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All Spooled Up
 
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
Here's Some K26 turbocharger info - mostly for 931's (& Audi's).

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"


----
81- M31.03 RoW

----
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

----
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

----
924 Carrera GTS (GTR?)
Compressor cover part number 5326-100-5105
Compressor wheel 5326-123-2019
Turbine housing 5326-100-6330

__________________
>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 10-04-2010, 07:16 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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Join Date: Jan 2006
Location: Eau Claire, WI
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Your link to the compressor map is broken.

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81 931
-efi via some megasquirt stuff
Old 10-04-2010, 08:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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