cpbeasley

If so... (as I have a m272)
doesn't rentechh sell a 3.8L conversion kit for the m112? Anyone know what it includes? Crank/pistons/rods?

I know, I know, it's a fortune, buy a c55, blah blah.

I'm just curious.

Thanks!

zerocover

If your looking for a stoker kit, Brabus makes a 4L kit for the M272.

Also the M112 and the M272 are not the same block.

cpbeasley

You read my mind (easy to do), thanks zero cover. I'll look into it.

You still planning on swapping out inernals with a 3.5?

cpbeasley

$24,000 ?!?! Are you frikkin kidding me?

Glyn M Ruck

It's a development of the same block but stiffer. They are not interchangeable.

LILBENZ230

You're better off selling it and buying a C55. Such is the case with trying to make these cars significantly faster.

TruTaing

use a 3.7L from a ML

cpbeasley

I had an 11 second LS1 Camaro. Been there done that. Im looking to do something different.

splinter

What prompted you to pilot a C230?

cpbeasley

needed better gas mileage for starters.
the search for something different then began. all the while wanted something sporty, reasonably priced, reliable... had to go beyond Chevy as I wasnt interested in anything they had.
An EX of mine used to drive an 06 c230... it popped into mind.
The creature comforts, including literally the comfortable ride were elements that also won me over. it was also nice to take a break from shifting after 7 consecutive years of it. especially with downtown KC traffic commute.
And now, looking into the near future, when dental school is over in a couple of years, when gas mileage and down time won't be as big of an issue, I'd like to do something fun with it.
I did all my own work on my LS1... including heads and cam swap. So, I'd like to get a little dirty with my C.
Not that you can beat the thrill of over 400 rwhp with the sound of a V8 roaring behind you, but as I said, I really have grown to love this little car and would like to do something different. those being
1) moderately build a V6 (325 crank)
2) work on a DOHC car

will probably swap a 3.5L in, if not trade my way into a C350 car... but swapping one in would be half the fun. and all the while throw in a new set of camshafts from kleemann or bar-tek.
there will be some money and time invested, yes. but a one-off, extremely comfortable, refined ride, also yes.

e1000

Engine swaps in a MB isn't like an engine swap in a chevy. It would be much easier and cheaper to trade up to a C350. Yes it's down a bit on power compared to the C55, but uses significantly less gas, especially when cruising on the highway.

TemjinX2

why dont you just try to retro on a whipple supercharger and just connect it to a off and on switch, so you can retain the stock mpg when you want to drive slow and turn it on when you want to drive fast.

But e1000 is right, doing engine swaps on canbus based engines isn't cheap or easy especially you have to pay the MB tax on parts and labor.

zerocover

+$8000 for installation

Honestly though there are so many 350's rolling around that junkyards are overflowing with them. I would want to keep my stock block to keep the vin numbers matching so just swap the internals and the heads. Some clever tunning work and it should be good as stock. After that headers and cams should have these things moving very nicely.

cpbeasley

+1
Sounds like a plan to me.
Which cars all come with the 3.5L m272 in question?

Term -
Good idea, feasible with same amount of money, probably less time, but I'm a N/A man. Always have been. I prefer the rumble of a camshaft over the roar of forced induction. And something about the motor doing all the work on it's own appeals to me also. Something psychological Im sure.

zerocover

SLk350, C350, E350, GLK350, Ml350, R350. Check for the badge, its entry level above the C/slk class. I'm sure at least someone's totaled one of those with low miles. (also the SLK350 can have 300hp stock due to some factory tweaks)

EDIT: also the dodge sprinter

bdgdl08

Not to mention the SL350 that gets, what, 315 hp from factory mods? Not that you can get that is the US, but that shows potential for the engine.

cpbeasley

finally, some sympathizers to the cause of building an m272 v6 for the fun of it. ive always wanted to build a v6. I bought a salvaged 4.3L for my old 2000 S-10 back when I was 20... but before I got to build it I landed my 02 Camaro SS which quickly diverted my attention

anyway, id rather build this refined powerful v6 than buy some used c55 thats been hot rodded all to hell...
and before id do that id swap in an LS1 with a painless wiring harness and autometer guages and be done with it

splinter

No doubt when you’ve completed dental school you can write you own ticket.
Curious juxtaposition of mechanical ability and medical aspirations. My USC-trained (and former instructor there) dentist’s son went on to build the Blastolene Special and Sneaky Pete.

The C350 was the epitome of W203 development save for Affalterbach’s attempts. The M272 is indeed fine engine. They are rather highly developed as delivered. Far be from me dissuade your MB hot rodding efforts, but incremental improvements are neither inexpensive nor easily achieved. Its chassis, however, is readily improvable via aftermarket offerings and judicious tuning.

€1,949.99 for Schrick DOHC bumpsticks without the requisite hardware? COMP, Isky and Crane have machined my OHV GM goodies for less than a tenth of that investment. Multiply your LS1’s easy horsepower gains appropriately when dicking around with this marque.

FrankW

i think i raced (sort of) a TransAm with LS1 couple nights ago. It was a white one with the ws6 style ram air hood and TransAm badge. looks like a clean 99 or 2000 model. it had a passenger. he down shifted and got next to me after we made a left, so I put it in 2nd around 4500rpm. he floored it, so i followed. he had a half car lead when we started and then I just reeled him in and pulled away. he shout down after I put 2 cars on him. I also slowed down, but he didn't want to go again.

like said you are better off finding a 350 engine instead of putting money into the 2.5L 230's engine.

dearlove

old thread i know,
so they're different block yes, but does anyone know if they have the same external general shape/engine mounts in the same position

you can probably see where im going with this?? fitting a m272 where a m112 once was.

dont hit me with that 'cheaper to go buy a c350 crap' quite simply its not what i want to do

spyder.evo.dev

Is there a way to see if the supercharger from the m112 would work on the m272?

drb930

⬆️ This!