BorgWarner EFR Turbo Tech - Twin Scroll Compressor Housing

[@mattmorrison6958]

More about blowdown interference- separating the cylinders that can push exhaust into another. The boom boom boom happens either way, just more mass flow to drive the turbo due to less cylinder contamination/residuals (and shows up in VE too)

[@milano0o99]

i like the boom boom boom 😅

[@lalito._.01]

Does this limit power output at all? Id imagine the twin scroll could act as a bottle neck at high rpm

[@motoiq]

The AR on a twin scroll housing is usually bigger

[@seanmabey1609]

How much does ball bearing vs journal bearing effect spool?

[@motoiq]

Ball bearings spool up to 20% faster.

[@alexwhite176]

I thought 1 &3 went together since 1& 4 are next to each other in order so there's no pulse competition

[@motoiq]

It's a flat plane crank.

[@joshj7593]

How can I use this with a 5 cylinder such as an 07k? Or would it be better to get an AGP v band hot side for the EFR turbos. Since the firing pattern is different than that of a 4 cyl / 6 cyl

[@dee1089]

my suggestion.. contact borg

[@joshj7593]

@ They are no help unfortunately. I think it’s best I go with a custom designed turbine housing due to the firing pattern of the 5 cyl to support twin scroll. Have no idea what company to reach out to though

[@mattmorrison6958]

Can't effectively separate/pair the cylinders and usually use v-band. Iroz did some interesting stuff with 5cyl and divided T4 as a "variable AR"/quick spool valve, but more of a cool tidbit than suggestion

[@motoiq]

Probably not as intended.

[@DJToneRI]

Discreet or distinct 😂

[@motoiq]

It is discreet.

[@STiHigh1]

@DJToneRI. I think he said "discrete", not "discreet". Google discrete vs discreet. Discrete: Means separate, distinct, or individual. It's often used in technical and scientific contexts, such as mathematics and research. For example, you might describe a computer's graphics card as discrete if it's a separate graphics processing unit (GPU) and graphics memory. Discreet: Means cautious, unnoticeable, or inconspicuous.

[@DJToneRI]

@@STiHigh1 well shit. Learned something today. Thank you

[@STiHigh1]

@@motoiq . Or, maybe "discrete"? 🙂

[@STiHigh1]

@@DJToneRI. No problems. 😀

[@waynelsexton3488]

Diverse not discrete

[@manoftehsea]

Discrete is an appropriate word here.