Is a bigger than stock turbo on 617 possible? Just wondering if there is a bigger turbo out there that will bolt right up to my 300d om617.

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what a day

Turbo Information Thread (Needs your contributions!)

I don't think anything will bolt on, but you could have the turbo rebuilt with a larger conpressor housing

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint

Garrett GT28 is available in a T3 housing from Tial I think that is bolt on and bigger. Much more modern design that will help, you WILL need an intercooler and fueling upgrades to bother.

the larger the turbine wheel, the more turbo lag on acceleration. Although ultimate power may be greater, the car can end up less driveable satisfaction-wise. I don't think you can improve on the engineering that Benz has expended.

VGT/VNT options, while more complicated, are far more advanced than the 100year old technoloy in the T3 and certainly would be an improvement. Enough to warrant the work for a daily driver? For the hacker only maybe.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Lulz

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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped

In 1980 maybe. Remember, these cars were designed in the 70s. We have come a long way since then.


Did I get a return on my investment swapping to a VNT? No way, I don't drive enough for the .75-1mpg to matter. But it was fun to have instant boost

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

unfortunately there are no bolt on vnt's available that I'm aware of, otherwise I would be all over that

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint

There are plenty of bolt on vnts if you dont mind hassling with the turbo and oil.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

They come with a .42/.48 T3 turbo, which is the smallest variant of the T3 on both the hot and cold sides. Lots of other turbos out there share the T3 flange and are larger in either the hot side, cold side, or both. As pointed out bigger isn't always better. You want to size a turbo to be efficient at the pressure ratio and CFM you intend to operate it.

FWIW, I use the .42/.48 on my 3L gasser. It'll boost 18-19 PSI at just under 3K RPM and make gobs of torque. It runs out of steam by 5K RPM, but since I value low RPM torque over high RPM horsepower its perfect for my combo.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

I'm thinking a t3/t4 hybrid with ceramic ball bearings would be pretty sweet

T3/TO4B Turbochargers | www.TurboneticsInc.com - Boosting Since 1978 | turbochargers, intercoolers, wastegates, blow-off valves, controls, boosting systems, turbo kits, forced induction parts & accessories

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint

You need to decide what you mean by bolt on.

There are plenty of turbos that share the same flange as the turbo on your car and will "bolt up"

But a turbo that will bolt to the stock oil lines, and connect perfectly to the proprietary intake manifold connection on the 617. There really isn't one.

And if you're "bolting" a bigger turbo up you haven't added any additional fuel, nor any additional cooling so you've wasted time and money. You'll have a shiny turbo on your motor not doing anything but lagging.

In my opinion be sure you're car is tuned within an inch of its life before worrying about a bigger turbo. If your valves are out of adjustment, your tank strainer is clogged, and your injection pump is timed wrong a giant turbo on stock delivery valves will fix none of that.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

No there aren't. Nearly all use a manifold flange design proprietary to the OEM application. VW uses T2 flange on some engine models, but thats as close as any get.

Actually .36 is the smallest on the turbine and these engines use a T3-45, there is a T3-40 with a smaller compressor.