mmcdjs

Hello! I have found a 1985 Mercedes Benz 300 D with a K26 turbo that I would like to see if it would work with my 3.1L V6. Does anyone know if this would work? I normally drive around at 2000-3000 rpm (highway), and only go above that when I'm playing around.

mmcdjs

this turbo turbine seems to be about the same size as the garrett t-3 on the f**d engines. Why would it matter if it was from a diesel or gas engine?

TechSmurf

According to my docs, 1984 was the last year for the K26 on the benz.. also, according to my docs, the K26 wasn't used on the diesel version.. 85-87's KKK version was a K24.. but they all came on a 3.0l, so theoretical performance on a 2.8 should be decent.. post every number off the blue tag on the compressor housing, I'll see if I can look it up for you.

Diesel/gas makes no difference, but physical appearance doesn't either.. the numbers are the hard evidence. Precisely matching a K26 is almost impossible due to lack of specifications, though.. I've only found 2 K26 flow maps thus far.

Also, try to figure out which turbine housing you have.. (#6 or #8)

Doward

Yes, size can be misleading, and you can't go by application, either!

The Turbo Grand Prix (3.1) had a T25 Garrett stock. That thing is even smaller than the 14B I had on the 2.8, and guess what? That 14B was too small!

Most OEM applications, the turbo was a size or two too small, to have really fast spool up, and make it a 0-30 stormer. Made it feel 'fast'

mmcdjs

I'm going out tomorrow to look at it again, and I can take some pics of it. Doward, can you go over what I'll need to install a turbo on my 3.1L V6? Here's what I've done so far:

30 over hypereutectic pistons w/moly rings
10 over on the crank
H.O. oil pump with 3/4" pick up tube
modified the oil pan return baffle to allow oil pump to fit..
port matched and polished the intakes, heads, and exhaust.
msd blaster 2 coil
I have 19 PPH injectors waiting to go in
MTC-5 cam
new water pump
new battery
new distributor
8.8 MM Accel spark plug wires
stock plugs now. had bosch but they appeared to run too hot.
1.6RR w/v8 valve springs
increased fuel oil pressure to about 42 psi KOEO
hyper tech chip.
3" borla SS cat back exhaust
high flow cat

what I had planned on doing with the exhaust set up is to fabricate exhaust headers out of carbon steel pipe(3 inlet pipes of approximately 1 1/2" going into a larger runner pipe) and route it up and to the front of the engine. then they will join in front with a flange for the turbo off to the drivers side. the exhaust from the turbo will then go down and back over to the cat:lala:

what do you think? I can get the metal stuff fabricated fairly easily, but I need info on the other stuff that I need to do to make this thing work.

vortex

What do you mean you modified the oil pan baffle?

Other than that, it looks like a good start, do keep us posted on your progress..

mmcdjs

GM had sent out a service bulliten that the oil baffle inside the oil pan can cause the oil pump to cavitate and to remove part of it. It even came with a diagram on what to remove. I had to remove it for my larger pick up screen to fit into the pan, and I figured it would be a good idea to speed up the oil return to the pump suction area.. I got the information on the turbo from the web site mentioned in the turbo chronicles... it says the 85 300D had the K26. I'm not sure what the difference between the K24 and K26 is, and I can't find very much information on the boost pressure I'd get from either of them.

Doward

Depends on what size K26 as to how it'll do. Let us know how your setup goes!

mmcdjs

Doward,

what did you end up doing with the water problem? I found a fairly new IC out of a 900 SAAB that should work, but I'm not sure on where to install it. Maybe in the nose section? What about the chip problems? you had a maf system and I have a S/D system. Will my MAP be able to handle the increased air flow? Also, I can't get your pics from the chronicles to load, would you mind zipping them and emailing them to me?

thanks

dale

mmcdjs

Oh yeah. another problem that I've been wrestling with. I can get the piping made up, but it would be with 90 degree elbows instead of bends. will this be too restrictive on the air flow? How about if I increase pipe diameter?

Doward

Um..

Seems like you've got a lot of problems to work out... I could type out a million answers to a million questions... I'd suggest you find a book called Maximum Boost by Corky Bell, and do some research of your own.

Let me put it this way... there's over a full year of R&D in the setup that Vortex and I have been working on. We've come across and eliminated a billion problems, and there's really no way I could possibly recount every one of them.

A setup like this isn't something you can just jump into. There's a hundred things that have to work together, in order for anything to work, and you not end up with a blown rod, a melted piston, or burned up valves.

I hope I don't sound rude, but I'd REALLY recommend you do more research into this. There's a reason (actually, like a thousand) that MANY people have talked about a turbo setup, and NO ONE has gone through with it.

TomP, I think you've been on here longer than anyone - how long have people talked about this, without results?

Sure, V and I have gotten the turbo running on the 2.8. But we still had some small things to work out, upgraded the turbo, and in the middle of the turbo rebuild, the bottom end of the 2.8 went. Adding 50%+ power to a vehicle is NOT for a vehicle with ANY problems. I had a small lifter tick (partially collapsed lifter) that literally IMPLODED on me.

I don't want to talk you out of it, I'd just hate to see you halfway through it, and have something blow up in your face.

Research....

mmcdjs

I have just rebuilt the engine and it's strong as heck! I'm running about 60 psi oil when I'm tooling around at 2-3000 rpm.. falls to about 20 when I'm idling though. I can get the fabrication issues figured out, but I'm looking to see what other kind of problems you ran into.. computer, injectors etc.

Doward

Short of a standard kit, depending on other factors -

Your mileage may vary

Like I said, though, there's no way I can come up with every problem I've had. I've kept the board posted on like 90% of it.