PeterW
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| posted on 15/1/07 at 12:36 PM |
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Bike Carb Manifold - why can't you do this...
OK
Chatting over the weekend about this never ending issue of how to match engine spacings to carb spacings, and get the right angles etc.
Once conversation was why cant you use silicone hoses and a frame to hold the carbs...? The idea would be a stub manifold at the engine end, and short
silicone hoses to the carbs, which would be held by a bracket onto the engine manifold, pretty much how a lot of carbs are held onto bikes these
days.
I couldn't come up with a good reason as to why not, so what have I missed...?
Cheers
Pete
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ned
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| posted on 15/1/07 at 12:42 PM |
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I believe the way you have described is how it should be done, so as to stop the fuel frothing with the absence of misab plates as per a
weber/dellorto style manifold.
Ned.
beware, I've got yellow skin
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Catpuss
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| posted on 15/1/07 at 01:29 PM |
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Bike rubbers seem to work on practically any Bike I have seen. Keeping the carbs from vibrating loose is the main thing. On a bike they are held in by
the strength of the rubbers between the enging<->carbs<->Air box.
One thing I would watch for with say very smooth silicone hoses would be the fuel condensing out of the air flow. Hence when porting a head you polish
the intakes to a shine then sand blast them to dull them off after. Not sure if it would be much of a problem in reality but may be something to
consider.
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MikeR
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| posted on 15/1/07 at 03:37 PM |
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also make sure you get fuel proof silicone.
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Surrey Dave
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| posted on 15/1/07 at 05:24 PM |
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Yeah but!! , at each end where the stubs and carbs end you would have a very ungroovy step in the inlet tract.
Supposin you could get a tight fitting inner hose to fill between the steps?
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PeterW
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| posted on 16/1/07 at 10:41 AM |
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quote:
Originally posted by Surrey Dave
Yeah but!! , at each end where the stubs and carbs end you would have a very ungroovy step in the inlet tract.
Supposin you could get a tight fitting inner hose to fill between the steps?
So what happens on a bike...?? They use rubber connector thingys to the inlets so there must be a step there too...
Other alternative is one piece rubber runners all the way to the head, and secure using ally plates over the top...
Hmmmm
Pete
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Surrey Dave
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| posted on 16/1/07 at 11:00 AM |
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No
There is no step because the rubber carb mounts have a step in them just where the carb stub ends to give a smooth transition.
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