[s-cars] Triple K part numbers

[Mihnea Cotet]

Mark, the triple-K terminology can be described as follows:

-53xx where xx is 24/26/27/28/29/32 and so on, relates to the bigger
diameter of the compressor wheel in inches, a K24 is 2.4 inches if I'm not
mistaken and so on.

-970 or 988 is the middle group that is unrelated

-xxyy where xx is the ratio between the bigger diameter of the compressor
wheel (i.e. the part that lays flat agains the compressor's backing plate)
and the smaller one (i.e. the diameter on the compressor inlet side). yy
seems to be unrelated, possibly related to the turbine trim but I'm not
sure so I won't speculate.

Thus, a 5324 970 7000 is a K24 turbo where the compressor wheel has a 70%
ratio.
A 5324 970 (988 for most recent ones) 7200 is a K26 turbo (although the
part number doesn't say it) from the Audi 80 avant RS2 where the compressor
wheel has a ratio of 72%.
72% is the biggest ratio that's available from triple K BTW, which means
you'll never get a K26 73xx or 74xx compressor for instance.

The RS2 turbo is strange because its part number indicates it as being a
K24 turbo, although almost all (if not all) parts inside are K26, BTDT and
disassembled one myself recently.

Thus, a K24 6080 has a 60% ratio compressor, IMO worse than a 7000 (stock
UrS4, UrS6, S2, 200q20v, Urq-20v, MC-2)

For the K27 family for instance, the sport quattro K27 has a 6486
compressor (I'm holding it in my hands) but some Porsches got a 70xx and
72xx compressor.

This has been explained to me by one of the engineers working for triple-K
warner's official importer in Belgium, he might be wrong, in which case I
stand corrected, but I think he is right, I've already measured and did the
math myself on a stock AAN K24, 200 10v MC-1 K26, RS2 K26 and SQ K27 and
all of them were correct.


HTH,

Mihnea

At 23:53 24/09/2003 -0400, you wrote:
>Hi group..
>
>Does anyone really understand the KKK numbering system.
>For instance a K26 is physically bigger than a k24 right,
>But what is a 5324 970 7000 - our K24's
>vs. 5324 970 7001 or 7200 for that matter.
>going to a k24 with say a 6080 , this should be smaller than the 7000
>correct ?
>
>I am just curious to try to compare turbos between manufacturers.
>Trying to do my homework so to speak.
>
>Thanks,
>
>Mark S
>
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