From: larry@rock.psl.nmsu.edu (Evil Engineer doin' it the Cowboy Way)
Newsgroups: rec.models.rc
Subject: Re: Engine problems
Date: 5 Jan 93 20:26:42 GMT
	<LARRY.93Jan4085054@peak.psl.nmsu.edu>
	<wwebster-050193075910@47.220.4.39>
Followup-To: rec.models.rc
Organization: New Mexico State University, MetaPhysical Science Laboratory

>>>>> On Tue, 5 Jan 1993 13:06:38 GMT, wwebster@bnr.ca (Bill Webster)
Bill> said: Okay. I'll bite.  What is a "stuffer" backplate and
Bill> where do you purchase them?  I expect it's a new backplate
Bill> to decrease crankcase volume, thus increase crankcase
Bill> pressure.

As far as I understand, that is precisely what it is. My information came
from _Round & Round_, the Tulsa Glue Dobber's newsletter. Apparently there
is also a special hemi-head version of the venerable Fox .35 available now
too. (It must be custom machined..)

The fellow mentioned in R&R is Brian Holzwarth of Cedar Knolls, New
Jersey. He and his brother Carl own a business that deals in model
airplane stuff. They can be reached at:

	C.E.H. Products, Inc.
	24B Mercer St.
	Dover, NJ 07801
	Tel. 201-328-3545
	Fax. 201-328-4292

Bill> And, where do you get the pointed needle valve which still
Bill> fits the original Fox stunt spray-bar?

That is a mystery to me. They seem to talk about the tapered NV like it
uses the stock spray bar, but this might not be the case.

Bill> I've always found the Fox flattened needle valve works fine
Bill> as long as it never gets bent.  I cut the needle valve short
Bill> and put a 90 degree bend in it.  This way it avoids meeting
Bill> terra firma.  Besides, it's the cheapest spray bar assembly
Bill> you can buy.  But, I do wish the original Super Tiger
Bill> assembly was still available.  The one from Kustom Kraftsman
Bill> is okay but very expensive and you have to use his needle
Bill> valves (also expensive).

Cheap, plus available. The real problems we had with them I believe were due
to air leakage around the hole through the engine case. I've seen more
than one Fox .35 that wouldn't start and run without fiddling with the NV
magically "fixed" with a short section of fuel line jammed on the spraybar
assembly to seal that hole. I too doubt if the flattened NV is really the
problem, although I suspect the tapered NV has a finer adjustment range.

I personally like the OS FP needle valves, with the spring and knob
removed. They are fairly cheap ($5 - $6), available, and consistent
quality. I had bad luck on the KK assembly on a Dixon-modified OS-40FPS 
once and have never messed with one since, although they appear to be of
fine quality. (They also require drilling the case, which ruins it for
smaller diameter NVs..)

Bill>    Bill Webster (WWEBSTER@BNR.CA)
L.
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Disclaimer: Opinions expressed here are CORRECT, mine, and not PSLs or NMSUs..
Oh sure, we could do it the _easy_ way. But it just wouldn't be the COWBOY WAY.