Originally Posted by Ws6
Originally Posted by gathermewool
Originally Posted by Ws6
Originally Posted by gathermewool
Ascent vs FXT (WRX) turbo: I have this in my notes:
Ascent: Honeywell MGT22 turbo
FXT: 14411AA881 Garrett Honeywell (AR 60)
- Garrett MGT2259S
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I doubt the next STI will have a laggy single-scroll snail. The twin-scroll in my FXT is freaking awesome!
Doesn't even need to be twin scroll. There are other ways around it. Regardless, the current STi has a nearly 2 decade old motor. I have no idea who at Subaru has been asleep at the wheel, but the car veered into the cow field about 10 years ago.
Are there any options that are cheaper? I always assumed Subaru chose a twin-scroll turbo, which I assume costs more, because they needed to reach a power level and knew mainstream Forester buyers considering the FA20DIT wouldn't accept EJ-level turbo lag. Same goes for ALLOWING 87 AKI fuel.
I'm not very familiar with how a hot and cold turbine size and geometry can be designed to provide high levels of power AND not lag.
As-is, the twin-scroll in my FXT is about as close to lag-free as I've ever experienced, especially at highway speeds.
Mazda has a pretty neat design with my cx5. It literally has no lag. 310 pounds of torque by 2000rpm. Basically, they restrict airflow through the manifold to the turbo at low rpm to increase flow velocity. Also, they maintain cylinder temps with a cooled EGR and header scavenging, which means not dumping tons of fuel for cooling, and the ability to run 10.5:1 compression and still push 17psi on 87 octane, safely, hence why I am getting 27-29mpg in daily commute and 28mpg on road trips with the same horsepower and a lot more torque and a 6 speed auto vs your cvt, and forester 2.0xt owners I know are getting a few mpg less, cvt not withstanding.
If YOUR CX-5 was available when I got my FXT, I might not have gotten my FXT. With that said..........visibility.