K26 sizes

[auditude at cox.net]

Thanks Matt,

So the difference is on the side of the turbine housings that interfaces with the bearing housing/cold side, or what you describe as the turbo itself?  I haven't had a turbo apart yet, so I don't even know what that's like.

Are the housings different externally, like the inducer and exducer diameters?

A (non-lister) friend suggested I try to put a K24 cold side on a K26 to see what would happen.  Is that even possible?  I guess your desription of using the KH  turbo with the ur-q turbine housing, makes my minds eye see that that combination would probably be possible, and result in there being lots of space for the exhaust to get past the hot side wheel (without necessarily spinning it) through the larger housing.

That's basically what "clipping" does, right, allow more exhaust to flow through the turbine, at the expense of spooling (engine) RPM?

In summary, I guess the hot side controls the rpms that the turbo spools at and the ability for the motor itself to breathe at high rpms, and the cold side affects efficiency and production of heat when making boost.  A bigger hot side like you describe lets the motor breathe better at higher rpms, but I imagine the boosted air is hotter than if the cold side was bigger too.

Ken

Stpndsmnn at aol.com wrote:
>
> Hey Ken,
>
> One really easy way to figure it out is to pull the turbos apart and see
> which ones fit and which ones don't...  just remember which housing goes with
> which turbo.
>
> The difference is very obvious,  I have an UrQ K26 and a KH K26 (both
> ported),  the UrQ is much bigger, will not even come close to fitting the KH
> housings.  One fun thing I did was use the KH turbo with the Ur exhaust
> housing,  not much loss in spool but really opened the top end for the small
> turbo.
>
> The bigger K26 actually feels more streetable to me,  The Ur version pulls
> 5th gear as easily as the KH version pulls 4th..
>
> HopeTH
> Matt
>