280e euro mif eaton m45 - PeachParts Mercedes-Benz Forum

JUNAID786 · #1 01-08-2013, 02:30 PM

Finally finished put everything together. Making too much boost though. Boost guage says 0.8 bar. So I took everything off till I get a wastegate to control the boost. Its not perfect, I know. But bear in mind I did everything in my own garage with no previous experience.

fha772 · #2 01-08-2013, 02:33 PM

Have you got any pictures of your crank pulley?
That's looking good!!

JUNAID786 · #3 01-08-2013, 02:51 PM

My standard crank pulley has an extra slot. I'm using that. It works. I did not have to remove the aircon or anything. Will take a picture tomorrow and show you.its dark here now. Isn't yours the same? I even bolted my mounting bracket to the side of the aircon unit. Its like the car was made for this mod. I used a size 484 goodyear gatorback belt. Oh. The standard pulley on the m45 was a multigroove pulley. I welded on a poly v that a friend who owns a engine shop gave me. It was from a mitsubishi tredia or something. Really old wheel. But It matched the size of the pulley on the supercharger so I cleaned it up and welded it on.

fha772 · #4 01-08-2013, 02:58 PM

I'm planning to copy this setup, that's on a G Wagen engine, but I'm going to use a smaller crank pulley.
As you can see, they've used the complete M62 supercharger, alternator, tensioner, and mounting bracket, from a CLK230, then made a multi groove crank pulley, to drive it all.

I've not got air on on my 280E, as its 1 of the things I stripped off while making it lighter.

JUNAID786 · #5 01-08-2013, 03:07 PM

Interesting. My car needs to go on a diet too. I admit, I did things very short cuttish. I'm actually surprised it works so well. Too well. I was always told the poly v belts slip tremendously for this type of application. I'm not even using a tensioner. I just made the mounting bracket adjustable so I can slide it up and down if I want to take out slack on the belt.

fha772 · #6 01-08-2013, 03:17 PM

Yes, my car has been on a bit of a diet...

...it's lost about 400-450kgs.

JUNAID786 · #7 01-08-2013, 03:38 PM

Omg you've been robbed!! Hehe

Strife · #8 01-08-2013, 09:01 PM

Quote:

Originally Posted by JUNAID786

Finally finished put everything together. Making too much boost though. Boost guage says 0.8 bar. So I took everything off till I get a wastegate to control the boost. Its not perfect, I know. But bear in mind I did everything in my own garage with no previous experience.

I've got to be honest - it ain't pretty - but it does apparently work! You are probably losing a significant amount of efficiency at the outlet of the blower; I've seen a (very expensive) aftermarket casting for the bottom of an M90 that was more like a funnel. But again, if it works - it works!

I dream of doing something similar with an Eaton M90 on a M116 engine in an SL. But my challenges are different. I have no side or "bottom" room; the only thing I can really do is make a new sheet metal intake manifold, and then I have to weld-up a fairly amazing curve at the back (yours is absolutely inspirational) to deal with the throttle body.

I'm surprised that you got apparently good results from welding on the pulley, and with a V-belt, yet - but that smaller blower might not take as much to turn, and it might not be engaged all of the time (are you using the clutch - I assume that you got the blower from an SLK? (an Eaton M45?). Generally, we would see M45's used from SLK's here, M62's from early 90's GM cars, and M90's from later 90's GM cars).

In the US, virtually all of the MB cars we got in domestically after the early 70's or so had air conditioning, and after 1968 or so ALSO had nasty AIR pumps - which kills the two best places to put a supercharger.

Strife · #9 01-08-2013, 09:12 PM

Quote:

Originally Posted by fha772

Yes, my car has been on a bit of a diet...

...it's lost about 400-450kgs.

I have read the the W107 can lose hundreds of kilograms with nothing but hand tools and your hands, becoming amazingly quick in the process; "beater" W107's are used in Europe by street racers. But I've never seen photos of one.

I'm not sure that I want to!

DieselPaul · #10 01-08-2013, 11:51 PM

Why the kink in your charge piping?

Are you doing anything for fuel enrichment?

yzn · #11 01-09-2013, 06:23 AM

keep it at 0.8 bar

boost is very sweet thing just need an intercooler ,it will fit behind the grill in front of the radiator .
how do you control fuel under boost?

JUNAID786 · #12 01-09-2013, 06:38 AM

Its an m45 from a mini cooper s. The kink was coz of the charge pipe being too long. I have cut the pipe shorter. Only thing I have for fuel enrichment is an aftermarket rising rate fuel pressure regulator. Thing is, I have not road tested it yet coz the fuel system can't take that much boost. It can take 6psi max. So I dismantled the whole thing and waiting to have enough cash for a wastegate.

JUNAID786 · #13 01-09-2013, 06:41 AM

Going to put this on after its done

duxthe1 · #14 01-09-2013, 01:31 PM

That aftermarket rising rate fuel pressure regulator isn't going to enrich the fuel under boost. CIS fuel systems don't work like that. You will actually need a LOWER control pressure under boost to get enrichment.

JUNAID786 · #15 01-09-2013, 02:54 PM

The fuel pressure regulator definately works the way I want it to. Its been on for a while now. Its just not going to increase fuel pressure enough for a lot of boost. The standard WUR lowers control pressure allowing the airflow meter to move down more freely. This means it can accomodate up to 2psi above atmospheric air pressure. The fuel pressure regulator increases fuel pressure at a 1:1 ratio. Which means 1psi fuel for 1psi boost. In my simple understanding, it takes 10psi extra fuel pressure to change an air/ fuel ratio from 14.7:1 to 12.5:1. So I theorise that after 3psi boost, the ratio will start to go lean. But if I adjust the lambda tower a quarter turn or two. Then I could make it handle 4psi of boost.