ryanm6100

So I'm procuring a k26/8 from a fellow lister, and am wondering what all I should/want/need to do at the same time. I've spoken to a friend and local lister (pauerman), and we came to some conclusions, but I'm always looking for opinions and expertise. I need to do an oil pan gasket job also, so I'm already in over my head as it is. So it looks like this won't be cheap, so what the hell, let's dive in.

What do I NEED for the turbo to be safe/efficient/powerful?

What SHOULD I do while I have the whole damn thing apart?

What COULD I do to achieve 300+++ rwhp?



Keep in mind this is a 90% street daily driven vehicle, but I see that changing in the near future when I graduate college, so I don't mind taking steps to make it more like a weekend warrior/track star.

TIA,

Ryan

Cory9584

you need a new chip for that turbo. While your there i would change all the oil seals also

robinsonracing

I had a stage 2 intercooler, 48lb inj, chips, a cat bypass pipe, 3" fabspeed exhaust, 3 bar fuel reg and this turbo and made 300rwhp, add tha maf and better tuning and got 320 rwhp and 370 Tq at the last fest so there is the facts for a 2.5 with a 26/8.
Brian

DrZ1

With my oil pan off I had the linsey racing baffle welded in and pickup tube modification. I had an 86 which I gather has a poor design.

ryanm6100

I have plans to do that as well, but Vic (Pauerman) is currectly working on a baffle as well, so I think I may source mine from him - if he decides to produce more. I saw what he plans on putting on his car today and it looks like a solid design. Very similar to the LR baffle.

aeronautica86

what boost were you running when you made those numbers?

buxton

I just bought a 26/8 for mine too. Are there any gaskets or other parts needed to make the turbo swap?

Acetylene

You need to replace the exhaust rings and the oil o-rings. Any of the normal suppliers (Paragon, Lindsey, etc) will have them.

Gator_86_951

Have it rebuilt? Also, look into the pan gasket retainers from myswiss since you will have more blowby with the higher cylinder pressure.

robinsonracing

Stock shimmed wastegate and 18lbs but would fall of bad.

DrZ1

Vic is a good guy, I bought my 86 951 from him, as he rebuilt it 2 years ago and except for some 20+ year parts giving way, It has held up well.

ryanm6100

Agreed. He was extremely helpful when I first bought my 86, and he continues to be a great source of knowledge(and parts ) when I'm in need.

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As far as the boost roll-off at the high rpm's, what can I do to combat that? I know I can't eliminate it, but what steps can I take to reduce it?

Jake951

My K26/8 can hold 15 psi to redline, but not more. I know others have reported the same experience with the K26/8. I can get more boost in the midrange but it always rolls off to 15 psi at the top end. I have a 38mm Tial with a 1.1 bar spring and that doesn't eliminate the rolloff. Maybe less exhaust restriction might help. However, I'm not sure you can make much more power from a K26/8 by trying to run higher boost at the top end although you will make more heat.

facboy

i gotta be honest...if you're going to the trouble of getting a new turbo, why a k26/8? i'm no expert, but aren't there better options out there? like a k27/6?