Turbocharger vs Supercharger

[targa]

Targa, what was the point of that last comment.....

it was just as pointless as niko's

dont talk to me about pointless posts, in case you havent been paying attention, they are my specialty

po-po (blue lights in rearview)

"my name is officer fpv_gtho, UCP state post control. License and regestration please"

"here you go officer"

"do you know what you did back there that made me pull you over?"

"no sir, i was in cruise control, and well within my limits. what was your reason?"

"erm...."

"do you have a reason?"

"umm...youre right. in that case, i have no reason to keep you, have a good day"

"you to officer"

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

What's wrong about my post? Just like you pointed out his repost I'm pointing out yours. You obviously didn't use the search button when making that thread my man.

No hard feelings

im sorry, i was a dick, girl trouble, makes me assish

i was out of line, and for that, i am sorry

[fpv_gtho]

it was just as pointless as niko's

dont talk to me about pointless posts, in case you havent been paying attention, they are my specialty

po-po (blue lights in rearview)

"my name is officer fpv_gtho, UCP state post control. License and regestration please"

"here you go officer"

"do you know what you did back there that made me pull you over?"

"no sir, i was in cruise control, and well within my limits. what was your reason?"

"erm...."

"do you have a reason?"

"umm...youre right. in that case, i have no reason to keep you, have a good day"

"you to officer"

I dont think i'll even bother with this BS as Niko's already pointed out what wouldve said anyway.

[targa]

I dont think i'll even bother with this BS as Niko's already pointed out what wouldve said anyway.

fpv_gtho, what was the point of that last comment.....

[KnifeEdge_2K1]

Well only the s/c will give torque from low revs.
The twin-turbos on each pair of cylidners HAS advantages over sequential as it usually involves less restriction to flow and hence "easier" power.
Make up for hte lack of a smaller lighter turbo for the mid range revs with a s/c and bingo.
Quite a neat setup too.

true but a parrelel setup will accomplish teh same thing

and since turbo boost pressures go up exponentially with flow rate its not really a problem of a turbo not being able to create enough boost but just a heat management issue, a parrellel setup will produce similar results with less weight and less drag on driveline parts (true the supercharger is probably connected through an electro magnetic clutch but the turbo's will always be "on" unless you have a bypass which adds even more weight and complexity

[fpv_gtho]

fpv_gtho, what was the point of that last comment.....

Are you trying to be a moron cause youre doing pretty well

[targa]

Are you trying to be a moron cause youre doing pretty well

ooh, ouch, my psyche is reeling......wish you wouldnt use such strong language with such a moron as myself

if you remember, thats not my comment, its yours...used on you....and you respond in anger

tisk

tisk

tisk

i tried to use humour...you havent a sense of humour

nice way of masking a personal attack though

[fpv_gtho]

Ha, anger? Your mistaken on that one. Im holding back the laughter on this one.

Masking a personal attack ey, thats rich following that stunt about the cop you pulled no more than half a dozen posts before.

[IBrake4Rainbows]

Whoa now.

Mod Control in Process.

Say sorry, Both of you

[fpv_gtho]

Alrighty then,

Sorry Targa

[henk4]

coming back to the subject, VW has just announced that they are developing a 1.4 litre FSi twin turbo with a supercharger for the low revs and an exhaust turbo for the higher revs. It will produce about 170 BHP and 200 Nm of torque. First to be fitted with the new engine will be the Golf, expected average fuel consumption 7 litres per 100 km. (As we all know it was Lancia who first combined the two turbo types in the Delta S4)

[2ndclasscitizen]

i'd go a supercharger, you can have instant boost using a positive-displacement blower, or have next to none at low revs and have it build up with revs, also less heat in the engine bay and less piping

[Matra et Alpine]

true but a parrelel setup will accomplish teh same thing

It doesn't !!

The smaller, lower inertia turbo STILL needs significant exhaust pressures to operate. It's a helluva lot less than a full on big turbo but equalliy is a helluva lot more than an s/c

and since turbo boost pressures go up exponentially with flow rate its not really a problem of a turbo not being able to create enough boost but just a heat management issue, a parrellel setup will produce similar results with less weight and less drag on driveline parts (true the supercharger is probably connected through an electro magnetic clutch but the turbo's will always be "on" unless you have a bypass which adds even more weight and complexity

Turbos cannot always be "ON" or they blow the intakes
They also do NOT grow exponentially to inifinity. Ther are limits reached as the impellor speeds up and starts to do the uquivalent of cavitation. That's why sequential turbos are very useful and why they tend NOT to be their for BEYR high power/boost. Guys going after REALLY hight bosts acept lag.

There are always wastegate controllers and dump valves.
weight and complexity

[aNOBLEman]

BMW's I-6 desiel engine has a smaller (I think) turbo for low revs and a big one (again I think) that takes over as the revs climb. I think it produces 268hp and like 300something lb-ft of torque.

[Godlaus]

That's the entire idea behind sequential turbos, to lessen turbo lag. One small turbo for lower RPMs and one large turbo for higher RPMs.

268 horses from a diesel, with only 300 ft-lbs?

[IBrake4Rainbows]

Now imagine that in a car that weight 1400-1500 Kg,s Godlaus.

Goes like stink.