SCC Cars not running DV's

[G2232]

Now after attending the BTCC at Corft on sunday I asked one of the Seat Cupra Cup engineers about the set ups on the cars and got on to the matter of the DV's as i could not see one anywhere (to which i was confused) and it turns out they are not allowed them so the completely remove them, blank off the outlet, and blank off the return inlet.
Now can anyone explain how they can achieve this as i believed that the turbos would just stall under the back pressure created.
Is it just a case of that in race condisions they aren't reakky needed?

Any oppinions are welcome as im quite curious on this and didn't get chance to question him further as they were preparing for the race.

On another not though the ne LC's are quite a bit faster than the old LCR's
but in still not a big fan.

 

[BCM]

turbo will stall, but once throttle is applied again all would be fine and it would boost fine, the only proiblem would be the life of the bearings etc in the turbo but it should easily run 2 races.

 

[G2232]

but surely that would mean the car couldn't even run at its basic potential as the turbo lag would be even greater than that of a stock road car

 

[BCM]

my mate runs this kind of set up on his rally car, no DV, also runs anti lag managment with the set up, means no lag and constant power!

 

[ZBOYD]

I would guess you mean the SEAT Cupra Championship cars? Confusing thread title me thinks.

Not the BTCC, as they don't have Turbo's full stop, so have no need for a DV anyway!

SCC cars i believe run anti-lag. Hence they pop and bang a lot on gear changes. The older R class cars also run with anti-lag, or at least they used to.

 

[G2232]

I would guess you mean the SEAT Cupra Championship cars? Confusing thread title me thinks.

Not the BTCC, as they don't have Turbo's full stop, so have no need for a DV anyway!

SCC cars i believe run anti-lag. Hence they pop and bang a lot on gear changes. The older R class cars also run with anti-lag, or at least they used to.

sorry yeah good point about the title

 

[ZBOYD]

Edited the title for you

 

[G2232]

Edited the title for you

ha cheers

 

[RobDon]

but surely that would mean the car couldn't even run at its basic potential as the turbo lag would be even greater than that of a stock road car

Lag will be zero as no pressure is being released!

Turbo cars can run with no form of DV or BOV just fine, just means the life of the turbo is drastically reduced. Most turbo race, rally, drift cars etc. all run with no DV or BOV for maximum response.

 

[G2232]

you learn something new everyday

 

[Icecavern]

SCC cars i believe run anti-lag. Hence they pop and bang a lot on gear changes. The older R class cars also run with anti-lag, or at least they used to.

hmmmm I wonder if the part numbers are on ETKA

 

[Dyscontinued]

So who's doing away with their DV first then?

 

[ZBOYD]

I like my turbo to last.

 

[f1btn]

Lag will be zero as no pressure is being released!

Thats not technically true as the will be turbo stall if the pressure is not released which means there will be lag as the turbo picks up speed again!

And anti lag basically adds fuel between gear changes to keep the turbo from stalling!

 

[BCM]

Been there done that, eventually put the DV back on!

 

[RobDon]

Thats not technically true as the will be turbo stall if the pressure is not released which means there will be lag as the turbo picks up speed again!

And anti lag basically adds fuel between gear changes to keep the turbo from stalling!

The turbo doesn't stall that much, not enough to cause lag otherwise all these race cars would just run BOV's wouldn't they!

Pretty sure none of the SCC cars run anti-lag, they don't sound anything like rally cars that do run it.

 

[BCM]

thats true, the lag i had (from a standard small turbo) was zero, it was perfect in every gear, felt much stronger, if i had loads of cash or loads of k04's i'd do it all the time, but i dont so 007 it is!

 

[f1btn]

If you run a standard ish 20vt without a dump valve it will surely fault code wont it!I cant say we have ever tried this with any of our cars or customers cars we did however get a 20vt golf in that had a split vacuum hose all that did was give turbo chatter and that car did fault and produce very little boost.

 

[BCM]

i had no lights in the dash but vag com brough up a pressure drop code between turbo and DV ( cause there wasnt one there ) but ran sweet, just the wear issues that scared me off!