Supercharged 200tdi

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strange_days said:
Depends on the application

If you want less lag and early boost you could run sequential twin turbos like on an FD3S RX7
If you want more power and dont' mind a bit of lag, just get a big turbo
If you want 0 lag and have the space, and dont' mind a little bit of torque loss from the engine driving the unit, stick a supercharger in
Click to expand...

Yep because loss of torque on a landy is a big deal :p
 
with a charger u get alot more usable torque down low because with a turbo the wheels/engine are spinning fast by the time the torque has built up wich isnt great.
 
The freebie is the wife's :)

Didn't buy the thing, but it's got me thinking now. The motorbike I'm rebuilding is about finished, just needs tyres when the cash is there and it's ready to go out and play. Once that's done I'll need, I mean really NEED, a new project, summat to stop me gettin bored....

Think I'll have a nose around eBay to see what sort of engines and chassis are available for small amounts of cash, if I can spot something nice and tough.......
 
Vaggy, this is all your fault. There will soon be a spate of threads saying " My supercharged Landy has gone bang what should I do?" and "What size wheels should I put on my supercharged Landy?" :eek::rolleyes::D
 
dr evil... im fairly sure im right in saying a supercharger from a mini is to small for a 2.5, especialy if your removing the turbo aswell and going to put on a bigger pulley.

the bigger pulley will reduce the boost pressure on an already small charger.

the already small charger will probably only see an improvement in low end torque so id personaly try and keep the turbo aswel for the mid-hi end...

it is possible to run both and alot of vw cars (youl have seen TSI badges about im sure?) are running it now. could be worth a look to see the ins and outs of how/why,

if you do run just the supercharger bring the boost up with a smaller puller for more than just lower down torque.

id also say pull the engine out and instead of a new crank. have it ground and a set of new race bearings/bolts. you dont want to be doin all that work for 40 miles down the road it starts knocking like a knocking thing from the planet knock!

sorry for the long arsed post but ive been there and played with the pulleys it was a long and expensive que for a not so long ride...hope this helps
 
It was just a thought mate but thanks for your input, I was mainly thinking due to the 300tdi's low boost pressure the charger might need to have it dialled down as I assumed a mini would be a high boost charger as its from a cooper. I will look into it properly when I get round to doing this
 
hey i could be wrong, i havent looked at specifics but the one to look for would be volume or CFM cubic feet per minuite. the mini charge has to supply a 1.6 litre engine so will be geared to do so. on a 2.5 it simply wouldnt be enough air to create boost.thats where the smaller pulley would come in. i hope you do have a go at this, and good luck
 
I may look at taking a charger from a larger car then, theres a few CLK merc ones going. I will be attempting this after I've fitted my snorkel and completed the winch bumper I'm building :) So many things to do right now, plus I've still got to find another part time job :doh:
 
As much as I can admire the level of work that's clearly gone into that, I have to say that apart from being something different, it doesn't make sense to supercharge a diesel engine.

Turbochargers provide on demand power, since the boost pressures are directly related to engine load. Superchargers are not, they're related to engine speed. So the engine under higher RPM will always be on boost, which will kill the fuel economy.

Ofcourse a supercharger can offer more boost for more performance, but so can a larger turbo, or a variable geometry turbo can all but elliminate turbo lag, if that's a problem.

There's a reason you don't see supercharged diesels in the mainstream market, and that's because turbos do the same job better. Unless out and out power all the time is what you're after without any concern about the side effects.
 
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