Puzzlement

[Dan Cordon]

> In reading the various threads on 5K, 10 valve turbo upgrades, it sounds
> like the K24 spools up faster, delivers more low end torque, but runs out
> of juice before the K26, which, in turn, maxes out before the K27, which is
> capable of more high end, locomotive-type power... If I've been getting
> this correctly.
> If the K24 is the hot ticket for the 20v:
> A.  Wouldn't the K26 be an upgrade for the 20v?
> B.  What are the limitations  of the K24/ 10v head?
> Thanks for your consideration, and input.
> Mark Woodland

I have both a 5k and 91 200 20v. The K24 *does* spool up really early, 
but I've heard it's not good for much past stock boost. In fact, on my 
20v it starts to lose boost at higher RPM's.

I posed a similar question about putting a K26 on a modified 20V, and 
most every reply I got said that would be a downgrade. I'm sure it's 
capable of more boost, but the boost threshold would not produce much 
boost at low RPM's. I wouldn't expect it to spool up anywhere before 3k.

What about hybrid turbos? Any benefit to putting a K26 compressor on a 
K24 turbine? I know I can't afford a RS2 turbo any time soon.

As for the K24 on a 10V head, I thought all the US 200's (starting in 
89) had K24's on them. I haven't owned one though, so I can't comment much.

-- 
Dan Cordon
Mechanical Engineer
University of Idaho - Engine Research Facility