190D 2.5 to 2.5turbo - PeachParts Mercedes-Benz Forum

KBCB · #1 03-28-2007, 01:19 AM

I am playing around with the idea of putting a turbo on my 2.5l. i'd like to get a little more out of it. so here are my questions...
1. where is the best place to find a turbo and other parts necessary to hook it up?
2. can i just bolt all the necessary parts on and call it good or would i have to go through the engine, and beef it up a bit?
3. what are some general thoughts about doing this? has anyone here done this before.

thanks for your guys input.

greasybenz · #2 03-28-2007, 01:33 AM

Id think youd need oil cooled pistons in order to properly turbo an N/A engine. Otherwise youll shorten the lifespan of the engine. and probably wont gain much power.

#3 03-28-2007, 01:35 AM

You will need to swap the entire engine to get any increase in power without harming engine durability.

KBCB · #4 03-28-2007, 01:37 AM

both of you guys kinda confirmed my suspicion. if the job requires major work to convert it over i won't. i'd rather keep the engine going. what would be some thought on an intercooler?

#5 03-28-2007, 01:44 AM

You would still need to exchange the injection pump to get any change in power output.

compress ignite · #6 03-28-2007, 01:53 AM

KBCB,

An intercooler cools the compressed (and heated by the compression) intake
air... no turbo ...no need for an intercooler.

#1 The 2.5 turbo engine has a "nitrided" (chemically hardened) crankshaft.
#2 As someone has already inferred the 2.5 turbo has oil spray jets (that
spray from the underside of the pistons).
#3 The pistons have an internal set of of passageways that conduct the oil
spray and remove heat from the piston crowns.
#4 The turbo engine has different injector "pop off" pressure (higher).

The load enforced by the turbo (air pressure and heat coefficient along with
higher detonation pressures) will doom the N A engine to a short lifespan.

KBCB · #7 03-28-2007, 01:57 AM

Quote:

Originally Posted by compress ignite

KBCB,

An intercooler cools the compressed (and heated by the compression) intake
air... no turbo ...no need for an intercooler.

#1 The 2.5 turbo engine has a "nitrided" (chemically hardened) crankshaft.
#2 As someone has already inferred the 2.5 turbo has oil spray jets (that
spray from the underside of the pistons).
#3 The pistons have an internal set of of passageways that conduct the oil
spray and remove heat from the piston crowns.
#4 The turbo engine has different injector "pop off" pressure (higher).

The load enforced by the turbo (air pressure and heat coefficient along with
higher detonation pressures) will doom the N A engine to a short lifespan.

ok that makes sense. my only hope was that because it was a diesel motor, generally they are more robust that gas motors, and i was hoping i could get away with it. if this was a gas motor i wouldn't have even bothered asking. alright so turbo, intercooler both out any other ideas to get some more power without sacrificing engine life?

#8 03-28-2007, 01:59 AM

The N/A engines are very limited on the power they can put out. Any additional fuel will just create black smoke, high temperatures, and reduced economy.

A K&N air filter or altered exhaust won't do anything for power.