Looking to buy a W124 with NA to Turbo conversion
Looking to buy a W124 with NA to Turbo conversion
I'm looking at purchasing a W124 250D OM602 with manual everything as my daily driver through winter. The car was an NA originally, and was converted to turbocharged with an intercooler several years ago by a company specialising in such conversions. We never officially had a w124 turbo diesel in this country.
I managed to contact the guy that owned the company (before they went out of business) to ask him what they would have done internally to the engine. He said that other than the bolt on aspects of the conversion, the rod bearings would have been replaced to the turbo versions to allow oil to flow to the piston squirters in the rod.
Does this sound feasible or should I run away and forget about a Mercedes turbo diesel?
I posted a message about this over at Peach, but this place is probably more suitable. I did search and find this thread advising against such a conversion.
I'm looking at purchasing a W124 250D OM602 with manual everything as my daily driver through winter. The car was an NA originally, and was converted to turbocharged with an intercooler several years ago by a company specialising in such conversions. We never officially had a w124 turbo diesel in this country.
I managed to contact the guy that owned the company (before they went out of business) to ask him what they would have done internally to the engine. He said that other than the bolt on aspects of the conversion, the rod bearings would have been replaced to the turbo versions to allow oil to flow to the piston squirters in the rod.
Does this sound feasible or should I run away and forget about a Mercedes turbo diesel?
Oiling is only a small part. The non-turbo engine isn't built as strong.
Have you looked into a C250 with the OM605? They should have been available there with a factory turbo and they have much more power potential than the 602. By the time you've spent the money getting your 602 built to handle a turbo and get good power, that money and the pre-mod sale value of the car would easily cover the value of a good C250.
ForcedInduction
10-22-2009, 01:21 PM
#2
They would have had to change the rods too. I really doubt MB would have included predrilled rods and intentionally block off the holes.
Oiling is only a small part. The non-turbo engine isn't built as strong.
Have you looked into a C250 with the OM605? They should have been available there with a factory turbo and they have much more power potential than the 602. By the time you've spent the money getting your 602 built to handle a turbo and get good power, that money and the pre-mod sale value of the car would easily cover the value of a good C250.
Yes, now you mention it, I have been looking at C250's with the turbo diesel. I've also seen some loaded W210 E300 turbo diesels for very cheap too that i've been tempted by.
The w202 might be a bit of a come down though, i'm used to the size of a long w126 , which is why I was looking at a 124 as they are still a good size.
What's the om606 like to tune in the w210?
Ben
Thanks, I was a bit skeptical about that being the 'only' thing that needed to be done to the engine.... I'll give it a miss! It might run ok as it is, but i'd like to tweak whatever I get to give it a bit more pep.
Yes, now you mention it, I have been looking at C250's with the turbo diesel. I've also seen some loaded W210 E300 turbo diesels for very cheap too that i've been tempted by.
The w202 might be a bit of a come down though, i'm used to the size of a long w126 , which is why I was looking at a 124 as they are still a good size.
What's the om606 like to tune in the w210?
Ben
The main issue with the W210 E300 is the extremely tiny turbo. If you want performance, it needs to be one of the first things changed.
Myna Diesel in Finland also has injection pump upgrades that can push the engine upwards of 500hp, with necessary modifications, but 300hp on bone stock internals is known to be common there.
ForcedInduction
10-22-2009, 02:07 PM
#4
Its electronic. Several companies can remap the ECU to produce 205hp from the stock 177hp. One example: http://executivetuning.com/PerformanceFigures.asp
The main issue with the W210 E300 is the extremely tiny turbo. If you want performance, it needs to be one of the first things changed.
Myna Diesel in Finland also has injection pump upgrades that can push the engine upwards of 500hp, with necessary modifications, but 300hp on bone stock internals is known to be common there.
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
I say do it anyway. A full manual 124 would be a fun little car. If/when the motor blows, it would be even more fun with a 606.
'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
Original turbo engines have more robust internals than NA engines. The most critical are connecting rods and oil sprays for the pistons (latter on 604-606 NA also). 601-603 NA rods are good for ~250hp on 6cyl, 604-606 NA or 602-603 turbo for ~350hp 6cyl and 605-606 turbo for ~450hp or more. Also the 606 head gasket is the best one, AFAIK a direct replacement for 603.
AFAIK 599hp has been dynoed from OM606. On stock internals 450hp is not a problem on original turbo engine. The problem (at least in Finland) is emissions, so the engines are usually swapped to older cars.
Original turbo engines have more robust internals than NA engines. The most critical are connecting rods and oil sprays for the pistons (latter on 604-606 NA also). 601-603 NA rods are good for ~250hp on 6cyl, 604-606 NA or 602-603 turbo for ~350hp 6cyl and 605-606 turbo for ~450hp or more. Also the 606 head gasket is the best one, AFAIK a direct replacement for 603.
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