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  #91  
Old January 7th 2008, 16:40
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Wally Wally is offline
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Very cool Eugene!

By the looks of it, you also have the special welded-up heads from Rolf Klaus!
Could you give more info on these heads and what motor you use them on?

What version of the Klaus cooling system is yours?

Thanks,
Walter

PS Sorry , don't hav emore pics or info on the GWD type 1 shroud, but its around for quite some time now..
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  #92  
Old January 7th 2008, 21:01
eugene eugene is offline
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Hi wally. No this are not my engine. Is a picture Klaus has send to me to help me with the shroud installation. He did not have the english instructions made jet when i received the shroud. I dont know a lot abouth his heads other that that can be seen from the pictures from his catalog. But he claims he is near the 100hp/l. I also noticed the fins on the top off the heads in this picture. Above the plug. They seems longer that the fins from some other pictures of his heads. Probably machined from a small block of alu and welded on top for strenght. He also uses the additional fin like other german tuners. But he don't use the GB plug position and he wrote: ''Because of to much differences between the compared engines, I could not
yet find out till today, if there is a gain of torque or power output using the GB heads. But they will get a crack to both sides of the spark hole after some
time.'' I think his chambers are reshaped. At least as much i can judge from the pictures.
I have the 3rd version of his shroud but i did not buy the RSK. I was considering it but he said that there is too much work on the heads to carry it by myself and had not any instruction written couse no one have bought the RSK in order to instal it be himself and that it will interfer with ordinary aftermarket exhaust like BAS,... He said the RSK is working great and he is using it for engines from 2.4 and up and really make a difference when driveing top speed for long time.
The pieces i have brought from him are indeed top quality and he was also kind to answer to all (dumb) questions a made.

I will take some better pictures of the shroud when i will home. I dont have any on the comp.
The engine will be a 100x71 with the NOS mahle nicasil i have posted pictures on the STF some time ago. I have Thorsten lifters -thanks for the link BTW. AMC new castings reworked by me with 44x38 valves and some moods to the chamber. I don't know for the cam yet I have a cheap USA 298° but i would like a split duration-lift. I would buy one from klaus but are crazy expensive and he is not selling cams alone. Rammele had some split cams listed if i remember correctly, but not any more and is difficult to get anything from him. I'm not fan of the Shlecher- no enough lift. And sure don't want to buy the whole cam package for a RAT cam- but would love one. So any options to get a split duration-lift from europe? Do you know anyone who will grind a custom one?

Sorry for the off topic. I will pay off wit some pictures when i get to my shroud.

Best Regards
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  #93  
Old January 8th 2008, 08:40
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Wally Wally is offline
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Thats excellent Eugene!
I thought I recognised his heads from your pic
The measurements he takes with his heads (which you mentioned) do concur with his cataloque writings and website

I remember (yeah, I know..) that Wilke Tuning from germany used to make and advertise split-duration cams. Not sure if they still exist tho. Site hasn't been updated for ages...
http://www.wilke-motorenbau.de/index.htm

But the most available are the split duration/lift cams from webcam and they also make you a custom split-duration/lift at a very small extra cost. You can contact them directly or order a custom one throught aircooled.net.
My turbo engine will use a custom webcam with Thorsten lifters. I have good faith that combo will live a long life, but as always, no guarentees...

Greets,
Walter

Last edited by Wally; January 8th 2008 at 08:41.
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  #94  
Old January 21st 2008, 06:06
eugene eugene is offline
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As promised- pisc of the klaus shroud of the 3rd generation. Note the complex shape on the back plus the mentioned internal air distributor. Sure some development went into this. The shroud uses a smaller porsche turbo like fan. 225/250mm diameter.



Last edited by eugene; January 21st 2008 at 06:07.
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  #95  
Old January 21st 2008, 07:29
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Eugene does you fan ring carry this code 901 106 101 5r on the fan ring. Why i am asking is because i think i have a turbo 911 fan and i am not sure. Also i need to change the fan it has some of the blades with cracks in them.
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  #96  
Old January 21st 2008, 07:44
eugene eugene is offline
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The ring is not an porsche item. Is made by Klaus so no OEM numbers. The outer diameter (250mm) is smaller than the turbo unit. I think the 11 blade fans are ok to be turned down to a smaller dia. and the twisted- end 12 blade are not because of drastic loss of air flow. I think GWD uses a turned down 12 blade fan(240mm). If you are planing to turn down a original porsche fan, you must buy a smaller ring from a tuner and have the fan rebalanced afterwards. I think it works this way.

Last edited by eugene; January 21st 2008 at 08:07.
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  #97  
Old January 21st 2008, 09:17
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Very nice Eugene! Thanks for posting!
Did you also got the special pully- and rear engine tin that seals of the engine compartment above the exhaust (and bell housing)?
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  #98  
Old January 21st 2008, 09:49
eugene eugene is offline
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No i did not. i have considered the pully cover but is quite expensive. i'll fab something from alu sheet metal. Klaus has some really cool things. Like his alu head covers and the central filter system. Clever design. If just money would be no problem.
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  #99  
Old January 24th 2008, 14:50
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Some pretty good info I found at our french sister-website www.germanlook.org :


Early 911 245 mm fan with 1.3: 1 pulley ratio 1390 ltr/sec @ 6100 rpm

1976-77 five bladed fan with 1.8:1 pulley ratio 1265 ltr/sec @ 6000 rpm

1978-79 226 mm fan with 1.81:1 pulley ratio 1380 ltr/sec @ 6000 rpm

Turbo fan with 1.68:1 pulley ratio 1500 ltr/sec @ 6000 rpm

964 fan with 1.6:1 pulley ratio 1010 ltr/sec @ 6100 rpm

New twin turbo with 1.8:1 pulley ratio 1210 ltr/sec @ 6100 rpm.

Early 911 245 mm fan with 1.3: 1 pulley ratio 1390 ltr/sec @ 6100 rpm


..................diameter (mm).........rpm.........pulley ratio....speed (ft/sec)

early 911................245..............6100.......... ..1.3 ..............334

76-77 5 blade..........245..............6100............1. 8...............462

SC.......... ...............226..............6100............1. 8...............426
.
930..........................245.............6100. ..........1.68...............431

964/993................... 279.............6100............1.6............... 468

993tt.........................279.............6100 ............1.8...............526


1965-74/75...... 110 mm crank..................95 mm fan pulley
1976-77... ........130 mm crank..................83 mm fan pulley
1978-79............130 mm crank... ..............80 mm fan pulley
1980-89............120 mm crank..................83 mm fan pulley

fan sizes / blades / air flow:

1965-74/75........245 mm / 11 pales.........1.3:1 ratio..1390 liters air/sec
1975/76- 77......245 / 5 pales..................1.8:1 ratio....1265 l/sec
1978-79............226 / 11 pales ...............1.8:1 ratio...1380 l /sec
1980-89............245 mm / 11 blade.........1.67:1 ratio...1500 l/ sec
964...............279mm / 12 pales......... 1.6:1 ratio..1010 l /sec (!)

And the best part:

An original 12-blade 964 fan uses only 8,1 hp at 6100 rpm!!
I say that is WAY less than a type 1 fan at that rpm
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  #100  
Old November 2nd 2009, 13:48
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bigwigracecars bigwigracecars is offline
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Quote:
Originally Posted by Sandeep View Post
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.

The car runs awesome with the turbo with temps averaging around 320F while driving around town. On the highway they average about 340F with all cylinders within about 10F of each other.

The Megasquirt EFI really helps as well, as does the LC-1 because I can dial in exactly the A/F ratio I want. The EDIS helps as well because of the programmable ignition.

I really did not know what A/F ratio I was running with the 44IDF's and not exactly sure of the timing with the 050 Dizzy, because the temps I am getting with the EFI/EDIS/Turbo are close to what I had with the 44 IDF's/050 Dizzy/No turbo.

So overall, I am extremely happy because I KNOW I have a 911 shroud that cools well enough for me to run a turbo at 17 PSI

Engine is currently apart to fix a loose valve seat and is getting an overall refresh. Will be terrorizing the streets again in spring 2007

Sandeep

sandeep
I know this thread is old, but Sandeep, can you repost the pictures of your shroud mods? They're not showing up any more, and I'm interested to see what your final set-up looked like.
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  #101  
Old November 27th 2009, 01:14
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KAFUR1 KAFUR1 is offline
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please I 2nd that I am tryn to find the best 911 shroud for my turbo motor ....
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  #102  
Old December 14th 2009, 01:25
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Yes please I 3rd that
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  #103  
Old December 15th 2009, 12:58
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Sandeep Sandeep is offline
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I'll have a look and see if I can find the pictures this weekend.

I'm looking into a horizontal shroud now as I need to fit the intercooler into the engine bay.

I will more than likely make my own as I can't justify spending another $1200 CDN for one

Sandeep
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  #104  
Old December 16th 2009, 21:36
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911 cooling

Is that for one like wally has?
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  #105  
Old December 17th 2009, 02:27
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Scotts73SB Scotts73SB is offline
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Isnt that the same shroud and set up thats on a Corvair? (The axial or horizontal ones your talking about)
I wouldnt think those are too expensive I know around here theres tons of em in barns sitting slowly sinking into the ground.
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