I wish to know how much the OM612 Engine can handle (this engine is used on the Mercedes ML270 2002 , has 163BHP 370Nm) , What is the limit of Torque/HP that this engine can handle safely without too much risk and without the need to Reinforce the engine and such
OM612 Limits
- Thread starter bax
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About 270-300bhp is possible with the right turbo. I'd only recommend going upto 215 bhp tops for economy, reliability and usability. KC performance are offering a good range of maps on these engines adding up to 40bhp to the stock engine tune.
Hmm according to their site the ML270 and the Rexton 270Xdi have different engines ..OM612 for MB and M665.925 for Rexton ... i was sure they shared the same engine hmmm i need to do some research .. they only have 1 tune for the Rexton and it includes DPF removal , mine dosnt have a DPF since its an older model (2005)
Different countries often had different specs.
ive done my research and it seems true .. they dont share the same engine .. it an earlier model with less potential on the Rexton ... no wonder the tunes arent as good as the ones for the ML270 .. well thats that i guess
also if anyone wishes to know the Limits for the M665-925 its 500Nm according to a Rexton specialist
also if anyone wishes to know the Limits for the M665-925 its 500Nm according to a Rexton specialist
Eatthisvr6
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What dictates that limit? And jow do you get near it?
Its a 7 year old post .
Eatthisvr6
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Its 1 of 2 threads that google found
Power limits are usually where the engine will fail if you go beyond it. The conrods, crank piston, and even the cylinder head have effective pressure limits. Balance of the engine also comes into it, when engines are properly balanced and have forged parts they are much more tolerant of large power hikes. It makes sense to upgrade everything that could potentially fail when upgrading a car.
Eatthisvr6
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Thanks for the info but when i asked the question i was asking what numbers are reasonably attained and where the bottle necks are
Ah sorry, fuel is usually the first thing to top out, and this happens around 240bhp - you'll need a fuel pump and injector upgrade at this point. Then the turbo will start to run out of puff, and this will need upgrading 250bhp is a practical limit on most stock turbos, before they start to whine, smoke and fail.
There are stage 1 turbos around for the similar OM612 with upgraded bearings and over sized compressor wheel for around 270bhp then if you want more than 300bhp you'll need at least a 2260 compressor wheel with extended tips.
The Mercedes engine parts are more readily available than Ssangyong parts, so these are a good place to start when looking for upgrades but you start to wander into uncharted waters.
I'm always amazed that a remap will give around 40bhp more power and improve fuel economy by around 13% on these engines.
There are stage 1 turbos around for the similar OM612 with upgraded bearings and over sized compressor wheel for around 270bhp then if you want more than 300bhp you'll need at least a 2260 compressor wheel with extended tips.
The Mercedes engine parts are more readily available than Ssangyong parts, so these are a good place to start when looking for upgrades but you start to wander into uncharted waters.
I'm always amazed that a remap will give around 40bhp more power and improve fuel economy by around 13% on these engines.
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Eatthisvr6
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thanks for the reply.
at 240 are the injectors and/or pump maxed or is it safe at that?
what torque numbers will the stock bits run?
whats needed to go from stage 1 remap (195 hp 300 lb ft) to 240 hp?
id be fine with 240 hp tbh as long as i could get some decent mid range torque, this thing weighs 1.9 tons lol
also are the autoboxes a non issue or are they made from chocolate?
