I'm looking to go VNT on my om602. Since I'm building just solely for speed, I want the best possible vnt easily found.


Some semi run a VNT setup - along these lines!

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-1983 VW Rabbit LS Diesel (5speed, VNT/Giles build)

How about the Holset HE351VE? It's not Semi big, but it's big enough to flow more air than I bet you can use, and it has a t3 flange.

Just search for "Holset" on Ebay, there are a ton of them on there.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Almost, its slightly bigger.

You have anything from the tiny GT1542V all the way up to Holset's huge HE551V/VE.

what would the max PSI be, and at what rpm does it get violent?

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-1983 VW Rabbit LS Diesel (5speed, VNT/Giles build)

The HE551V/VE? It can push 50psi on a 14.0L Cummins ISX and would light up around 7000rpm on your small engine.

Even the HE341VE used on the 6.7L Cummins would be far more than your engine could handle. Unless you are aiming for 500+hp, anything bigger than a Garret GT3788V (Powerstroke 6.0L and Intertrashional DT466E) would be a waste of time. Even the E320CDI's GT2359V will supply enough air for your engine to make 300hp.

Bigger is not better when it comes to turbos. You need to find what best matches your engine's specs and airflow needs, not the biggest you can throw on it.

Yah, it does help to have enough exhaust flow to spin the thing.

Where the hell do you get all of this turbo model availability/knowledge Forced?

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Gone to the dark side

- Jeff

I cant seem to find much on VGT's anywhere...

GT3788V it is. I was shooting for around 300-350hp.

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-1983 VW Rabbit LS Diesel (5speed, VNT/Giles build)

Searching the internet/forums and working on trucks that have them.

Even that is much too big for your engine and those power goals, it would even be too big for a 603 with those power goals (There is a 603 in Finland making 415hp with that turbo). Keep an eye on eBay, there is often a GT3576V with a buy it now between $175-250 that would be about perfect for what you need.

I think the GT3788V is a pedastal mount rather than a flange mount. Personally, on an inline engine, I'd rather have the flange mount. You'll end up having to fabricate a pretty hefty side mount on the engine with the oil supply and returns built in. This turbo also has oil pressure controlled vanes with a computer controlled valve so you'll have to come up with a way to either convert it or control it.

I ran some numbers assuming the following:

OM602
2497cc
350HP goal
Decent intercooler
4750 RPM peak HP

Result:

Wa = 49.77 IIc = 3.93

Plug these two numbers into the compressor maps of turbo's you're interested in to see how they compare.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

The Powerjoke's turbo is pedestal mounted, but the Intertrashional's is a normal flange mounted.

Attached Thumbnails

   

OK, thanks. Never seen the other version.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Is that the version that Brandon bought? That would certainly make mounting it easier!

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

This is the kind of work everyone should aim for.

http://www.turbotec.com/galleria/mercedes300td.html

That looks like the 400HP car with the GT37!

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John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

What is that valve just after the compressor housing?

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine