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What are the differences between the "regular" m157 engine versus the m157 engine with the power package? Is it only the turbo bars increased the 1.3 on the pp?
If i recall, the m157 pp had forged internals, is that true?
2008 Saab 93 TurboX SC (BSR stage 1)/2014 E63 S Wagon (Rebellion Tuned/Renntech Sport Mufflers)
Originally Posted by EVOII_Racer
Hi amg fans!
What are the differences between the "regular" m157 engine versus the m157 engine with the power package? Is it only the turbo bars increased the 1.3 on the pp?
If i recall, the m157 pp had forged internals, is that true?
Thanks a lot in advance, guys and girls
I know the 6.3 (M156) had different internals in the PP version (forged vs cast) but I don't know about the M157... good question! I'm sure somebody will know.
The engine iteself is the same across the model line that uses the M157- the difference as said by M0V3v3r is in the boost from 14 psi and change to 18 and change.
On some models its even more- whats interesting is the S car gets 590 lb/ft tq in the CLS and E but my SL gets 664 tq yet I get less hp at 557---- and you guys get 570+ right? (2014 models)
i look at it that the flagship models (S/SL/CL) always get the more hp/tq over everything, although the new S63 has the same hp as my 63, but a lot more tq. your SL has more hp than the 2013 E63, i dont think they will give it a power bump until the refresh body.
I've held it as known that we have cast pistons, but I cant find a source. Forged pistons are tricky to make work quietly, and even with the cast-in liner design, I would be surprised if they chose forged pistons.
The rods and crank I will assume are forged.
I would imagine the S-class has a different power curve than the E-class because of exhaust backpressure, which is probably different between the cars. More back pressure would mean more torque and less HP if it was otherwise optimized.
FF. W212 E63 M156 non-pano 18" P2 ParkT NightV (gone but will be missed).
MBUSA's website has it wrong for the SL63 at 530hp/590lb-ft. They obviously need to tune it differently and with different boost to make the customers feel better when paying more. If not, the output of a S63 and a C63 would be the same back in the days when both were using the M156. That would be awkward.
Hi everyone I am Sleeving my engine with Darton 900-600 MID Sleeves. The questions is will the stock pistons work in a ductile iron sleeved block? I believe the stock pistons are forged? What about the rings? Do they need to be upgraded? I was trying to find the aftermarket Pistons for M157 engine and had no luck. Anyone? Any recommendations?
The stock car comes with aluminum engine block with forged pistons. When you damage your engine due to knocking and detonations, the cylinders and pistons get scratches. Therefore there is low compression and your engine needs 1 litter of oil per 100 kilometer. Basically your engine is useless, because your engine is knocked. You have two ways: Either you go and buy a new engine or you sleeve your block, modify the cylinders with iron sleeves. Attached picture.
When you install the iron sleeves you need forged pistons and special rings that will work with iron deck and I'm looking for those special parts in order to rebuild the engine.
Last edited by Goletiani; May 23, 2015 at 01:17 AM.
Total seal rings work well with cast iron. Do not use them on Alusil. Had to learn that one the hard way many years ago.
There are other ways too but I think your method is best. The other methods are to bore your engine slightly, have it honed with a Sunnen machine, and custom tin/ferro cote pistons from Mahle or Kolbenschmidt. You can also have your bore coated in Nikasil and use a regular uncoated aluminum piston.
Total seal rings work well with cast iron. Do not use them on Alusil. Had to learn that one the hard way many years ago.
There are other ways too but I think your method is best. The other methods are to bore your engine slightly, have it honed with a Sunnen machine, and custom tin/ferro cote pistons from Mahle or Kolbenschmidt. You can also have your bore coated in Nikasil and use a regular uncoated aluminum piston.
Thanks for your relpy. Im going to send my block to Darton for their MID 900-600 sleeves. Those are made with a ductile iron. I have to find if the pistons will work with a ductile iron sleeved block.
On some models its even more- whats interesting is the S car gets 590 lb/ft tq in the CLS and E but my SL gets 664 tq yet I get less hp at 557---- and you guys get 570+ right? (2014 models)
Advertised numbers, not actuals. The HP to torque relationship is simple math. You can't increase the torque at a specific RPM it hour also increasing the HP at that point.
MB is either understating the torque numbers for the E and CLS or the HP numbers for the SL - unless the power REALLY starts to fall off fast after the torque peak on the SL.
The stock car comes with aluminum engine block with forged pistons. When you damage your engine due to knocking and detonations, the cylinders and pistons get scratches. Therefore there is low compression and your engine needs 1 litter of oil per 100 kilometer. Basically your engine is useless, because your engine is knocked. You have two ways: Either you go and buy a new engine or you sleeve your block, modify the cylinders with iron sleeves.
When you install the iron sleeves you need forged pistons and special rings that will work with iron deck and I'm looking for those special parts in order to rebuild the engine.
A question, is it your engine who has failed with Kleemann K4 due to knocking and detonations (cylinders and pistons got scratches)?
I too was wondering what happened after the Kleeman turbo upgrade and tune. I saw a bunch of excitement and dynos posted, then no updates, then a man shopping for sleeves and pistons. Sorry to hear.... Please elaborate on what went wrong.
FWIW Mahle, if i had to guess, made the pistons for Mercedes stock. They have been making all of Ford and Chevy's forced induction pistons for some time and I know the also supply many other OEM's. They have much experience with the coated piston and bore technology. If indeed they supply the OEM M157 pistons they would be my first call. Hard to say as MB has kept a pretty tight lip on the M157 internals. I can't find much anywhere about them online. Mahle makes a very good piston.
Diamond can make pretty much any piston you need and has an excellent choice of coatings and ring packages available. We have used them in our high boost (35+) and high RPM (9000+) Ford GT race engines with both sleeves and coated bores. Expect to wait a good 6-10 weeks though.
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