Question on the twin charged 1.4 tsi

[taxiboy]

From my understanding, the supercharger kicks in from 1 rpm as it is connected to the crankshaft, in turn, the exhaust gas spools up the turbo, is the turbo phrased in over certain rpm's or does it cut in and stops the supercharger at a specific rpm.

what determines how much boost is produced by the turbo? purely based on rpm?

Not really relevant to anything really, just curious to learn more about this great engine.

 

[techie]

The supercharger is driven but the engine via a magnetic clutch, turbo is driven by exhaust gases and boost is controlled by a wastegate operated by the ECU.

The supercharger provides boost and is routed into the inlet manifold, the turbo spools up and the air path is blended with the super charged air until the super charger cuts out (3500 rpm) and air is direct from the turbo.

About as simple as you can make it really, alot else goes on but thats the nuts and bolts of it.

 

[taxiboy]

THanks Techie.....would you know of any good guide where I can read up the technical stuff on this engine? Really can't wait to pick my cupra up next week.,......

 

[VRSLOZ]

So basically if I read that right is that there is no turbo lag?

 

[taxiboy]

well, the supercharger creates the low end power which compensates the turbo lag ...however, modern cars have very little turbo lag anyway (a sec or 2)...

Anyone know if the turbo on the cupra is big and therefore boost big?

 

[VRSLOZ]

well, the supercharger creates the low end power which compensates the turbo lag ...however, modern cars have very little turbo lag anyway (a sec or 2)...

Anyone know if the turbo on the cupra is big and therefore boost big?

Cheers for that, actually found this post a good read

 

[taxiboy]

I found a good guide

youtube.com/watch?v=Pdp5ibjfo7o

 

[mainaman]

There is still some lag.Or maybe it's the DSG!If you are driving along and suddenly put your foor down,the box drops two gears,the revs go up and the car catapults,but if you lift immediately(have to be very fast) after the revs jump the car doesn't do it!

There are some critisisms about the kickdown,because it gets you out of the power broadband of the engine,so you get lots of revs and noise before the thrust comes,usually at the next gear after the kickdown.

I still can't believe nobody else has made a small twincharger engine,although advancements like the modern twin-scroll turbos,sequental turbos and other tech has minimized the turbo lag considerably.

 

[FR_POWER]

I think vw has patented it, soooo I think no can use it.

 

[mainaman]

They have patented their implementation only and there is at least one more engine on sale today with compound induction-the highly tuned LS7 in the Zenvo supercar!

 

[FR_POWER]

Crazy japan people have done it on a highly tuned s15. Apprantly it's good for drifting. Lololol

 

[Bocawata]

If you go into "YOU TUBE" and search for " VW TSI TWINCHARGER"! you will see a 4 1/2 min film explaining of how it all works !!!.Its Very Good at putting it into simple terms for us non mechanical guys!!!
Bocawata.