Hilborn injected 65 Belvedere

[Blue]

Well, I found the old B&W article. It was actually Pete Jackson of gear drive fame running one of his own circle track set up's on his Falcon shop truck. Having read through it I now understand a little better the problems with using this kind of fuel injection on the street.

It is a very simple system, and that lack of sophistication is it's downfall. It is designed to work at full throttle and that's it, there is no idle circuit of any kind. It use's a barrel valve (like the old top fuel cars did) that is basically just a switch in the fuel bypass line, you have almost total bypass to the injectors or you don't, there is no gradual enrichment. I think the pill restricts the bypass line to tune the full throttle mixture. There is no way to adjust the mixture at any other point as far as I can see. Without a more sophisticated method of controlling the mixture, any sort of fuel economy is impossible to achieve, it will only be correct at wide open throttle.

That's what little I have managed to learn so far, I'm not claiming to be some kind of expert or to have the full story.

[Dave-R]

Yeah that is how they work normally.
The article I half-remember had something that allowed it to run on the street by the use of some sort of valve maybe opening with the throttles or accelerator?
I am pretty sure it was a mechanical system of some sort and not electronic or anything. It stuck in my head because I remember thinking it would be good to remember that if I ever wanted to run injector stacks on the street.

Or maybe I just dreamed the whole thing?

Maybe one day I will go through the thousands of magazines in the loft and find it.

[Blue]

No you remembered right, Pete Jackson had the barrel valve connected to a choke cable, in conjunction with a crude mixture meter he could lean it off a bit at freeway speeds to get some kind of economy. Did nothing for the idle though.

[Dave-R]

Adams a plumber. Right up his street this.

[Jeff]

Why does the mousetrap game keep poppoing up in my head when I read about this? Seriously cool looking though!

[Jon Connolly]

Blue / Dave

That is pretty much how it works. There are 2 things that control the fuel flow; the injector nozzles and the main jet ( pill ) in the return line.

Here`s what Hilborn say

http://www.hilborninjection.com/tech_mech_overview.asp

I`m reasonably happy with the way it`s running but will see at the weekend.

[Dave999]

sounds like a massive version of the wal phillips motor bike injector. they are gravity fed mind

basically a fat alloy pipe with a butterfly and a hole in the side for the fuel pipe

the pipe was slash cut and pointed vaguely upwards its bore was important...vague nod to venturi effect in the throttle body fuel pipe was at the narrow bit

switch on petrol and start it fast. fuel consumption based on how fast the fuel flows out the end of the pipe
i.e you could use a tank in 1/4 of an hour without even starting the bike.

maybe Mr Wal Mr Phillips and Mr Hillborn were all in the same class at school.

i can picture them all shouting Bruuuumm bruuuuuuuuum very loudly and laughing


Dave

[Blue]

Well I tell you what, the ol' gal might drink like a fish but it didn't miss a beat flying down the track! The sun was on the boards so I couldn't make out the time.

[the dodge]

im pretty sure this is one of the later runs

[Jon Connolly]

Ran 11.778 @ 112.53 mph with a very sleepy r/t of 0.651

So has potential to run low 11`s with some practice

Good crack to drive but does not like idling at low revs

[Pete]

Need to fix that leak as well Jon

Well done on its first time out

[Jon Connolly]

Thanks Pete

Yeah I`m on that, new hoses all round

[Jon Connolly]

Here`s a short video clip with Brian`s 64 Dart

[the dodge]

quality clip, looks a cool car

[NaughtyAlan]

Proper nostalgia Love it