rash12
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| posted on 11/10/11 at 11:24 AM |
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bike carb manifold
im in the process of manufacturing a manifold for a set of bike carbs for my pinto and was after some advice,
what size vacuum pipe should i use for the four take offs from each leg of the manifold, and what sort of size vacuum chamber will i need before the
single vacuum pipe to the dizzy ??
thanks in advance
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deezee
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| posted on 11/10/11 at 11:49 AM |
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About 3mm ID will be fine for your vacuum take off. A reasonable sized vacuum reservoir / chamber would be around 2" diameter and 4 inches
long.
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RAYLEE29
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| posted on 11/10/11 at 12:03 PM |
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hi, is it really necessary to have a chamber and that seems excessive to me just for the vac advance on the distributor.
Ray
build diary1
http://picasaweb.google.com/raylee290/RoadsterPics#
build diary2
http://picasaweb.google.com/raylee290/KITCARPICS?authkey=Gv1sRgCI2AouyYgpuQmAE#
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blakep82
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| posted on 11/10/11 at 12:15 PM |
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quote:
Originally posted by RAYLEE29
hi, is it really necessary to have a chamber and that seems excessive to me just for the vac advance on the distributor.
Ray
yeah, it helps to smooth out the vacuum from each runner on the manifold. if you just took 1, it would pulsate, so you need all 4 really, they still
pulse though, so it helps smooth the pulses out to give a nice steady vacuum
________________________
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RAYLEE29
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| posted on 11/10/11 at 12:34 PM |
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ta, but does the plenum really need to be that big? 2"od x 4" long? for mine i was planning on running the four pipes tee'd together
then to the vac diaphragm.
maybe a plenum made from a 1/2" tube slung under the runners would be better and neater?
Ray
build diary1
http://picasaweb.google.com/raylee290/RoadsterPics#
build diary2
http://picasaweb.google.com/raylee290/KITCARPICS?authkey=Gv1sRgCI2AouyYgpuQmAE#
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snapper
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| posted on 11/10/11 at 03:34 PM |
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I've got a plenum made from 10pm pipe 100mm long, seems to work on my Megajolt ok
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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jacko
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| posted on 11/10/11 at 04:36 PM |
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A mate of mine made one out of 22mm copper pipe about 70mm long and caped the ends with pipe ends, then soldered 4 tubes in one end and one pipe in
the other ,
This worked very well
Jacko
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rash12
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| posted on 12/10/11 at 06:54 AM |
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manifold
thanks jacko i had a similar idea in mind i was going to do the same with a shorter piece of 42 mm copper tube
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