Can it be done?

Aren't you better off getting a TDI instead of an SDI first?

I believe one needs to visit www.tdiclub.com and peruse their forums. I believe this kind of thing is touched upon quite often. I'll do a search. Any of the below?

http://forums.tdiclub.com/showthread.php?t=59967&highlight=supercharge

http://forums.tdiclub.com/showthread.php?t=59202&highlight=supercharge

http://forums.tdiclub.com/showthread.php?t=99195&highlight=supercharged

I've not read any of those links yet, but I'd assume you'd need a supercharger that could provide up to 3 bar of boost.

Not sure how common that is?

Not thinking of doing it, just intrigued as to whether it'd work.

Only thing I would say was if it did work why have there been no experimental / prototypes out there, or even a risque production attempt of one? Must be something inherently bad about it. Pretty sure Merc would have attempted a Kompressor diesel by now if it were OK? no?

In one of those threads there is a link to a press release from Daihatsu (IIRC), which featured a supercharged diesel on one of the car shows. So it has/can be done

IMO and without any research....

Historically, superchargers provide a less laggy grunt at low revs response than a turbo. They are less efficient and drink more fuel.

Diesels are good at low/medium revs anyway, so why add a supercharger.

OTOH, fit the right sized Lysholm Screw (Sprintex) type supercharger and control access to boost electronically, and there's potential. Pluses would be better response and power modulation at lower revs, I think. Compared to a 1.9PDTDi, I think it could be made to produce a wider range of controllable power at lower revs.

Also potential for variable cam mularky and Miller cycle to improve efficiency further, though I have reservations as to whether it would work properly in a Diesel.

J.

No reason why it wouldn't work. It's just a mechanically driven blower rather than a gas driven one after all.

As has been said petrol and diesel engines respond differently to forced induction though so there may not be any benefits over turbocharging

Here's an excellent link.

http://en.wikipedia.org/wiki/Superchargers

No reason why it wouldn't work. It's just a mechanically driven blower rather than a gas driven one after all.

As has been said petrol and diesel engines respond differently to forced induction though so there may not be any benefits over turbocharging

I'm sure supercharging it will work.

The bit I'm not sure about is Adopting Miller cycle on a Diesel engine. Anyone know of any university chaps who might want to give it a whirl?

J.

Mazda produced a 2.0 626 'Comprex' diesel which ran a supercharger.

I've not read any of those links yet, but I'd assume you'd need a supercharger that could provide up to 3 bar of boost.

:confused:

why on earth would you need that mate?

or are you running 3bar on your PD130??

3 bar is massive pressure, 3 bar is about 45psi.

forgot to actually answer the question

can't see why it wouldn't work as its just a different way of squashing air like the Dr said above.

The two-stroke diesels used in heavy plant, locomotives, and ships are always supercharged. On those engines, though, it's to scavenge exhaust gas and fill the cylinders with a fresh charge.

But I guess that's not what you're really asking...

Sure it is possible as it's the same as turbo charging just you drive from the crank rather than from the exhaust.

How on an octy, no idea, however it would bring a hell of a meaning to SDI you would need a slanting red S to stick on it :P