Zax's 2015 WRX STi BS build thread by zax

2 minute(s) of a 16 minute read

Thanks! I started playing with the DCCD throughout the day. During most AutoX runs I leave the center electronic diff fully open relying on the Torsen mechanical diff to shuffle power front to rear. This usually helps because the courses are very tight and technical and I prefer that rear bias. This particular course was quite fast and open, and I noticed my tail was very happy through many of the sweepers. I tried the DCCD in full open, Auto- and Auto. Auto- yielded the best result and allowed me to power-on very early in the corner without washing wide -- something that the WRX would have never been able to do. This was the first time I really experienced the flexibility and superiority of the DCCD drive train in Motorsport.

I think for me, I prefer full-open for very tight and technical courses -- courses that feature walloms, hairpins, chicanes, and decreasing radius turns. The lack of lock-up helps the car to rotate.

For more open courses like this, the cdiff lockup definitely helped to keep the yaw under control, particularly through the sweepers, increasing radius turns, and slaloms.

In short, I think my cdiff setting will depend on the course features. It's quite neat that the STi drivetrain is flexible enough as to change the character of the car on the spot.

I want to stay in BS for now I think, so tires and a sway bar will come next.

6-16-2015

So this came in the mail today:

7-13-2015

Thanks Stan!

8-18-2015

I'm a bit slow on the uptake here, but oil was changed last Friday 8/14/15.

Oil: Rotella T6 5W-40

Filter: Purolator L14615; bypass pressure 16-28 PSI 

Mileage: 12,843 (2900 oci)