K26 Turbo?

[Jonas Majauskas]

On Mon, 28 Jul 2003, Dan Cordon wrote:

> Hey all,
>
> I had a question for fellow list members. On a 91 20V turbo, is there a
> benefit to putting a K26 turbo on when doing a chip upgrade? It seems to
> me that the stock K24 (while providing excellent spool times) is getting
> pretty inefficient at the higher boost levels seen with chips/springs.
> While the K26 isn't so great as the RS2, I just happen to have one.

Well, if that will be entertainment car - maybe K26 is more fun :) But I
think that real results on the track will not improve. It can be that they
will be worse :( Because you will have (more) turbo lag. And with K26 you
will not have flat torque from 2k to 7k rpm, thus you will need to revise
gearbox ratios... ;)

>
> Here's my thinking. I have an 87 5KCSTQ that I'm planning to do the 034
> EFI setup on when the stage IIc is available this fall. I plan to run a
> T3/T4 hybrid turbo on that with a coil-on-plug setup. At that time the
> K26 turbo from that car would be sitting around. It's in great shape
> too. Are the water/oil lines, and exhaust flanges compatible between the
> K24 and K26?

Yes, they are compatible. Though there is no nipple for WG (I think)
pressure line on the K26 cold turbo side. But you can get the cold side
shell off the K24 and put on the K26. This can be done, but there can be
problems with turbo balancing.

> If this is a good idea, then I'll have a nice K24 turbo sitting around.
> That seems just about right for a 1.8L DOHC VTEC in my civic hb. :o)
> Plus, being water cooled too is a bonus.

Water cooling is not cooling so much as you think. Main job is done by oil
cooling, water is just for insurance.