RB20 (200cc) - Pictures and Spec

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corrado
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Sun Jan 11, 2009 10:36 pm

RinB wrote:The reason being that as the exhaust cracks opens the initial blow down doesnt go out of the port straight but at an angle of say 40-60deg then as the port opens it straightens towards the 10-15deg.

So to help that first pulse flow without hitting the opposing exh pipe side wall the ports are angled.

I believe this is the one major thing Terry shepherd wished he had done with the TS1 barrel

Smiffy
Anyone else find Smiffy's posts hard to read while bouncing up and down in the chair? :lol:

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RinB
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Sun Jan 11, 2009 10:42 pm

:lol: :lol: :lol:

I find putting my hand over it, it helps.. :lol:
If its made of Metal Fettle it !!

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RICSPEED
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Sun Jan 11, 2009 11:58 pm

RinB wrote:The reason being that as the exhaust cracks opens the initial blow down doesnt go out of the port straight but at an angle of say 40-60deg then as the port opens it straightens towards the 10-15deg.

So to help that first pulse flow without hitting the opposing exh pipe side wall the ports are angled.

I believe this is the one major thing Terry shepherd wished he had done with the TS1 barrel

Smiffy
yes he did say so in the scootering interveiw Image
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fishi
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Mon Jan 12, 2009 10:42 am

Powolotti wrote:brilliant documentation Dan :!:

this boostport thing...dunno :o Can we expect Airsal to have a flowbench where they test prototype cylinders? Or is it just a "here´s too small, add something here" approach?

Yes, they have a flowbench, you can truste me. ;)

fishi

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jason frost
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Mon Jan 12, 2009 3:10 pm

RinB wrote: As for the manifold definately weld it up and reshape without any hesitation ,Ill put some pics on here later. But I think Jason has already shown this.on old forum :!:
Here you go ;) but i will be making a new one to go ith the V Force reed

Image

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DMC
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Mon Jan 12, 2009 3:16 pm

RinB wrote:Dan good report m8
Definately intreged about the 3 three finger boost port I believe the rb250 has the same port but still keeps the bridge
Exhaust ports.

Watch this space as I will hopefully have one on the table next weekend, & Ill do a report on the RB250 as you have done Dan. :twisted:

Word of WARNINING if stroking the RB's watch the boost port fingers ,as the bottom ring can catch under the finger in the port :o . Make sure you check this ;)

As for the manifold definately weld it up and reshape without any hesitation ,Ill put some pics on here later. But I think Jason has already shown this.on old forum :!:

Also I will show what I have done to a RB225 once its finnished, you have seen some photo's but they are I can asure you work un-finnished :roll:

Smiffy
you've got my attention Smithy, having a look and a good report on the rb25 is what im waiting for.

cranky
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Wed Jan 14, 2009 12:55 am

What is the total cost of the full kit ?

Or can it be purchased as individual items ?

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Bofs
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Wed Jan 14, 2009 11:13 am

Looks and sounds amazing. What about the wall thickness on the spigot taken to 66mm, must be well-thin?
Muffspeed....no muff too tuff
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1983 MotoVespa P200E
1957 Zundapp Bella 500 Auto

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fattspeed
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Wed Jan 14, 2009 9:04 pm

Bofs wrote:Looks and sounds amazing. What about the wall thickness on the spigot taken to 66mm, must be well-thin?
i fink its about £390 retail ?????? this one i got today but i am a dealer for af so ;)
whats ther in the full kit

Image you get all whats ther in the kit ;)

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RICSPEED
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Wed Jan 14, 2009 9:13 pm

nice one :mrgreen:
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