[W126 Coupe] How to gain 112 bhp normally aspirated horsepower onyour w126 in a day !

[Robert Karl Stonjek]

> Here's how I did it :
> 
> http://wwww.benzworld.org/forums/forums/thread-view.asp?tid=1258710&posts=11&fid=12
> 
> 
> cheers
> talbir
> 
> 
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There's more to the 560 power than just the engine - it must have the right CIS-E and EZL or you may find there is an awful lot of power missing.  My 560 (300Hp version) had the wrong CIS-E and lost substantial power above 4,000-RPM because of it.

The correct Bosch numbers of the parts for the High Power version are (source: ESI[tronic]):-
EZL, Original Part:
0 227 400 608
Replacement Part:
0 227 400 606
Exchange part
0 986 261 615

CIS-E Original Part No.
0 280 800 157
Replacement Part
0 280 800 156

Fuel Distributor Original Part
0 438 101 016
Replacement Part
0 438 101 015
Exchange Part
0 986 438 215

You must also have a working Air Temperature Sensor (failure is common)
0 280 130 047

If you are upgrading from the 300, you'll need an altitude sensor and idle speed control unit (that I can think of).  Beware that MB manuals tend to leave out the wiring of the air temperature sensor.

Let me know how you go with the CIS-E and EZL - a previous owner of my Benz replaced them with the wrong versions and I'm in need of replacement parts :)

Robert

PS
you might have taken another day and given the motor a good clean before installation...
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