Chomanche

Im wondering how well the m156 takes to being blown. I do undestand that it will increase wear and tear on the motor but im curious as to the luck other members have had. My biggest qustion is duribility, has anyone grenaded an m156 with too much boost? What type of majior issues come to the surface? I am planing on removing the engine and giving it a through once over, rings, bearings, head studs, m159 buckets, and anything else thats questionable when it gets a blower. What kind of longevity can i expect? Will i want to take it out back and shoot it?

e500slr

Brother, you need to calm down We can work this out, no need to go blowing things Whatever beef you have with this engine doesn't mean you need to grenade it. Tell us where you are so we can help you. It seems like you have had a bad day but don't go do something you'll regret Let us talk to the engine, we need proof of life before we continue to negotiate...







I'm just ****ing with you. Talk to JRCart, he has the most powerful M156 in the world, I'm guessing he probably knows a thing or 2 about blown M156s

hachiroku

its a strong engine. Weistec has a killer supercharger for the M156 Engine

Shifter

Check out the C63 page, lots of guys there have supercharged theirs with no issues.

Yacht Master

Just drop the compression, and the reliability and HP will improve with FI.

Chomanche

Does any one sell a thicker head gasket? It would seem weistec is the only real source of aftermarket internals? Plus its difficult to swallow when you can get a detroit 6-71 supercharger for 3k. How ridiculous would that be. Cut a big old hole in the hood, maybe even convert to some holly four barrels, lol. The weistec kit does seem to cover every base though. But plan is limited slip, long tube headers, engine/trans refresh, supercharger. I have to drop my car off next week for hail damage and re paint. Prolly wont bring it out till spring as winter is just begining in Colorado.

Sir-Boost-a-Lot

iTrader: (1)

Sounds like you've got it all figured out dude, good luck with it

e500slr

I'll be honest with you, it's not worth building the motor with Weistec internals unless you're planning on getting massive numbers. JRCart is making 1000whp in his CLK63 Black Series. It's the fastest Mercedes on the planet and he spent alot but he needed those parts for that much power. How much is an M156 long block where you are? If you spend money on a built M156 and don't need to then you're just wasting money IMO. I'm not suggesting that you blow several motors and just continue to swap blocks but those motors can take alot on the stock block. I think you should focus on the head bolts and the transmission though.

Chomanche

Honestly blowing up the engine is the last thing i want to do. If i could prevent any failures from the added stress beforehand that would be great. It might sound insane but i truly do belive the best of both worlds can be had with it. 1000whp would be awsome, but 600-700whp would be pretty cool too. Plus if it was still able to cruise long distance i would never want another car. At what point does reliability go out the window.

e500slr

You're still not giving us context. Ho much do you want to spend. You say 1000whp "would be awesome" but 600-700whp "would be cool to". That's not really a clear goal. Those 2 figures are extremely far apart. For 1000whp you would have 2 take most of the Weistec catalog. You also have to include labor in your costs. For 1000whp you'll need race heads, LSD, bulletproof transmission, forged pistons......etc.

Look at how much the forged pistons are......they cost around as much as you can get an M156 motor in the US. That's without labor. They're $6089. So you have to decide how much you want to spend. The difference between 600-700whp and 1000whp is ALOT of money. I think JRCart has spent 100k+ so far on his CLK63 Black Series It's full of custom parts like CF driveshaft and other drool-worthy parts

Chomanche

100k is a bit out of my range. Im already planing on starting from the back forward. Lsd, long tube headers, trans work, engine refresh and supercharger in that order. Plus it would be awsome to see how the car progresses. Im not to worried about labor, im pretty crafty and a certified benz tech. Really it would seem 20k could get the job done, with the supercharger kit being the most expencive piece of the puzzle. As far as i can tell it would be most effective to just skip the ecu tune and put that money toward the supercharger kit. Im just curious if anyone has slapped one of these kits on and driven 60k miles. What psi were you running? How often did you call a tow truck? I bought this car cause i always knew it was the one for me. I know theres a big difference between 600 to 1000 hp but i wanna be able to pick my kids up from school and see what kind of numbers she'll post at 5800 feet above sea level.