A new breed of turbos available

[shaeff]

Borg-Warner is now beginning to market enthusiast/performance market turbos. Read more here:

http://www.full-race.com/articles/borgwarner-efr-turbos.html

Some of this stuff is cool as hell, should be interesting.

There's an interesting thread about it on one of the BMW forums I frequent:
http://forums.bimmerforums.com/forum/showthread.php?p=20670157#post20670157

 

[Kai]

I like the integrated BOV valve...welly clever!

 

[shaeff]

Yeah it's pretty cool stuff. It would be nicer if the BOV cover was aluminum rather than plastic. (at least it looks plastic). I any case, I'm anxious to see what one of these bad boys would do on a MKIII.

 

[grimreaper]

might be a while, none seem to be running right at the moment


The design of the internal WG looks very promising. i dont know how many WG setups I've seen that ignore the basics laid out by Corky Bells book.

 

[mk3tattoos]

there is going to be 16 different flavors to there also all variable vein geometry turbo and they use ti-com for the wheels. its a compound similiar to titanium and carbon fiber, just lighter and stronger. also all the wheels are centercut billet!!!! extremly high quality...with the variable vein you have 0 lag, especially with all the billet and ti-com parts. i realy like the boost control solenoid built into each one.

geoff from full race is already developing kits.

 

[mecevans]

Mitsubishi turbos have the integrated bov also. Mm on expierence with them is when upping the boost you can outflow it and get surge.

 

[CT26smoker]

In my personal opinion, having the BOV at the turbo is a mistake.
Bell's info was fine 20 years ago, but has little meaning these days.
The pressure wave caused by chopping thr throttle originates at the throttle.
If you have the BOV at the turbo, you have a back flow of compressed air from all the piping & intercooler after it.

 

[DOUBL3 D]

In my personal opinion, having the BOV at the turbo is a mistake.
Bell's info was fine 20 years ago, but has little meaning these days.
The pressure wave caused by chopping thr throttle originates at the throttle.
If you have the BOV at the turbo, you have a back flow of compressed air from all the piping & intercooler after it.

wouldnt it just vent to atmosphere...i dont see how that would cause a back flow of compressed air.

anybody know pricing? im guessing they will be a pretty penny

 

[bioskyline]

some of the volvo's also run bov's on the turbo.

 

[mk3tattoos]

i am thinking to run one on the 1jz i bet it would perform very well with it!

 

[CT26smoker]

wouldnt it just vent to atmosphere...i dont see how that would cause a back flow of compressed air.

Because, while under boost, all the air in the system is pressurized, right ?
Then you chop the throttle, the air is still under pressure until the BOV opens.
If it (the BOV) is all the way back at the turbo, the compressed air in all the piping, and intercooler will flow towards the low pressure area (the open BOV).

some of the volvo's also run bov's on the turbo.

Not really a high performance turbo system.........

 

[WhtMa71]

Seems to me you're eliminating the pressure wave at the source. The reason there is a surge in the first place is because the throttle is shut and the turbo is still pumping air for a moment. A manifold vacuum source will open the BOV immediately and vent the pressurized air right at the compressor outlet.

 

[CT26smoker]

Seems to me you're eliminating the pressure wave at the source. The reason there is a surge in the first place is because the throttle is shut and the turbo is still pumping air for a moment. A manifold vacuum source will open the BOV immediately and vent the pressurized air right at the compressor outlet.

And what happens to the pressurized air in the piping & intercooler.......
Does it majically dissapear ?

 

[mk3tattoos]

^^^Cosworth and borg warner made this turbo and im sure they know what there doing, lol.. i dont think they are going to go through all this hard work to just ruin it by adding a bov to the turbo. these two companies are just badass, point bank.........

 

[hottscennessey]

I would think the BPV on the compressor charger would be useful in conjunction with a BOV on the cold side.

Only on the hotside, air has to move backwards through the system, possibly distorting flow.
Only on the Cold side, air originating at the turbo, wasted in that it won't be injested by the motor must pass through the intercooler, causing unnecessary heat to be transferred to the intercooler before it can be released to the atmosphere.

IMHO neither makes that big of a difference on a street car, but still interesting to think about.

 

[WhtMa71]

And what happens to the pressurized air in the piping & intercooler.......
Does it majically dissapear ?

No, but it might magically disappear.... I think borg warner might know a little more about turbos that you.

 

[mk3_7m]

Found an interesting info in the following link

http://forums.bimmerforums.com/forum/showthread.php?t=1643932

 

[RacerXJ220]

BOV on or near the turbo is the best place for it. It makes no sense to me, even from a physics point of view, to put a BOV as far away from the source of pressure as possible.

 

[Smartparts]

Ill be running one of the new BW s300sx on mine once I finish the build.