Will a w123 diff fit a w115? - Page 2 - PeachParts Mercedes-Benz Forum

79Mercy · #16 01-04-2010, 10:09 PM

In europe there was no such thing as a 300D, they were called 240D 3.0
(OM617.910). Im not sure if they used the M-pump or not. I know the Euro W123 300D's(OM617.912) used the M-pump. I'll see if I can find a picture of the euro pump.

79Mercy · #17 01-04-2010, 10:13 PM

This guy is selling one

617 Injector pump. M-Pump

bgk202 · #18 01-04-2010, 10:42 PM

Does anyone know what ratio diff a 75' 300d w115 would have come with? Somebody said that it was a 3.46

79Mercy · #19 01-04-2010, 10:44 PM

yep, 3.46

diametricalbenz · #20 01-04-2010, 10:55 PM

Quote:

Originally Posted by 79Mercy

In europe there was no such thing as a 300D, they were called 240D 3.0
(OM617.910). Im not sure if they used the M-pump or not. I know the Euro W123 300D's(OM617.912) used the M-pump. I'll see if I can find a picture of the euro pump.

That is a good question, it was the first generation of the 617 so the pump might be an "M". It would be pointless to inject more fuel without getting more air to the motor.

And yes I concur, it is a 3.46.

DeliveryValve · #21 01-05-2010, 12:34 AM

Quote:

Originally Posted by bgk202

Any differences besides the possible input flange? Do they have the same housings /and or mount up the same way?

They might have the same housing or a little bit of a variation. But definitely mount up the same way.

One note though is the w123 3.07s have a 115 housing part number.

.

wolf_walker · #22 01-05-2010, 12:35 AM

In the later cars, w123's, there is also a differing pump for the manual trans cars. I forget what the difference is but the converted manual trans 617 turbo's I drove were.. funny feeling, between gear changes in particular. Just a tidbit.
I miss having a Merc diesel. I should put a 617 in this w114.

t walgamuth · #23 01-05-2010, 06:35 AM

Quote:

Originally Posted by diametricalbenz

Is that the Getrag or did you mate up a different transmission?

I presume you mean accelerate without downshifting on a level grade?

It is the factory tranny offered in the 123. I am not sure if it is getrag or not. mine has the all aluminum housing. Yes, accelerate without downshifting.

t walgamuth · #24 01-05-2010, 06:38 AM

Quote:

Originally Posted by 79Mercy

In europe there was no such thing as a 300D, they were called 240D 3.0
(OM617.910). Im not sure if they used the M-pump or not. I know the Euro W123 300D's(OM617.912) used the M-pump. I'll see if I can find a picture of the euro pump.

The euro 300d that I parted to get my motor said 300d on the trunk. It was an 83.....so I think there was more than one way of doing it.

79Mercy · #25 01-05-2010, 08:37 AM

Quote:

Originally Posted by t walgamuth

The euro 300d that I parted to get my motor said 300d on the trunk. It was an 83.....so I think there was more than one way of doing it.

Sorry i mean't to say.

In europe there is no such thing as a W115 300D, they called them 240D 3.0's. However they called the W123 the 300D.

diametricalbenz · #26 01-05-2010, 09:35 AM

Quote:

Originally Posted by wolf_walker

In the later cars, w123's, there is also a differing pump for the manual trans cars. I forget what the difference is but the converted manual trans 617 turbo's I drove were.. funny feeling, between gear changes in particular. Just a tidbit.

Did the conversions have a 240D flywheel as opposed to the 300D flywheel?

Quote:

I should put a 617 in this w114.

That's exactly what I ended up doing since I liked the chassis so much. I am VERY curious as to how it drives since it's not 100% complete yet.

wolf_walker · #27 01-05-2010, 06:40 PM

Quote:

Originally Posted by diametricalbenz

Did the conversions have a 240D flywheel as opposed to the 300D flywheel?

That's exactly what I ended up doing since I liked the chassis so much. I am VERY curious as to how it drives since it's not 100% complete yet.

I had the fortune of driving one of both actually, though briefly. One was a converted 4spd w123 300D (turbo) and one was a real NA w123 300D with a 4spd. I believe the owner said the driveline other than the engine in the turbo car had come from a rusted up or wrecked euro car, so it was the correct flywheel. I'm aware of the statements in the FSM about that, but a lot of people had used the 240D piece(I think it was) and seemed to not be having catastrophic failures with some reasonably lengthy testing. Unless one is really lucky or has a bunch of coin to toss at it, is about the only option as the euro 300D manual flywheel was few and far between, least back a few years when I was looking. The two cars drove quite differently though, both were MUCH preferred over the auto, but the euro car felt more suited. I'm pretty convinced it was largely pump calibration that anyone well Bosch trained could mimic with some thought. I'd love to hear about your conversion, I've been batting the idea round on my 280 pretty much since I opened the hood the first time. It's too nice to let go, or sell cheap, and nobody wants the little M110 cars unless they are almost free, so. It's going to get something done to it this spring.

diametricalbenz · #28 01-05-2010, 11:31 PM

I drove a Euro 300D with three people in it in San Diego three years ago and it felt like it had more power (88hp?) than a turbo 300D with (~125hp) I don't know what it was but it felt like it had more punch and better overall drivability.

My list of cars has a link to the gallery which explains what I had done to my car since it was way out of my league in terms of fabrication. The toughest part to find was that 300D flywheel which took 2 years to find. I know Tom will argue that it makes it buttery smooth with the extra weight so I do hope that the net result on my car will make it well worth the wait.

Anyhow back to differentials a 2.47 differential (if one could be found) would theroetically allow 135mph at 4432rpms.