cure I've found for the Fox .35 burp is the OS .25 LA-S.  Come to the Dark Side, Jedi knight, and experience the full power of The Force!

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Clayton Berry on February 12, 2009, 06:40:56 PM

Now that, was funny.

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Ward Van Duzer on February 13, 2009, 08:41:13 AM

But they didn't make O.S. .25's in 1951...

W.

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Phil Coopy on February 13, 2009, 09:39:37 AM

Like replacing a Flathead V8 with 350 Chevvy....no class. n1

Phil

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: DanielGelinas on January 23, 2012, 10:24:50 AM

Hi Guys,

Just wondering how you fuelproof the wood in the Burp fix?

Thanks,

-Daniel

Title: Re: FOX Anti-Burp Bypass Plug Drawing and Photos
Post by: Paul Taylor on January 23, 2012, 12:30:57 PM

You don't.
It gets oil soaked.