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 Post subject: Doc, Hilborn bung dim's
PostPosted: Wed Oct 31, 2001 8:44 am 
Ok, here's what I found; Bung O.D.: .780" Height above outer surface of runner, approx.).100" Wall thickness; .310", (from top of bung to inside runner wall. Distance from intake mounting flange (gasket surface) to center of tapped hole; (approx.) 1.150" Again,original nozzle hole is 1/8"npt, perpendicular to runner.

I'm not too optimistic about the possibility of adding a second bung closer to the head flange, but it might be possible outboard of the original bung.

Description of runner; Round port of 1.80" on incoming air charge end, tapering to, and changing shape to rectangle port of 1.25"x1.40", over length of 4.79". Also has (horizontal) velocity "stack" length of 5.90".

Sorry, the digi-cam I have doesn't do well with close-ups. I'll see what I can do to get a few pics out to you. They might come from an address not known to you, but the subject line will tell you it's from me.

Roger

GTS225@aol.com


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PostPosted: Wed Oct 31, 2001 8:58 am 
Quote:
: Ok, here's what I found; Bung O.D.: .780"
: Height above outer surface of runner,
: approx.).100" Wall thickness;
: .310", (from top of bung to inside
: runner wall. Distance from intake mounting
: flange (gasket surface) to center of tapped
: hole; (approx.) 1.150" Again,original
: nozzle hole is 1/8"npt, perpendicular
: to runner.
: I'm not too optimistic about the possibility of
: adding a second bung closer to the head
: flange, but it might be possible outboard of
: the original bung.
:
: Description of runner; Round port of 1.80"
: on incoming air charge end, tapering to, and
: changing shape to rectangle port of
: 1.25"x1.40", over length of
: 4.79". Also has (horizontal) velocity
: "stack" length of 5.90".
:
: Sorry, the digi-cam I have doesn't do well with
: close-ups. I'll see what I can do to get a
: few pics out to you. They might come from an
: address not known to you, but the subject
: line will tell you it's from me.
: Roger


Thanks Roger,
The bung diameter is good, wall thickness is a little short for an EFI injector (1/2 inch is about right)
It is good to hear that there is some space between ths bung and mounting flange, gives us some room to work. (NOS fogger nozzle are pretty small)
DD


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