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-nick
Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA
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Posted: Fri Jun 03, 2005 11:11 am Post subject: All the KKK / K26 info you ever wanted to know |
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A collection of my notes, now you finally know what all the numbers mean. Enjoy!
K26 #6 turbine wheel - 48mm minor diam, 54mm major diam
#6 turbine housing minor bore = 48mm
#8 turbine housing minor bore = 55mm
Four numbers trailing the "K26" =
example, '79 RoW 931 K26-2470
"24" = 2.4" diameter for the compressor exducer (61mm)
"70" = compressor inducer is 70% the diameter of the exducer (42.7mm)
"R" - still unsure about this...
"6.10" refers to the turbine wheel, there's no rhyme or reason with KKK's numbering system here. For example a 5.10 could be larger than a 6.10 which could be larger than a 4.10. Stupid engineers...
The KKK part numbers have a little code too-
for example: 5326 970 7007
53 (?)
26 (compressor exducer)
970 (?)
70 (compressor inducer percentage of exducer)
07 (the last two digits look like version numbers)
----------------------------------------------------------------
931 Turbos:
79 M31.01 RoW
K26-2470 R 6.10
KKK p/n 5326 970 7007
compressor exducer= 61mm
compressor inducer= 42.7mm
trim= 49
compressor map: http://not2fast.wryday.com/turbo/maps/k26_map2.jpg
----
80 M31.02 US
K26-2664 G 4.10
KKK p/n 5326 970 6401 series I
6403 - Audi 200T '79 2.1L
6404 series II
6406 series III
6407 "
watercooled: 6411 - Audi 200T-III '84 2.22L
6413 - Audi 200T '81 2.1L
6415 - Audi 200T-II '82 2.22L
6416 - Audi 200,Ur-q 1/'83 2.1L
compressor exducer= 66mm
compressor inducer= 42.24mm
trim= 41
More info on the 6407:
Turbine housing p/n: 5326 101 6365
housing-exhaust diameters (reasonably accurate):
outermost 2 7/8"
inner 2 3/8"
innermost 2 7/32"
man-housing diameters:
outermost 2 1/16"
inner 1 21/32"
innermost 1 17/32"
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81- M31.03 RoW
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81-82 M31.04 US
K26-2660 GA 4.10
KKK p/n 5326 970 6020
6022
compressor exducer= 66mm
compressor inducer= 39.6mm
trim= 36
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Carrera GT (M31.50)
K26-2660 GA 6.10
KKK p/n
Compressor cover part number 5326-100-5104
Compressor wheel 5326-123-2017
Turbine housing 5326-100-6328
compressor exducer= 66mm
compressor inducer= 39.6mm
trim= 36
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924 Carrera GTS (GTR?)
Compressor cover part number 5326-100-5105
Compressor wheel 5326-123-2019
Turbine housing 5326-100-6330
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*Audi K26's below, "loose efficiency above 15psi, at 18psi they become
a heat pump" - from turbo builder
18psi ~ top of 70% efficiency range on maps
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84-85 Audi 5000T "KH" engine
K26-2664 GA 6.91
Exhaust outlet diameter: 1.95"
KKK p/n 5326 970 6412
compressor exducer= 66mm
compressor inducer= 42.24mm
trim= 41
compressor map: http://not2fast.wryday.com/turbo/maps/k26_map.jpg
*from map- quicker spool than 6.95, not as efficient at higher boost
*also- spools later than 931 map, build more boost
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86-88 Audi 5000T/TQ / 200T/TQ "MC" engine (5cyl, 10v)
K26-2664 GA 6.95
Exhaust outlet diameter: 2.20"
KKK p/n 5326 970 6411
compressor exducer= 66mm
compressor inducer= 42.24mm
trim= 41
compressor map: http://www.sjmautotechnik.com/parts_products/turbo/k26.html
"12-14psi is max on this turbo, anything more and intake temps rise
too much"
---------------------------------------------------------------------------
K26/6 turbo specs from 951.
Compressor housing :
ID intake 1-13/16"
OD intake 2"
OD outlet 2"
Compressor wheel :
Inducer dim. 1-3/4" (44mm)
Major dim : 2-9/16" (64mm)
= 46.63 trim
Turbine housing :
Inlet ID 1-15/16"
Outler ID 1-7/8"
6cm2 = 0.366 cu in A/R .? but in not sure about this. It seem pretty small.
Turbine wheel :
Exducer dim 2-7/16" ( 54mm)
Major dim. 1-7/8" (48mm)
= 59.17 trim
Last edited by -nick on Sun Nov 12, 2006 3:45 am; edited 3 times in total |
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-nick
Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA
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Posted: Fri Jun 03, 2005 11:13 am Post subject: |
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But wait, there's more...
Some general turbo info:
------------------------------------------------------------
Trim = (minor diameter^2 / major diameter^2) * 100
inducer - small diameter of the compressor wheel
exducer - large diameter of the compressor wheel
large inducer: more flow, more lag, surging concern
large exducer: less lag
large turbine: less flow restriction / less backpressure (more top end power), more lag
low A/R: more restrictive, less lag |
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-nick
Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA
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Posted: Fri Jun 03, 2005 11:17 am Post subject: |
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I can't stand it, what does it all mean?!
Well, among other things any K26 bearing housing with swap out, so we can easily upgrade to water-cooled housings from a 951 or Audi.
Also, there is a huge variety of compressor wheels available to us (though you have to change the housing to match).
If you want to change to a k26/8 hotside, all you need to do is bore out the exhaust housing and swap turbine wheels.
Cool, eh?
nick |
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macBdog
Joined: 16 Aug 2004 Posts: 1111 Location: Brisbane, Australia
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Posted: Fri Jun 03, 2005 2:07 pm Post subject: |
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Great info, thanks Nick. _________________ 1979 931 with a 350 chev
1973 911E with EFI
p-talk wrote: | I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways |
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numbbers
Joined: 05 Nov 2002 Posts: 1910 Location: Highlands Ranch, Colorado
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Posted: Sat Jun 04, 2005 9:51 am Post subject: |
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Good stuff, but I have two 6407s, and I can't figure out if they are series 1,2 or 3. I have different publications that list the 6407 as either a series one or a series three. _________________ 1980 924 Turbo |
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-nick
Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA
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Posted: Tue Jun 14, 2005 12:31 pm Post subject: |
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Hey folks,
A little more info- I picked up an early Audi oil cooled turbo. It's a 5326 970 6412. The important numbers are the "26" and "64" (compressor diameters). The compressor wheel is the same as the '80 and earlier US turbos. The bearing housing is angled slightly and won't mount up to our stock mount. The hot side housing uses a much smaller turbine wheel and outlet diameter while the inlet diameter is much larger than ours. Interesting.
Anyway, I'm going to be using the compressor wheel and cold housing from the Audi- just to make the plumbing easier for the IC.
nick |
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Raceboy
Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe
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Posted: Tue Jun 14, 2005 3:31 pm Post subject: |
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nick, is the turbine housing of that turbo in good shape? No cracks or anything? If it's so, I would be interested in that turbine housing.... I have this kind of rebuilt K26 (early Audi), but turbine housing is cracked (a lot). can you tell me the exact turbine wheel diam? _________________ '83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche |
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-nick
Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA
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Posted: Wed Jun 15, 2005 1:11 am Post subject: |
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I haven't taken off the housing yet, but it looks pretty decent on the outside. Exit diameter = 50mm on the Audi, about 56mm for the 931 (on the innermost diameter). I assume you'll need the turbine wheel too?
I wouldn't mind trading you for a bottle of Estonia's finest vodka- I know you guys hoard some good stuff
nick |
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Raceboy
Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe
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Posted: Wed Jun 15, 2005 2:26 am Post subject: |
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No, I don't need turbine wheel, it's there and in decent shape.
And I don't mind trading it with some liquid stuff _________________ '83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche |
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Pär Hylander
Joined: 22 Aug 2006 Posts: 7 Location: Sweden
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Posted: Sun Nov 12, 2006 1:17 am Post subject: |
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Carrera GTS (?)
K26-2670GA8-10
85 616 0363
5326 970 7008
Compressor cover cast: 2693 "diameter" 13 1 & 2691 "diameter" 18,3 9
Compressor wheel ?
Turbine housing 5326-101-6364
turbine 54.5mm
turbine >59 mm (impossible to measure due to foreign objects passed turbine, hole in housing 65.5 mm)
compressor exducer= 66 mm
compressor inducer= 46 mm
trim? |
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462avi
Joined: 15 Sep 2006 Posts: 149 Location: Hollister, California
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Posted: Fri Dec 15, 2006 1:36 pm Post subject: 924 cgt turbo |
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Nick
I sent you a pm about this. I just want to thank you again for hooking me up with Anthony. Now who wants to see a brand new never installed 924 Carrera GT turbocharger?
]
Thanks again
Geoff
P.S. I will try to post the p/n's from all the pieces on this thread _________________ 2005 C230K
2002 grand cherokee with 4.7L |
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Paul
Joined: 02 Nov 2002 Posts: 9491 Location: Southeast Wisconsin
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Posted: Fri Dec 15, 2006 1:57 pm Post subject: |
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Why does it have "Seattle" on the tag? _________________ White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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462avi
Joined: 15 Sep 2006 Posts: 149 Location: Hollister, California
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Posted: Fri Dec 15, 2006 2:28 pm Post subject: |
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I had the same question. The story I got was that they are a distributor for KKK. The p/n's jive with what nick has posted here. There are no tool marks on the unit anywhere. So it is either brand new or freshly rebuilt but for $400.00 dollars U.S. who's arguing
Cold side housing p/n: 5326 101 5190 f
hot side housing p/n: 5326 101 6366
Geoff _________________ 2005 C230K
2002 grand cherokee with 4.7L |
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Paul
Joined: 02 Nov 2002 Posts: 9491 Location: Southeast Wisconsin
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Posted: Fri Dec 15, 2006 2:58 pm Post subject: |
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Did you buy one or both of them from Tony, I almost bought both of them last Thursday.... _________________ White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy. |
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462avi
Joined: 15 Sep 2006 Posts: 149 Location: Hollister, California
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Posted: Fri Dec 15, 2006 3:08 pm Post subject: |
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Just the one. No need to be greedy. Just kidding, the old lady was less than pleased to have to shell out 400 let alone 800. I had gone through a fiasco with another seller. He tried to sell me a bum turbo for 100. He had the same problem with his that I had. The hotside housing cracked and destroyed the turbine fan. When I inspected the unit he had filed down the blades to hide the evidence. Saw right through it though. I can't wait to strap this sucker on though. I think I am about a week from starting my car for the first time in ten years!!!
Geoff _________________ 2005 C230K
2002 grand cherokee with 4.7L |
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