I’ve personally used the Borg Warner EFR series (the 6258) and the performance is incredible. I’ve never actually driven anything that has spooled so well and so quickly. It completely changes the driving characteristics with the amount of torque you get from these EFR’s.
I suppose the downside is they use dual ceramic ball bearing housings. It’s how they spool to fast. If your turbo fails, it’ll be very hard to find anyone that rebuilds them.
They are a good bit larger then the gt2871r you've been running. The twin scroll version- probably not much more lag then you've already got. Just an extra 200 hp.
i love my gt3071 v2 billet blade upgraded by arnold at pagparts.com i also have arnold's .72 a/r exhaust housing... and i rev out to 7800rpm... it pulls great
Somedays I wish I went with a 30series, but so far very happy with my gtx2867. Sure it could be the bigger gt30, but am happy with my lil gtx.
The heart of the CTS Turbo MK6 2.0TSI turbo upgrade kit is the Borg Warner K04-0064 turbocharger. This turbocharger is commonly used in OEM applications such as the Audi S3 available in Europe. The highlights of this Borg Warner turbocharger in our kit is the 'forged mill' compressor wheel, which brings numerous benefits to the enthusiast. The technology used in the production of these turbos provides us with a variety of benefits, reduced compressor wheel weight (faster spool), increased strength, and greater surface area of the compressor wheel. Because of the 'forged mill' technology Borg Warner can increase the effective surface area of the compressor wheel, which results in greater air flow than conventional cast compressor wheels.
I chose the gtx2867. it fits the bill so well.
You could probably get pretty close to your goal with a Borg Warner EFR 6758.
I had this for 5000 miles and I'm ready to upgrade to a GT3071R...I was able to get 317 hp and 338 lb-ft of torque with the GT28RS...the GT28RS was very fun, good power and quick spooling, but it lacks power up top, like in highway driving or long straights.
IMO, the minimal increase in power is not worth it. I wasted countless time and money on this turbo and was disappointed in the end. I have since stepped up to a 28RS and am beyond please with the jump. Spool time on a small frame BT is minimal, and 300whp is plenty streetable no matter what some say. I have a k04-001. With meth, I put down a reliable 225whp all day long (and that's on the ole' heartbreak dynodynamics dyno). She holds her power, too; peaks way later in the rpm range unlike the wily k03s, yet is still @20psi when you turn the key. Is it fun..yes. Is it worth it monitarily...meh. At best, it makes for a great auto-x setup. Don't expect to do much damage beyond 3rd gear, though. I will be upgrading in the near future to a T3s60 or 28RS if that means anything to ya. I've had this setup for less than six months, and expect it gone within the year.
the ckra turbo is absolute garbage. You need to have an upgrade in mind because it's not about IF it'll fail but when. Regardless if it's stock or tuned. It just sucks.
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