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  #76  
Old December 30th 2006, 14:31
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Wally Wally is offline
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This is version 2.0



Yeah, I know what it looks like

The idea is to help the air make the 90 degree turn towards the heads and than again 90 degrees so that the air flows alongside the heads and air comes from the front (again, like original) and from above.
With this form I hope the air stays laminar and the heads that need more air get it in this way.
Also hope that overall cooling is better now the heads are more favoured for cooling

Walter
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  #77  
Old April 15th 2007, 17:27
Tony Z Tony Z is offline
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hey Wally.... hows things looking in the development front???
This is one of those threads that I am keeping my eyes on!!!!!!
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  #78  
Old April 16th 2007, 02:50
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Actually very good, considering my limited time for this eleborate subject.
Due to lack of interest, I have continued the progress report on:
http://www.bug-talk.com/internationa...er=asc&start=0
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  #79  
Old May 2nd 2007, 15:37
Zman Zman is offline
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911 shroud progress

Wallie,

How's it coming on the testing. I saw a post 4/29, but didn't know if you picked up any good ideas fromt he show. I am a big fan of the DTM, but love the look and sound of the 911 style. I have a sharpe and a bernie bergman and the sharpe cools the best, I think it is because the bergman spins so fast. Anyway are you thinking of making some of these for sale? I am interested.
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  #80  
Old May 2nd 2007, 16:53
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Wally Wally is offline
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Quote:
Originally Posted by Zman View Post
Wallie,

How's it coming on the testing. I saw a post 4/29, but didn't know if you picked up any good ideas fromt he show.
Show? What show you mean?
Anyways, all worked out very well, but I am not intending to make any for thrid parties as the work would never pay for itself and I then I would also have to maken them 'nice' and idiot-proof and I really am not into that. I have enoygh work on my own projects, which is a lot more rewarding ;-)
It actually turned out more easy than I thought, but you need to find out what mods work and which don't...
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  #81  
Old May 3rd 2007, 17:13
pantswagen pantswagen is offline
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hello pleaese

may i share my idea of
-having the shroud in 2 halves
-split on the same line as the case
-simply bolted together

-so, you can incorporate the front lower tins into it - for type one

-plus you could also incorporate a re-bate so it fits over the fan ring-snug
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  #82  
Old May 6th 2007, 14:13
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I think its a very good idea. I actually was thinking of eliminating the shroud-part over the top casing house as well as it doesn't have a function and only disturbs air-flow.

I only don't know the meaning of the english word 're-bate'? Coul you eleborate?

Tnx,
Walter
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  #83  
Old May 7th 2007, 20:40
pantswagen pantswagen is offline
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i

i was talking out of my arse, as
-i just remembered i machined the stock rebate off the fan ring

-what i meant was - the sock porsche ringhas a lip around it
-if the shroud was in half, it could clamp behind=total seal

-i was having a play with mine today, the fit to the heads is rubbish
-i like what you mean about keeping them low to the case, plus driving the air between the barrels seems logical

-i was even thinking about fitting the oil cooler-the stock one on the centreline, and ducting it out of the bulk ehead tin -like stock 911

-i just want to get my van back and get the engine in!
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  #84  
Old December 31st 2007, 11:46
dstar5000 dstar5000 is offline
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What you are talking about if bifurcating the output of the 911 fan.

It would look just like the annular cans in my old turbine engines.


Looking from the rear, they would be split at 1 o'clock and 7 o'clock, with
the 1 and 6 o'clock tube feeding the 3/4 cyls and the 12 and 7 o'clock tube feeding the 1/2 side.

I have made up foam models to do this, as it is an excellent idea, but I
have no fiberglassing savvy.

Maybe a fiberglassing GURU close to me would like to take on the challenge
of taking my foam molds and making fiberglass molds to test and share the results?

OF course, since it would be the most beautiful and efficient design/use of
the 911C2 fans(12-blade), demand will be so great that one person couldn't
possibly spend all the cash he would make off of my idea/molds, so he would also share
some of the profits, eh? BUWAHAHAHAHAHAHAHAHAHAHAHA!


Interested Wally?

Don

Last edited by dstar5000; December 31st 2007 at 11:48.
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  #85  
Old January 3rd 2008, 22:54
vw1303rsr vw1303rsr is offline
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Hi can someone enlighten me on what exhaust system is that on the pic with the RMB shroud? and what does RMB stand for?
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  #86  
Old January 4th 2008, 04:55
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http://www.rbernauer.de/

RMB=Renn Motoren Bernauer It is said he is developing the 4-valve aircooled head together with Martin Bott

From their site:

Last edited by Wally; January 4th 2008 at 05:03.
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  #87  
Old January 6th 2008, 15:24
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Just made two pics from Gerd Weiser's type 1 shroud from an indoor show today. If you look closely, you'll understand how nice this one has been designed and made:



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  #88  
Old January 6th 2008, 21:01
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Very interesting Wally.

It does look like the air is being forced between the cylinders on both sides of the engine, with a portion of the air split between the head.

Do you know how much development went into this shroud ?

I'll be restarting the work on my shroud as soon as the 2.4 is together and running, as I am using new cylinders.

Thanks for the pics !

*** Don ***

I like your idea too about splitting the air into quadrants and directing to a portion of the engine.

Sandeep
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  #89  
Old January 7th 2008, 10:56
Tony Z Tony Z is offline
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Wally

What are the chances that you got a picture of that shroud from the front? (where you mount the fan, looking into the shroud)
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  #90  
Old January 7th 2008, 11:53
eugene eugene is offline
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This is the inside if a Klaus shroud with the air distributor.
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