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I finally had some time to start my supercharger install.

So far, everthing has been a peice of cake, lucky I have a metal bandsaw and extra brass and aluminum lying around though.

I installed a Mercedes supercharger that is built by Eaton for the 2.3 liter Kompressor series cars and/or the SLK's. (I may be wrong about this but I should be close to the facts!). I purchased the supercharger and the intake and exhaust brackets (super important to pick these up!) off of ebay for about $442, including shipping.

I took a piece of 1/4" aluminium plate and cut it out to attach flat (like a plate) to two bolt holes on the passenger side head. I had to cut out to accomadate the spark plugs, injectors and a few little other things. I only had to do it twice. Then I bolted it in and set the supercharger on top of the plate and eyeballed the pulley in line with the existing pulleys and marked the holes to be drilled into the plate to attach the supercharger. Then dettached the plate, drilled the holes and reattached the plate and bolted the supercharger to the plate. I had to shim the front of the supercharger up to be in the proper vertical plane for the pulleys to be in allignment. Still needs a little work to be perfect.

Since the power steering pump is basically in line with the alternator pulley and the supercharger pulley, I fabricated a rigid extension to hold an idler pulled to push the belt down across the powersteering pulley and then back up over the supercharger pulley. This seemed to work very well.

This took about 4 hours to do and was all I could do today.

The next steps are to get along enough belt (56.5 inches), cut off the supercharger intake and weld the MAF sensor to it and install a panel air cleaner that pulls air through the hood (and cut a hole for hood scoop, cut and reweld the exhaust bracket off the supercharger so the air goes in the right direction, and finally and most importantly, head over to my exhaust shop so they can bend and creat my actual new air intake tubing.

Yes, I will post pictures sometime after borrowing a camera that takes those new fangled "digital" potatoes.


i suspect boost will only be about 3-4 lbs, because I have an underdrive pulley currently installed.


Update 7/2/04

I installed the belt just now and it works! I just stood there going "cool!" While the supercharger is just hooked up to the belt to see if it worked, it was still awesome to see it work and blow that air! It even sounds cool although my damn exhaust drowns out the supercharger sound. Rev the engine and put your hand over the exhaust pipe and just grin!

Next step is to fabricate the ductwork/piping and air filter set up. So close!

Update 7/3/04

Pictures!

Basic Bay View

http://www.vincentfurniture.com/photos/ ... t-view.jpg

Another Bay view

http://www.vincentfurniture.com/photos/ ... ll-bay.jpg

Just a sweet picture of the charger

http://www.vincentfurniture.com/photos/ ... ll-bay.jpg

And some explanation

http://www.vincentfurniture.com/photos/ ... llouts.jpg

#1 is the Mercedes supercharger
#2 is the plate the supercharger is attached too
#3 is the idler pulley (timing belt pulley off stock engine)
#4 underdriven pulley.


http://www.vincentfurniture.com/photos/ ... llouts.jpg

#1 is the plate
#2 is the supercharger
#3 is the idler pulley assembly
#4 is the idler pulley
[/img]


Update 7/8/04

Picture of Bay with all installed parts.



1=MAF attached to air filter. I cut out the fender well to JAMB this into place. I still need to get a real MAF to air filter connector.
2=Two part custom welded intake for the supercharger. I took the original intake, cut off the top, and welded some other part (the black thing) to the top of it. I dont know where the black thing came from other than I won it as a piece of the supercharger action. I suspect it was part of the throttle body intake. Cost $40 for both parts)
3=Custom braket cut out of 3/8" steel Cost $60
4=Original crank. Too small. Needs to be about 8" in diameter. Hope to custom fab one this week for about $100.
5=Custom intake. Had made at my muffler shop for $75.
6=Nitrous Solenoid. You can follow the line above it to see it enter the intake right above #5 arrow.

Sweet Douglas! It'll be very interesting to see how this works out.

Sounds like a cool project for cheap. I can't wait to see the pictures. How are you increasing fuel? Extra injector that goes on with the supercharger? Does it still have the clutch to turn it on and off?

Steve

. How are you increasing fuel?

Gonna run stock to start with and watch the Exhaust Temp and A/F ratio. and then if running lean I will.......answer this.....


Extra injector that goes on with the supercharger?

Yeah, I have a extra injector and fuel rail that will turn on at 3 to 5 lbs of boost (still have to buy that switch) and it will run 100%. It is designed to fit into the intake directly in front of the throttle body and blow the "mist" straight in. The injector is a stock 2.2 1991 injector.

Does it still have the clutch to turn it on and off?

Yes, but I am not sure yet how to hook it up. Mercedes has had it set up so it will not engage if the throttle is pushed from an "idle" but the rpm is over 3k as this will snap the belt. God knows how many times an hour I let up on the gas and then press again. Basically I will just have it hooked up all the time and work backwords. FUn , Fun, fUN, fuN.

very cool, lets see pictures

It sucks my crappy digital died so I will only be able to put up finished pictures when I borrow my brothers camera. But at least there will be some pictures.

I love my brother, he does all my computer crap, my business web site, fixes my computer, hosts my pictures and so on.

I in return rebuild his entire front steps in 2 hours, fix his car (when he lets me) and anything mechanical.

He's genius, I'm genius, just not in the same fields. OK, we are just smart.

The Eaton Superchargers that are used on the Mercedes-Benz are very well built and designed... It sounds like you got a very good deal on this unit...

sure did! I remember eyeballing some eaton's awhile back and saw some hefty prices on them --up to two thou! yeesh. gotta hand it to you, douglas, you are pretty smart. Don't think i could even begin to fab or imagine half the things i've read about you doing around here!
Nice work, there, pioneer!

-=tris

This sounds really awesome, Douglas. I'm really looking forward to seeing the pictures of how you mounted it.

On the Benz, the supercharger bolts directly onto the intake manifold, right? So you'll have to make some kind of end tank?

Does the clutch look anything like an air conditioner compressor clutch? My guess would be that it would work the same way; you apply power to the clutch to engage the Kompressor. If that's correct, for the time being you might just connect it to a switch in the passenger compartment and then later come up with some appropriate controller.

This type of supercharger doesnt bolt directly onto the intake like the 3.6 liter GM styles. It has a cast aluminium intake and a cast aluminium exhaust that hook for the intake and exhaust that goes to the throttle body.

Update 7/2/04

I installed the belt just now and it works! I just stood there going "cool!" While the supercharger is just hooked up to the belt to see if it worked, it was still awesome to see it work and blow that air! It even sounds cool although my damn exhaust drowns out the supercharger sound. Rev the engine and put your hand over the exhaust pipe and just grin!

Next step is to fabricate the ductwork/piping and air filter set up. So close!

very awesome, makes me want to rethink my supercharger project

Where are you in PDX?


Id really love to come look at it in person sometime.

My shop is in SE on woodstock and 54th. PM if you want my phone #

Makes me think about going this route instead as I have the block now.

Steve

Yeah, Steve, I was just thinking that too! You've got the block for high-pressure supercharging now. And you won't have to mess with the underside of the car!

pictures in original post now!

awesome, but how are you running the tubing? are you having the maf right after the charger? did you look at this thread: http://bbs.legacycentral.org/viewtopic.php?t=17478

The picture set up is completely non fucntionale. ie, the supercharger blows but there is not connection from it to the intake. This was the test photo.

Next step is maybe tommorrow going to the muffler shop and having them fab me my intake. If I have time. Damn, I want some time!

hehe okay. still cool as hell.

As for the placement of the MAF, I am going to try it pre-throttle body. Why? Cause there is not turbo heat! The minimal heat from the supercharger should not fry the thing (I hope!) And since I will be trying this for just a short jaunt, I hopefully will not be doing any major damage *but I do know damage can be done in about 1 second!

isn't the maf normally pre-throttlebody? anyway, I assumed you meant post-charger. I think it'd be prone to failure if it was post charger, esp with it being that close to it. but hey, we'll find out soon

With that mounting location (its great not to have ABS, isn't it?) you could even probably add an intercooler fairly easily.

I hope you don't mind, but I saved your pictures as reference. I know someone who owns a machine shop so fabbing shouldn't be too bad. I'm really starting to consider this. I could even take the belt completely off in minutes if say I was driving long distance and just wanted to save gas. Hm, I'd maybe need a functional hood bulge to clear it. That's exactly the type of subtle thing on an otherwise stock car that I think would be perfect.

Steve

Wow, that looks really great. I'm very impressed.

I disagree with you about putting the MAF where you want it, though.

It's true that there's no turbo, but this roots-type supercharger is very inefficient; the air it pushes out is going to be a lot hotter at any given boost pressure than the air coming out of a decent turbocharger.

Not only is that potentially going to push the sensor's heating/sensing elements beyond their rails, but you also risk permanently damaging the sensor.

I think you should try to have the air tubing done such that the MAF sensor is before the kompressor the first time, because MAF sensors aren't always easy or cheap to find.

There deffinately not cheap. But this whole before or after the charger MAF placement issue made me wonder. One of the hot wires in the MAF is for intake air temp right? Does hot intake air retard timing? If so, wouldnt after the charger be a good Idea?

How much heat you think a roots blower produces?