supercharging a diesel

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Originally Posted by ramblingboy42

I wonder why GM were so successful with their supercharged diesel engines? Turbochargers were added to GMs but had to have different fuel pumps and porting to be successful.

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What JC said. A 2-stroke diesel with supercharger is like an NA 4-stroke diesel.

You will note that the high performance 2-strokes ran a turbo (plus the essential supercharger), rather than a 2nd supercharger.

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Originally Posted by isuzurover

What JC said. A 2-stroke diesel with supercharger is like an NA 4-stroke diesel.

You will note that the high performance 2-strokes ran a turbo (plus the essential supercharger), rather than a 2nd supercharger.

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Got overtaken by a coach in WA once, a double beck 'BOVA' (AAT kings I think.) 6V92T and it was HAULING:eek: For those that don't know, 6V is a V6 config, 92 is 92 cubes /cyl, and the T is for Turbo. For a 'little' engine they sure make some torque. I was sure it wasn't much above 1500RPM when it blew past me:D:D:D

Wonder if they fitted the 8V92TA (A for aftercooled) to these??:twisted:

JC

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Originally Posted by stig0000

well, driving this in its erly stages puts a vnt to shame, yes i no top end it will loose out abit but its a 4wd, so low down pull is what were after,

plus god dose it sound good:D:Di wana put one on my td5:angel: just put it inplace of the idler pully, perfict size, :D

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Does he have any plans to dyno it? I'd be interested in the shape of the resulting torque curve as well as measured boost and fuel consumption.

At 2000rpm with 12psi boost a 60% efficient supercharger will take 13.3kw of shaft power to run it.
That's a hit on not just power, but fuel economy.

It's no problem to make a turbo system that has all the boost you want from as low as you can use it. But I've found torsional vibration issues from trying to get too much boost too early. My Isuzu was putting boost from idle and would hit 20psi at 1400rpm. But I would need to at least double the weight of the flywheel to make all that torque usable at that rpm. From 1800rpm upwards it was smooth enough to use it all.

I've since fitted a bigger turbo, but haven't driven it much since due to a stuck speedo needle.:(

Our golf is super and turbo charged. Petrol but still.
Super charger pools up first and turbo cuts in where that leaves off.
Its a 1.4L motor.;)

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Originally Posted by big guy

Our golf is super and turbo charged. Petrol but still.
Super charger pools up first and turbo cuts in where that leaves off.
Its a 1.4L motor.;)

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The 1.4 TSI. Good way to get more torque from a smaller motor.

They have to use a twin charge setup because VNT turbos don't like the high exhaust temps of a petrol motor, they also have a wider rev range than diesels.

Superchargers appear to be a dying breed in production vehicles.

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Originally Posted by Dougal

The 1.4 TSI. Good way to get more torque from a smaller motor.

They have to use a twin charge setup because VNT turbos don't like the high exhaust temps of a petrol motor, they also have a wider rev range than diesels.

Superchargers appear to be a dying breed in production vehicles.

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We had the TSI for a week now and be happy to actually give it back.
We are getting our TDI back from a warranty fix.
The twin forced induction process under the hodd sounds too busy, like a beehive that had petrol poured over them.:eek:

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Originally Posted by justinc

With the 2 stroke GM, the Supercharger was there to provide airflow/ scavenging effect. They won't run without one.

JC

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And God help you if the blower seal goes on one! Those GMs rev hard at the best of times, you'll know just how hard when they start sucking too much air!!

Gotta love the noise of the Ol GMs :)

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Originally Posted by big guy

We had the TSI for a week now and be happy to actually give it back.
We are getting our TDI back from a warranty fix.
The twin forced induction process under the hodd sounds too busy, like a beehive that had petrol poured over them.:eek:

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that is a big problem,, its just not going to work on a 1.4L engine,, id take the DSG 2L diesel anyday

anyway,, back to it,, wev got a new bigger aultenator in and a 3 core aloy rad to help cool the engine down, were going to be getting a IC from mace engineering as they told us 12 psi will be fine with no ic, just if want more then that gota start looking at it, and when we told him at the end we wana be pumping 19 he said hell yer IC and bring it down as we need to inspect this beast:D:D

we are sorting out a dyno and a tune, and we are going to put my car on as well, see how the turbo gose agenst the supercharger:twisted: but i just wana see how mine gose realy:angel:

i cant remeber the name of the place but its in briz and they do most of the comp winch and speed trucks, so they sould be able to get the most out of it

i forgot,, a sneek peak of it just after fitting it, alot of tidying up was needed after,
https://www.aulro.com/afvb/images/im...10/12/1297.jpg

wish i could open my bonnit and see one of them chillen on top of my engine:angel: on day