toddk911

I currently have my 87 951 into my long time mech shop after doing most work myself and as they were putting new J boot on (old one had 3 intake leaks) they realized the boot did not fit the turbo intake. The intake is 2.75. Case is very close in size of K26 but they do not see any stamping on the case. They are pretty sure it's not KKK. They will check it more today and try to see what it is. The PO must not have known as he did not mention it. I would expect him to have said as that is usually a good selling point that an updated or aftermarket turbo has been installed. The thought never crossed my mind as with my mods, my car seems to run about the same as other guys in here with same mods and stock K26. I guess I will have to get my GURU's re mapped. Danno????? Travis??????

special tool

Well if it helps, the intake on my kkk 27 is 2.75 (7cm.)

streckfu's

Nice surprise Did you ever pu it on the dyno and check your AFR?

<img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" />

Danno

Simple way to attach a stock J-pipe to the larger 2.75" OD turbo-inlets is to shim it on the outside:

1. First, put a 1" long section of 2" steel tubing inside the J-pipe to make it stiff.

2. Then put a 1" long 2.75" OD tube over the end of the stock J-pipe, this shims it up to 2.75" OD.

3. Butt this up to the new turbo's inlet to verify they are roughly the same 2.75" OD.

4. Cut a 3" section of 2.75" ID tubing and fit half over the turbo's inlet and half over the shimmed stock J-pipe.

The steel tube inside the stock J-pipe allows you to tighten down the hose-clamp and not have it collapse.

Todd, send me an email with more details on your turbo, I've got a K27 chip that Ski help me create with a wideband O2 monitor. It'll let you run 18psi safely with your turbo.

toddk911

Ok, guys thanks for all the info. Getting car back today. AHHH it's raining. Hard to test drive.

So is the 2.75 a dead give away that it is a K27?

Wouldn't the K27 case be a lot bigger than K26?

Danno, I will send an email asap. I will take some pics with dig cam and attach to email. In regards to a/f, I would guess it is ok, as I am only running 15psi.

toddk911

Ok, had her out today and got more info from mech.

The case is K26 size, but the impellar is a lot bigger than stock and has "dual" fins, i.e. a small fin in between each large fin. Could not see exhuast side.

Piping is all done nd she flows a lot more air, revs come on a lot faster with new bigger hose/tubing, can hear it spool real loud, but boost seems to be coming on later than before. I guess with smaller piping, the air had some inertia build up and brought boost on sooner. I am seeing full boost at about 3500-3600.

Also, need to know if I can safely run more boost.

Mechs adjusted CO2 and richened it up a bit. Guess I need to get to a dyno or wideband now to be sure what I am producing.

Luke

get on the dyno and tune. You wont beleive the difference alittle tuning does