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Old 04-19-2012, 06:16 AM   #16
pkboxer
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Valve Cover

This may be common knowledge, but is that a special valve cover, or some kind of add on to spread the pressure of the acorn nut to more of the cover?

Exhaust is looking nice BTW.
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Old 04-19-2012, 10:11 AM   #17
lightfighter
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noice!!!!
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Old 04-19-2012, 11:27 AM   #18
bmweuro OP
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Quote:
Originally Posted by pkboxer View Post
This may be common knowledge, but is that a special valve cover, or some kind of add on to spread the pressure of the acorn nut to more of the cover?

Exhaust is looking nice BTW.
The valve covers a 3 piece design made by Siebenrock in Germany and around 200.00 a side. Cool but not cheap.
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Old 04-19-2012, 11:32 AM   #19
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Valve cover

What is the improvement for $200 a side?
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Old 04-19-2012, 11:48 AM   #20
lightfighter
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What is the improvement for $200 a side?

improvement? whats that mean?

its almost like you dont have a motorcycle.
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Old 04-19-2012, 12:10 PM   #21
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rewroded

What's the "allure"?
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Old 04-19-2012, 12:47 PM   #22
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They're spilt in half vertically (& joined under the cover thing) so if ummmm.... something happens to one side then you can either work on or replace that half that's damaged. Means you can carry 1/2 a cover when racing. Or that's my take on it anyway
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Old 04-19-2012, 01:18 PM   #23
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Originally Posted by Padmei View Post
They're spilt in half vertically (& joined under the cover thing) so if ummmm.... something happens to one side then you can either work on or replace that half that's damaged. Means you can carry 1/2 a cover when racing. Or that's my take on it anyway
You are are correct sir.
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Old 04-19-2012, 01:20 PM   #24
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Originally Posted by lightfighter View Post
improvement? whats that mean?

its almost like you dont have a motorcycle.
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Old 04-20-2012, 11:22 AM   #25
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fellow pipe maker

Hi looks as if i am not the only one making pipes this week. your high pipes are looking good, are you going to do the joints with springs? see you have gone for a long length of pipe, are you working to some figures, or for what looks good?

i found a site that did a pipe length calculator but you know the internet it may be way off.
i have gone for a short system, mainly as i didn't have much tube about, (most has come from cutting up my standard system) also i thought it would make getting the rear wheel on and off easy. still got to chop the can about and do some sort of baffle.


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Old 04-20-2012, 01:23 PM   #26
Padmei
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Quote:
Originally Posted by simonboxeproject View Post
Hi looks as if i am not the only one making pipes this week. your high pipes are looking good, are you going to do the joints with springs? see you have gone for a long length of pipe, are you working to some figures, or for what looks good?

i found a site that did a pipe length calculator but you know the internet it may be way off.
i have gone for a short system, mainly as i didn't have much tube about, (most has come from cutting up my standard system) also i thought it would make getting the rear wheel on and off easy. still got to chop the can about and do some sort of baffle.

Where do you guys get the materials for making the pipes? Did you bend them yourselves or get them bent, buy the bends as they are or cut up existing? When welding the pipes is there much 'crap' from the welds inside the pipes (as in anything that would cause the exhaust flow to be impeded)?

Good work btw.
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Old 04-20-2012, 01:51 PM   #27
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Quote:
Originally Posted by pkboxer View Post
What's the "allure"?

Those are copies of the two peice valve covers used on BMW's up to the early 50's.
BMW probably had a pretty good reason for joining the two halves together into the one-peice covers they used from the early 50's on.
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Old 04-20-2012, 01:57 PM   #28
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The 2 piece valve covers would probably seal better on severely warped heads.
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Old 04-20-2012, 03:53 PM   #29
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parts

Hi Padmei,

I have done mine from original pipes and some pre bent tube sections. The Mandrell bent tubes are available on line over here http://www.ospreyexhaustcomponents.c...ends/c_23.html
this is where mine came from.
i did mine as follows (see pic)
1 from old pipe cut off from down pipe first bend
2 from old pipe straight section from under pot
3 new 90 deg bend
4 made from old pipe sections from near balance pipe spliced into "y" section
5 new 2" 45 deg section
6 made from parts cut from old silencer.


the pipes that i had were s/steel 38mm and i tig weld them, there is some penetration on inside as i do not blank the pipe and back feed gas in, but i take care and experiment with some off cuts to get best setting as a result the inside is not too bad.
hope this helps
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