3.0 MFI Port Size Advice Needed

[rst73]

MY KEYBOARD IS BUSTED, HAVEN'T GOTTEN AROUND TO GETTING A NEW ONE. YOU KNOW CHRISTMAS AND ALL.

ROGER

[Bobboloo]

I just have to hop in here. I've got to much in common with this thread.

First off:

[Bobboloo]

I've seen Kurt's Starnes' setup. It sure is purdy. What a great guy too.

We were having this discussion on the PP board. I remember one poster saying that the ports on the head were 39mm on the intake same size as the Carrera 3.0CIS motor. He read that in a book by Paul Frere I think. But I think Schmit is right, it makes more sense. For a street car the 36mm intake will give you more low-end punch.

That the MFI is identicle to the 2.7RS makes sense as well since the car was built just for homologation purposes. The cost for redesigning the intake for so few cars just doesn't add up. After all most of the 3.0RS cars were going to be converted to RSR spec anyway.

What are your plans for the car? Track or street. Both?

On your 300TE have you had problems with the tranny? I find I have to change the fluid every six months because it's spent. Inevitably there are little bits of clutch in the fluid. It's driving me nuts. I think MB may have underdesigned the cooling on the tranny so I'm adding a cooler.

[Neunelfer]

I have a friend who has a set of Max moritz 3.2's with the early 39mm SC heads that are ported like no tomorrow. They're gorgeous and tempting but I still think that 36mm will be the way to go with S-Cams. I scoured BA's spec list and it looks as though the factory "never" went over 36mm with S-Cams. Just trying to fond out if the Max Moritz 3.2 will accept pocketing now.

With my wagon I've had the standard tranny pump leak even though I constantly use the emergency brake before leaving it in park. I've had to replace the modulator on the side of the tranny but that wasn't that big of a task. Just a little tight up against the frame member. So I'd have to say no huge tranny problems. I replaced the plastic necked radiator and went through a ton of components trying to find what was a computer problem. Mercedes ended up paying for 1/2 on (at that time) a 10 year old car! Local rep was a great guy.

I saw on the pelican board that you're moving towards the same type engine... yes?

[Bobboloo]

I've contemplated a 3.0RS for years. It's still on my list. Right now I have a 2.4T MFI that I have to put back together for my 72' Coupe so I can sell it. The case, rods and crank should be coming back from the machine shop soon.

Next I have all the parts minus the pistons for a 2.7 or 2.9RS motor. I've got a straight and solid 74' 7R case rebuilt heads ported to 36mm in and 35mm out. S magnesium MFI setup. I just haven't decided on which P+C's.
I was going to bore a set of 90mm cylinders I have to 92mm and plate them in Nikasil to make a 2.8 RS motor but then I found out U.S. Chrome wants $1260 to do the job. Add $1000 for the JE pistons. That's $2260. Hell, I can get 2.9 Mahle P+C's for $2500.

The alternative is 2.7RS Mahle P+C's for $1650. Which I may do anyway if I can't find a 2.2S motor for my Targa. That way I'll put the 2.7RS motor in the 71' Targa. I think the 2.9RS may be a bit much for the 901 tranny.

That means I'll have to build a 3.0RS for my Project Car