Supercharged Cooper S with a Dump Valve vid!!!

[P33 ULC]

If you cant fit a dump valve/Blow off valve to a supercharged cooper S, how come this one has one???? Its not an R56 S, if you look at his video part 2, you can see its an R53!! And also for 250ps, doesnt seem that quick??!?! Is it maybe twincharged n thats why its dumping???!

YouTube -...

[minioneandrew]

....i recognise your face......
Technically its possible, bit it would be just like having a boost leak i think.

[MINI-Morgan]

Twin Charge maybe??

Ummm how can you fit a dump valve to a supercharged car? other than a fake one ofcourse! In my mind there is no excess boost to release as the SC is after the throttle body.

[minioneandrew]

A modification to the bypass valve, to vent somewhere? In essence after i put on my cai, i can here, a whoosh (very quiet) wen i change gear, im assuming this is the bypass valve closing?

[P33 ULC]

On 2nd look, that is definitely twin charged. Listen to the turbo spooling up in the first few seconds of him pulling away. And hence why the supercharger doesnt sound that loud (cos on the twincharge kit i believe you fit an enlarged pulley as opposed to a reduced one so the supercharger aint gettin stressed out)

[chuntington101]

Quote: Originally Posted by P33 ULC (original)

On 2nd look, that is definitely twin charged. Listen to the turbo spooling up in the first few seconds of him pulling away. And hence why the supercharger doesnt sound that loud (cos on the twincharge kit i believe you fit an enlarged pulley as opposed to a reduced one so the supercharger aint gettin stressed out)

on a twincharged engine you would want a dump valve on there (post turbo pre throttle body). it will help the turn spool (well actually stop it form stalling).

most twincharged guys run stock pullies. if you where to spin the stock supercharger slower i dont think htere would be much point in keeping it on there.

Chris.

[P33 ULC]

Alta Mini Performance - Supercharger Pulley Oversized

Supercharger Pulley Oversized

Sold exclusively for custom S/C and twin charged applications. Stainless steel construction guarantees a lifetime of durability and performance.

[MiniOneSam]

Unless he has a Turbo from GTT in it maybe?

[P33 ULC]

Quote:

Unless he has a Turbo from GTT in it maybe?

Can still hear the supercharger though

[GARY GP]

sorry that car is not twin charged!! far too slow..

[chuntington101]

Quote: Originally Posted by P33 ULC (original)

Alta Mini Performance - Supercharger Pulley Oversized

Supercharger Pulley Oversized

Sold exclusively for custom S/C and twin charged applications. Stainless steel construction guarantees a lifetime of durability and performance.

nice find!

but its not going to spool the turbo up as fast as a stock one.

Chris.

[Cooper_si]

Quote: Originally Posted by 300GP (original)

sorry that car is not twin charged!! far too slow..

Ive got to agree with you on that statement. Ive seen vids from the states with ALTA twin charge kits that wheel spin in 3rd in the dry !!! so this cant be twin charged.

Like most say theres prob a boost leak. There is a mechanical boost control valve under the RH intercooler horn but ive never heard this make a noise that loud.

Whooo knows what the sound could be......

[Tüls]

Quote: Originally Posted by 300GP (original)

sorry that car is not twin charged!! far too slow..

deffinetly too slow for a TC car...

Quote: Originally Posted by P33 ULC (original)

Alta Mini Performance - Supercharger Pulley Oversized

Supercharger Pulley Oversized

Sold exclusively for custom S/C and twin charged applications. Stainless steel construction guarantees a lifetime of durability and performance.

While Alta does make the over sized pulley, it's really of no use... even with the stock pulley eventually the SC is in the way of the turbo, and if the SC was going any slower it wouldn't be able to take in the Turbo air fast enough. Most who have tried the over sized pulley have gone back to stock...

I have also tried under driving the SC... while good it didn't allot the turbo as much boost... and there for you loose power... but was very linear compared to the stock pulley which drives more like a turbo car...

[Cooper_si]

Quote: Originally Posted by Tüls (original)

deffinetly too slow for a TC car...




While Alta does make the over sized pulley, it's really of no use... even with the stock pulley eventually the SC is in the way of the turbo, and if the SC was going any slower it wouldn't be able to take in the Turbo air fast enough. Most who have tried the over sized pulley have gone back to stock...

I have also tried under driving the SC... while good it didn't allot the turbo as much boost... and there for you loose power... but was very linear compared to the stock pulley which drives more like a turbo car...

I knew you would know something along these lines....

[newyorkaddict]

Quote: Originally Posted by MINI-Morgan (original)

Twin Charge maybe??

Ummm how can you fit a dump valve to a supercharged car? other than a fake one ofcourse! In my mind there is no excess boost to release as the SC is after the throttle body.

My friend has a Dump Valve on his Polo G40, that uses a supercharger, i will see if i can find out how it works. Maybe try and get some pics if i can.