Former Foz Dude
2010 WRX STI SE STI 6-speed, yo
Ya the biggest thing I miss about the TD04 was the spool. My 4EAT with a VF39 takes forever to spool... But second gear... Watch out...:icon_rolleyes:I wouldn't call it "big" but it feels great!
If I accelerate slowly it feels almost the same as stock. Any time you get on it, though, it's a significant difference. I would say that there is a touch more lag, but it's not a lot. Once the VF39 spools up it simply pulls harder at all times. There is a lot more torque and you can feel yourself being pushed back into your seat. Keep in mind that I also did the DP at the same time so some of my newfound power is not just from the turbo.
I was slightly hesitant about switching turbos since in some ways the quick spooling TD04 is a good match for the 4EAT. It's only been a day but so far I think the tradeoff is well worth it. Yes, the TD04 get you going quickly but the power delivery is a lot more peaky and it only hits hard very briefly. Even though you can't choose your shift points with the automatic it still makes good use of the VF39's powerband when you want it; the power is both stronger and much smoother.