Benzmac's 190E 2.3 16v TURBO ! - Page 4 - PeachParts Mercedes-Benz Forum

Glen · #46 11-15-2002, 07:44 PM

Thanks Benzmac...that makes perfect sense

Michael · #47 11-16-2002, 07:41 PM

Benzmac,

Are you sure? Have you thought all this through?

(Hehe - just making sure you're current, Donnie. Donnie da Man)

Signed, Curcio

Benzmac · #48 11-16-2002, 08:58 PM

Dan,

The stock head gasket is like an engine fuse. If you put in too much, the fuse will pop and save the motor most of the time.

I installed studs on the block to hold the head down tight. I think that is the key.

To quote Corky Bell. "Studs are an engineering decision, bolts are an accounting decision."

Dan16V · #49 11-17-2002, 10:17 PM

Ahhhh, that makes sense! I know wisdom when I hear it!

That just made up my mind. Oh, what kind of wire did you use for the o-ring? Copper, stainless, music spring? What wire size and how far does yours stick up above the deck?

Thanks so much!

BTW, I'm really making progress on my intake. I'll post pics shortly!

Later!

Maddog · #50 11-18-2002, 04:18 PM

I used copper wire. I am not sure of the height above the deck though.

I went down to MB Autowerks last weekend and I saw the 16V up on the lift....man that is a sweet car. I would love to see that thing fly. I hope next time I go down there...to pick up a car, it will be off the lift so I can see the engine bay from above.....hehe

Clinton · #51 11-18-2002, 06:37 PM

OK thanks Benzmac,

I wonder why the wastegate is not functioning then.....b/c the vacuum line is connected directly to the wastegate. However, b/c of the position of the turbo (Under the manifold) and the size of the manifold, it was a very tight squeeze between the turbo and the motor mount and the position of the vacuum line nozzle on the wastegate and compressor led me to purchase some vacuum line adapters in a "L" shape. They were flimsy and maybe the vacuum line was too tight for the adapter opening that it closed it up? Hmmmm........as you can see, I"m pretty desperate here hehehehehe. but after dumping $4K into the car for this turbo kit and not being able to use it is very very depressing as you can imagine. Plus, $$ doesn't exactly come quite easily for me.

Also, I will note that the rod on the wastegate (The one that is supposed to be adjustable via. screwing or unscrewing the nut) is welded to where it is not adjustable and I wonder why. Maybe Mosselman did this to reassure that you cannot boost over 5.5psi. Too bad I'm boosting at 10psi.!!!!!!! Anyway, Dan16V, I remember when you were in the process for doing the EVo II kit on your car......I'd like to see it. Well, take care everyone and thanks for the info. Later.

Clinton Davis

Benzmac · #52 11-18-2002, 07:24 PM

The line is NOT a vacuum line. It is a high pressure line seeing spikes of 15psi and more. I would take off the flimsy, pressure reducing adapters and try to go straight. I used -3 braided.

Clinton · #53 11-18-2002, 07:30 PM

Dear Benzmac,

I was wondering........you have an external wastegate installed on your turbo 16v and I understand how it works.......the exhaust gasses passes through the wastegate once it opens up due to boost pressure readings from the compressor housing. This releases the pressure from going to the turbine housing and spinning the blades in the turbo. So, my question is......is how does an "internal wastegate" work? B/c On mine......there is no "bypass" connection to the exhaust downpipe from the wastegate. The wastegate is only connected to the turbine housing (exhaust side)....not to both the turbine and downpipe, like yours. Thank you again......later.

Clinton Davis

Maddog · #54 11-18-2002, 07:53 PM

With an internal waste gate, the waste gate vents the turbine housing. I have attached a picture to show how it works sort of. There is a valve on top of a hole in the turbine housing. When you reach the desired boost pressure, this valve opens and vents exhaust. With an internal waste gate, the exhaust is vented just to bypass the turbine. It goes into the exhaust system right after the turbine wheel. The little whole in the picture is the venting hole. normally, there is another peice that covers this side of the turbine housing up and the exhaust bolts up to that. I don't know if that makes a lot of sense...but i hope it does.

Clinton · #55 11-18-2002, 08:36 PM

Thanks Maddog,

So, that small hole is on the compressor housing (intake side) or the turbine (exhaust side). You said in your post.... "With an internal waste gate, the exhaust is vented just to bypass the turbine. It goes into the exhaust system right after the turbine wheel." If it goes into the exhaust system right after the turbine wheel, won't it still have affect on the turbine wheel thus creating more boost? I'm a little confused as to your explanation but I get confused easily so, I'm sorry about that........I think I got most of it just that one statement confuses me is all.....thanks again.

Maddog · #56 11-18-2002, 08:59 PM

Okay, lets see if I can do a better job....

that vent that I showed you is on the turbine side of the turbocharger....that is the exhaust side... Normally, the exhaust enters the turbine housing(exhaust side) through the part of the turbocharger that is facing down in the picture. The exhaust gas is then routed around the outsides of the turbine housing and eventually over the turbine wheel to spin it. Now, the internal wastegate is just a vent in the exhaust housing. When the wastegate opens up, instead of the exhaust going around the turbine housing and then over the compressor wheel, some exhaust will go straight out of that vent in the turbine housing while only some of the exhaust will go over the turbine wheel. A wastegate controls the speed of the turbine wheel(exhaust) and thus the speed of the compressor wheel. A wastegate is just like a vent to control how much exhaust is actually getting to the turbine wheel. When enough exhaust is getting to the turbine wheel to spin it fast enough to produce enough boost, the waste gate opens and vents out the additional exhaust gas controlling how much actually gets to the turbine wheel. I think howstuffworks.com may have some good diagrams if that isn't clear enough. I hope thats a bit better...looks like a lot of writing to me!....lol...

Clinton · #57 11-19-2002, 05:22 PM

Ahhh ok Maddog,

I gotcha when you say that the wastegate opens up and lets some exhaust on the turbine wheel and some goes directly to the downpipe right.......and on the internal wastegate, the unneeded exhaust passes through this hole that you showed me in the pic? I see......hey thank you very much maddog.
Benzmac, I may try to go straight line but I may have to remove the turbo b/c it is such a pain in the arse to get to from above. I don't have a lift either. Right now, I'm just planning to go see you at the shop. Well, take care.

Clinton Davis

Maddog · #58 11-19-2002, 05:32 PM

Tell me when you are going to see him, I wanna meet the man who started 190E discussion forum...

Clinton · #59 11-20-2002, 04:36 PM

hehe,

OK maddog, do you live in that area? Also, I just started frequenting the new 190 Revolution message board that is now set up. It is looking really nice. I wish I could've had alot of time to keep up with the site but it is neat to sit back and look at how much it has grown. Anyway, I'll let you know when I head down there. Well, take care.

Clinton Davis

Maddog · #60 11-20-2002, 06:10 PM

I live in sandy springs...the north side of Atlanta