The Herbert-Steen Streamliner had problems with the fuel being pushed
out of the nozzle air bleeds, that is why Bill Hurt was discussing this
problem with me and advised us to plug the bleeds. He said that these
air bleeds are just for a better idle, no affect on the high speed
functions.
Tom, Redding CA, #216 D/CC
ardunbill@webtv.net wrote:
>
> Group, some interesting subtleties have been brought out here. Tom
> Bryant pointed out that a 'big' scoop can actually create a positive
> pressure in the throttle bodies at high speed, pushing fuel back out of
> the "A" type nozzles, a small amount but enough to burn the hoses if it
> catches fire. This sounds like it could be serious, certainly is not
> desirable. Could it be overcome by using the non-"A" type nozzles?
>
> Perhaps someone would tell me why the nozzles need "idle air bleeds" on
> 'em anyhow, isn't that just another way for air to get into the engine
> in the idling mode, in addition to the air passing the throttle plates?
> Or is it to help vaporize the fuel leaving the nozzle by mixing it with
> air in the nozzle?
>
> John Beckett had previously told me he had trouble at Bonneville burning
> rear pistons on his SBC because his air scoop was apparently biasing the
> air flow to the rear Hilborn throttle bodies, overloading them, and
> leaning out the mixture, which overheated the pistons. John then went
> to carburetors, and went just as fast, and has a number of records to
> his credit.
>
> It begins to look like a 'good' tuner can get the mechanical fuel
> injection to work fairly well, and get good performance, and the
> 'supergood' tuner who can really understand and manage the equipment, to
> get optimum mixture in all the cylinders, gets the best performance.
>
> Since I am a 'hardhead', and just always liked the 'looks' of the
> Hilborn, I'm going to try hard to learn to be a 'good' tuner.
>
> That reminds me of something one of the local judges on the Circuit
> Court here told me years ago when I ran into him socially. "You know
> Bill, most of the people that come into my Court are either nuts or
> hardheads." Cheers from ArdunBill in the Great Dismal Swamp,
> Chesapeake, VA.
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