Is it possible to upgrade an M273? What do you think?
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Is it possible to upgrade an M273? What do you think?
How are you? I'm opening a debate. Do you think it would be possible to mount a manifold with CL 63 AMG injectors to boost the M273? Maybe an E55 compressor? I think this engine can give more. I read a while ago that it was somewhat limited so as not to overshadow the CL600, S600.
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2014 S63 2010 ML350 Bluetec 2009 SL550
Doubtful...very few aftermarket firms have taken on modding this motor. The obvious reason is that there are many other more powerful MB motors to pick from if power is your goal.
With the sky high compression ratio, going to forced induction is not a good idea. Keeping it NA normally means heads and cam. Point me to a source for upgrades...don't think there is one.
About the most you can do is exhaust so you can hear it (and it does sound great uncorked).
If you think about it, the M273 is comparable (a little less HP but more torque) than the famous 4.9 in the E39 M5 that everyone was gaga over 20 yrs ago. It's also way more reliable and less fussy , while using a lot less gas. It's a great motor and I love driving our SL every chance I get. But I accept that this is not an LS or B58 . There's basically zero aftermarket support for it and that's OK. I didn't buy it to hot rod it and I am sorry if you did.
With the sky high compression ratio, going to forced induction is not a good idea. Keeping it NA normally means heads and cam. Point me to a source for upgrades...don't think there is one.
About the most you can do is exhaust so you can hear it (and it does sound great uncorked).
If you think about it, the M273 is comparable (a little less HP but more torque) than the famous 4.9 in the E39 M5 that everyone was gaga over 20 yrs ago. It's also way more reliable and less fussy , while using a lot less gas. It's a great motor and I love driving our SL every chance I get. But I accept that this is not an LS or B58 . There's basically zero aftermarket support for it and that's OK. I didn't buy it to hot rod it and I am sorry if you did.
Senior Member
Joined: Apr 2023
Posts: 473
Likes: 300
2014 S63 2010 ML350 Bluetec 2009 SL550
If you do a lot of digging you will find some parts for it. Like this:
https://catalog.kleemann.dk/catalog/...00550-v8-m273/
I even found some mention of a kleeman supercharger kit. But I will bet any amount of money that it would be cheaper (and just as fast) to just buy a Benz with a more powerful motor. Like the M113k or M156 for the older cars, or M278/M157 on the newer side.
https://catalog.kleemann.dk/catalog/...00550-v8-m273/
I even found some mention of a kleeman supercharger kit. But I will bet any amount of money that it would be cheaper (and just as fast) to just buy a Benz with a more powerful motor. Like the M113k or M156 for the older cars, or M278/M157 on the newer side.
