Confused but excited.
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| posted on 29/12/09 at 03:39 PM |
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Making a manifold ?
Numpty question but..........Is there any technical reason - neglecting any ancilliary equipment clearance issues - why injectors cannot be fitted on
the underside of an inlet manifold, instead of on top?
[Edited on 29/12/09 by Confused but excited.]
Tell them about the bent treacle edges!
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BenB
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| posted on 29/12/09 at 03:42 PM |
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As long as you're spraying into the air stream at the right angle, no 
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SPYDER
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| posted on 29/12/09 at 04:30 PM |
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I had similar thoughts regarding the Fireblade 929 installation in our Phoenix.
We wanted to turn the standard airbox upside down but the airbox / trumpet/ throttle body interface suggested that we turn the bodies upside down as
well.
This, of course, means that the injectors point upwards, as per your post.
I can report that the engine starts, ticks over, and runs nicely to the redline through the gears and seems to have suffered no ill effects from the
exercise.
Geoff.
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v8kid
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| posted on 29/12/09 at 05:25 PM |
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The general idea is that they spray onto the back of the inlet valve, not the side walls, so geometry permitting no reason why not.
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boggle
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| posted on 29/12/09 at 05:51 PM |
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i would have thought it was just easyer to get access to them, for testing and removel....
just because you are a character, doesnt mean you have character....
for all your bespoke parts, ali welding, waterjet, laser, folding, turning, milling, composite work, spraying, anodising and cad drawing....
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Confused but excited.
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| posted on 29/12/09 at 07:00 PM |
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The reason, is that I want to make an inlet manifold with the injectors underneath. This is to basically hide them from view, so that the twin 40
carbs that I am using to make throttle bodies, will look more like a carb set up, to go with the 'retro' look that I am after for my
build.
Purely cosmetic and yes it will make more work maintenance wise, I know, but don't care about that.
I couldn't think of any reason it wouldn't work but wanted confirmation of you guys who are much more knowlegeable on this subject that
me.
Cheers for the input guys.
Excellent comments as usual.
Much appreciated.
Just got to make a mock-up/pattern now and see if it will all fit. 
[Edited on 29/12/09 by Confused but excited.]
Tell them about the bent treacle edges!
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MakeEverything
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| posted on 29/12/09 at 07:07 PM |
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Only drawback i can think of, is crap getting into the injector and blocking it over time???
Other than that, Fuel is Fuel.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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Confused but excited.
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| posted on 29/12/09 at 07:21 PM |
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Would have thought that they would be self cleaning, at least as far as any muck coming down the inlet tract.
Tell them about the bent treacle edges!
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mark chandler
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| posted on 29/12/09 at 10:01 PM |
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Mines upside down as well to keep things low under the bonnet, only issue has been a little rubbish collecting in the pressure regulator which I could
easily blow out, would have stuffed the injectors so I recon its the better way now on the basis they are top side for easier servicing.
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Confused but excited.
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| posted on 30/12/09 at 01:29 PM |
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Mark, don't quite follow that, but there again not called 'Confused' for nothing. 
Surely crap in the regulator would be caused buy a dodgy fuel filter. So the position of the injectors is irrelevant to that.
Or have I missed something?
Tell them about the bent treacle edges!
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Angel Acevedo
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| posted on 30/12/09 at 02:04 PM |
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regulator needs a vent, so dirt may lead to malfunction/failure?
Beware of what you wish.. for it may come true....
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