Quote:
Originally Posted by whipplem104
Honestly the new stuff is great for power vs size. But I would not use them. They are horrible to work on and expensive. And you have to have a lot of equipment to do keys and what not to be able to make new keys. People pretty much just abandon the cars after they are around 100k because of maintenance costs. Direct injection motors have terrible carbon build up issues. I am not speaking directly about the m152 but in general. They leak a bit. It is common to have multi thousand dollar repair bills on smallish issues just because of the labor to remove stuff to get to what you want to fix. Also everything in a new car is TRP. I mean every computer. So engine, transmission, ignition, lights, cluster. And when you get used stuff you have to have it virginized and then coded and that has to be done through Mercedes online. Which pretty much means at the dealership.
I am just saying do your do diligence on the product before really deciding to go this route.
The good news is that you should be able to just use the engine and trans by themselvles. You should not need ABS etc. The 722.9 has output speed sensor. So it works by itself. You will loose some mode options though without it.
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Thanks for the reply. That's the kind of info I'm looking for and kind of what I expected.
I know you and me have done back and forth about OE vs aftermarket systems and the pros and cons. I don't see much of a way out for the newer engine trans combos than to go OE, which once again means taking the whole car and transplanting all systems as I did with the M120. But that looks like child's play compared to the new engines. At least this time I know what I'm about to step in.
For the moment I have an M113 I'd like to fit in as that represents something doable by most of the people on this forum, and there is the option of choosing OE or aftermarket and even supercharged versions.
I am currently designing the subframe modeled after the one I did for the V12 and I believe the opportunity is there to fit all the newer engines with one frame based on R129 mounting points. So I am looking into sizing the M152, M157 and M278 as well as the M120 and M113. And possibly some 6 cyl variants
It may be that I have to be the guy that develops engine management systems for these engines for the reality of these becoming a practical swap is to come to fruition. But I expect to retire in about 2 years or so, so who knows.
The new direct injection engines are the future
The M152 seams particularly intriguing with its variable displacement technology, but I see its been discontinued. Was it a huge failure like the 70's Cadillac attempt?