Not thought of that!
cheers
Chris
I'm about to source some materials to build a manifold for my ZX12R TB's. They are going on to the Zetec E that I'm in the process of
installing.
The outside neck of the TB's is 57-8mm but the size of the aperture is a bit less. I'm thinking that if I get tube with an OD of 57mm &
maybe 2-3mm wall the flow throught the tube maybe a bit slow down to the head. The next logical size down is 50mm (metal stock still seems to be tied
to imperial!). With 50mm tube I could turn up some adapter to slip over the end of the tube to use 57mm connecting samco etc.
Anyone else making up manifold care shed some light on what they have used?
Neat solution!
Not thought of that!
cheers
Chris
quote:
Originally posted by CaLviNx
why not just place some suitably sized "O" rings as seals over the bodies and bore some ali tubes that are slightly larger than the throttle bodies and use a mechanical restraint at either end to stop the bodies from popping out of the manifold tubes.
they are throttle bodies though not carbs - that is how i have mounted mine.
these guys have all sorts of alloy tube's in other sizes that metric.
I don't know who gave me the link over here nut THANX.
http://www.aircraftspruce.com
I have just ordered some stuff.
grtz Thomas
What is the spec of your engine and the diameter at the engine end of the TBs? Those TBs sound a little on the large side for a zetec....
quote:
Originally posted by SeaBass
The outside neck of the TB's is 57-8mm but the size of the aperture is a bit less.
As I attempted to explain. 58mm in NOT the internal and much quoted diameter of the TB's. It is the external mounting flange
diameter. They will be fine for the application.
My question relates to intake manifold runner internal diameters and there effect on charge speed. Is this even important??
Cheers
If you go from a 58mm bore in the manifold to a smaller bore on the cylinder head the flow will speed up as it enters the head.
David
OD of the tube will be 58mm - 2xwall. I'm thinking quite a thick wall so prolly down at about 52mm ID. This will be squashed to an oval shape at
the face of the head to suit the Zetec's ports.
TBH I haven't really learnt anything from this thread guys sorry!
Cheers
[Edited on 15/3/07 by SeaBass]
Well what is the ID of the TBs at the engine end. The same diameter would probably be a good start point.
Without knowing the ID at the TB how can anyone know what the effect on the charge speed will be?
quote:
Originally posted by andyharding
Because the carbs would then be solid mounted which is incorrect. The carbs must be rubber mounted.
Carbs need to be flexibly mounted otherwise the fuel in the float chambers froths up. Doesnt matter with ITBs though.
David
aha, I thought so - but does it really make that much difference?
on a bike, the engine has hardly any movement but a car on its usual rubbers does so I am disbeleieving that it is gonna make a difference. 
be interesting to see if anyone has tried both methods of mounting (ooh err!) 
[Edited on 14/3/07 by 02GF74]
quote:
Originally posted by CaLviNx
OK I'M NOT HAVING A PERSONAL POP AT YOU.. BUT
If you had initially asked the questions you asked LATER in the thread people might have managed to help you, the old adage works here "crap question = crap answer"
quote:
Originally posted by chriscook
Without knowing the ID at the TB how can anyone know what the effect on the charge speed will be?
quote:
Originally posted by SeaBass
quote:
Originally posted by chriscook
Without knowing the ID at the TB how can anyone know what the effect on the charge speed will be?
Easily - because there will be established theory on the subject. I'm not looking for an exact flow in m/s because that would be useless...
Im using throttle bodys with an outside diameter of 44mm and bore of 38mm.I found some 50mm od alloy scaffold pipe and am going to bore the ends out
to allow the Tbs to be pushed in against an O ring and then arrange a clamp to hold them in place.I have tried a few ways of fitting to the manbifold
plate but have decided that the best and easiest way is to just squash the tube oval to match as well as possible and then am going to match the
manifold to the ports when fitted.
Paul
Sounds like a neat solution Paul.
Cheers