Re: [ihc] anti-backfire valve

["T.R.E.Jr." <T_R_E_Jr@xxxxxxxxxxx>]

---FWIU it acts just like the power valve protector for Holley carburetors.
What it does AFAIK is allow a vent on the other end of the crankcase, from
the PCV valve. Basically, it completes a loop through the crankcase so it
can breathe rather than burp air now and again. If the crankcase does burp,
the screens inside the flame arrestor block the flame from making it to the
carb... or up through the power valve.

---Thank you,
-T.R.E.Jr.
-`73 Scout II (StoneThrower)
-`51 Farmall H (Heinz)
-`49 IH fridge (presently unnamed and in need of a compressor)
-`49 Plymouth Special Deluxe 4-door Sedan (Papapalooza)


----- Original Message ----- 
From: "Mac @ TRIAD" <mac@domain.elided>
To: "John Stricker" <jstricke@domain.elided>; "IHC Digest"
<ihc-digest@domain.elided>
Sent: Tuesday, October 28, 2003 8:38 AM
Subject: RE: [ihc] anti-backfire valve


> ## >> As for the "flame arrester", I call that an anti-backfire
> ## >> valve.  Yes, it
> ## >> has that hose to the air cleaner.  That's to keep a backfire
> ## >> from possibly
> ## >> igniting the air/oil mix in a valve cover.  All of the V8
> ## >> Scouts I've seen
> ## >> have that.
>
> this raises an interesting question for me.  my BD220 and my first two
304s
> all had the "flame arrestor" or "anti-backfire valve" installed...  it was
> on the top of the valve cover for the BD, and in the top of the oil filler
> tube for the 304s.  all of them had a hose to the air cleaner.  my
question
> is this:  if that's to keep the backfire from igniting the oil/air mixture
> inside a valve cover (crankcase in the case of my 304s), then what's to
keep
> a backfire from igniting the air cleaner itself?  all three of these
engines
> were oil bath air cleaner equipped.  isn't it pretty nearly the same
air/oil
> mixture in one of these air cleaners?
>
> --Mac
>
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> Krystof "Mac" MacBryghde
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