Upgrades to M112 E26

Tui Miller

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Your Mercedes
2001/C240/M112 E26
Hi, i'm new to owning a Mercedes and i'm looking to make more power out of my M112 E26. I've done an exhaust atm and that's it, a new intake and a tune would probably get me more but I know I wont be satisfied unless im making around 300-400HP. I don't know if this is possible from the E26 but if there are any power adders eg. superchargers or turbos that can be fitted for the extra power boost and most likely impossible but i just wanna know if i could even swap the SOHC to DOHC for better performance and tuning. I have looked at the kleeman superchargers but since they don't make them anymore they could be hard to find especially here in New Zealand. I just wanna know if any of this is possible or if i should just do a engine swap or buy a new car for my power needs.

Thank you and sorry if this is a bit of a stupid post
 

Naraic

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2005 CL500.
What's an E26?
 

Naraic

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2005 CL500.
I think me means the E240 has the 2.6l m112 engine...maybe?
 

AnthonyUK

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C240 estate 2002
The M112 2.6 is not a good starting point tbh.
You might as well look for an E320 as a minimum.
 

Naraic

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2005 CL500.
The M112 2.6 is not a good starting point tbh.
You might as well look for an E320 as a minimum.
True...but he could bolt on a supercharger...but, why bother.
 

LostKiwi

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'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
I think me means the E240 has the 2.6l m112 engine...maybe?
Correct.
Same engine we have in our 210.

OP. Your options are:
1. Fit a supercharger from an m112K as fitted to AMG C32 etc. You'll need a custom map and probably an uprated gearbox to handle the torque.
2. Fit an m113 V8 (plenty of space). This will give 302hp and should be relatively easy as you can use the ECU and gearbox as well.
3. Find and fit an m113k engine and gearbox (supercharged version of above).
4. Buy a car with the power you want (E500, E55, CLK500, CLK55, CL500, CL600, CL55, SL500, SL55, SL600 etc).

Any increase in power will almost certainly require a stronger gearbox. I believe the standard gearbox bolted to the M112 E26 engine is rated to 330Nm. V8 gearboxes are rated to 500+Nm and V12 variants to 1000Nm.

It all depends on the depth of your pockets and the amount of hassle you want to go to.
 

Craiglxviii

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970 Panamera Turbo; W221 S500L AMG Line, C215 CL500, W251 R350L AMG Line, plus several more now gone
Correct.
Same engine we have in our 210.

OP. Your options are:
1. Fit a supercharger from an m112K as fitted to AMG C32 etc. You'll need a custom map and probably an uprated gearbox to handle the torque.
2. Fit an m113 V8 (plenty of space). This will give 302hp and should be relatively easy as you can use the ECU and gearbox as well.
3. Find and fit an m113k engine and gearbox (supercharged version of above).
4. Buy a car with the power you want (E500, E55, CLK500, CLK55, CL500, CL600, CL55, SL500, SL55, SL600 etc).

Any increase in power will almost certainly require a stronger gearbox. I believe the standard gearbox bolted to the M112 E26 engine is rated to 330Nm. V8 gearboxes are rated to 500+Nm and V12 variants to 1000Nm.

It all depends on the depth of your pockets and the amount of hassle you want to go to.
From memory the 722.6 5 speed auto on a V8 or V12 is rated to a gnat’s nadger over 1000Nm. Hence why they continued fitting them to the AMG cars after the 7 speed was introduced, with its internals made out of particularly stiff Parmesan.
 

LostKiwi

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'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
From memory the 722.6 5 speed auto on a V8 or V12 is rated to a gnat’s nadger over 1000Nm. Hence why they continued fitting them to the AMG cars after the 7 speed was introduced, with its internals made out of particularly stiff Parmesan.
Normally aspirated V8s use the WA580 variant of the 722.6 which is rated to 580Nm.
 

LostKiwi

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Well I never!
Next time you're under Gunther you can check - it's stamped/cast into the casing. It will appear as W5A580.

OP yours will be marked W5A330 as I'm certain it's the lower rated gearbox on the C/E240.
 

Craiglxviii

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Next time you're under Gunther you can check - it's stamped/cast into the casing. It will appear as W5A580.

OP yours will be marked W5A330 as I'm certain it's the lower rated gearbox on the C/E240.
Vewwwy intewesting Mr. Bond!

im honestly trying my hardest to stay clear of Gunther’s underside. That’ll mean that I’ve hired a lift and am looking at the secondary cats.....
 


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