Polish of in.manifold channels

[Billman]

I Thought polish you mean like the outside of Sweepers IM! Mirror Polish!!

[Erikb]

I do a lot in outsourcing of all kind of parts (aluminium, Steel, stainless steel and plastic) and machines, we have several companies in netherlands, Poland, Czech Republic and China. If i have a proper drawing(or even better an example) of a part which is popular I can try to get some decent prices for it. from the european countries we have full truck loads on every week, from China approximate ones a month. I could ship the parts together with our regular parts for free.

[Billman]

Erikb, Sweeper can maybe help you with this or maybe Lee!

[SteveH]

I do a lot in outsourcing of all kind of parts (aluminium, Steel, stainless steel and plastic) and machines, we have several companies in netherlands, Poland, Czech Republic and China. If i have a proper drawing(or even better an example) of a part which is popular I can try to get some decent prices for it. from the european countries we have full truck loads on every week, from China approximate ones a month. I could ship the parts together with our regular parts for free.

Erikb...you will be a very popular man if you can get parts made and delivered from China

[Erikb]

My next visit to china is planed on the 11th of Januar.Maybe it is possible to send me some drawings of parts or a sample(not to big, I have to carry it with me in the plane). So if there are some good drawings of a part (rs2 calipers, IM, EM etc) I can try to get some prices.
Especially parts where a lot of labour are involved are very interesting, Ithe shipping costs from china to the netherlands are "free". From there I can send it to many locations.

[4WheelDrifter]

You may end up with a lot of friends here Erikb!

[Greg_S]

From what ive read in the past vadim polishing inside of IM is a bit pointless and the air flow is better in there with it as is. excluding removing the screw pipe bits etc and that sort of thing.

Greg

[Billman]

Please Give someone ErikB a drawing of an Dahlback IM or MTM or something better than this so he can tell us a very Friendly Price!!!!

@Sweeper

Now will your first cylinder fed will less air?? Which design is better??

[Erikb]

I really need something like an autocad drawing. With al the sizes, kind of material, etc.

Are there maybe some drawings of the rs2 brackets?

[4WheelDrifter]

I think Lee's got his own IM project on CAD. Maybe you should team up.

[Rusty]

Inlet looks awesome!

Going back to the original thread:-

wrt polishing, some turbulence is required in the inlet to ensure that the flow of the air remains fully turbulent and does not drop anywhere near the linear region where the the wall shear forces cause high drag and therefore poor efficiency. A rough finish is therefore important in all cases almost irregardless of where the fuel is mixed into the airstream.

Enlarging the ports, removing any sudden changes in crossectional area and smoothing sharp corners would be a much better exercise, almost irregardless of surface finish (within reason).

Turbulence also ensures that the fuel air mixture entering the cylinder is well mixed and so reduces the variation in rich and lean volumes across the cylinder, thus regulating burn rate, reducing incomplete combustion in the cylinder and so improving efficiency.

There is a school of thought that inlet manifold 'polishing' does more harm than good but that's in the world of NA engines and they use carbs lots... cool!

HTH

[Greg_S]

thats pretty much the jist of what i was trying to say very quickly. lol

[Rusty]

LOL! Just thought I'd start flexing my knowledge from 4 years at uni (3 1/2 drinking and 1/2 working!) and see if it translated into the real world. Felt like the right time. Thanks for listening/reading.

[4WheelDrifter]

Get your riffler files out!

[Rusty]

????