911 Cooling Shrouds - Improving Internal Air Distribution

[063bug]

Sandeep,

Is there any chance of getting pictures of the mods to the 911 fan.....?

Regards
063bug

Originally Posted by Sandeep

The shroud with the mods to the back of the 911 fan is working great. The hottest temp I have to date is 361F on #4 at 17 psi, 5400 rpm in 4th.


sandeep

[Wally]

Well, since I need to make my own shroud for the 2,7 anyways (its VERY wide and the Oettinger cylinders are quite some wider as well) and the case has been cut for the Ahnendorp system may many moons ago, I have started sculpting class:

Here's a picture of a RMB shroud with an even more pronounced 4th cylinder air path:



More pics in the next post:

[Wally]

Obviously this idea has worked better than the older BAS 'low' shroud, so I will 'use' this idea in my own 'mold':









I need to make a mold from this form later, then make a shroud and then cut that one up to make a wider one from it...Pfft lots of work ahead. Luckily its X-mas holiday and I can foul around a little.

Walter

[Wally]

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

[Tony Z]

hey Wally.... hows things looking in the development front???
This is one of those threads that I am keeping my eyes on!!!!!!

[Wally]

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

[Zman]

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.