I just got done dialing the car in with this new 6870 cea turbo. Boost is at 28 psi & a/f is at 10.8 with alky. My car is & feels noticeably faster & it spools just as fast as my 6766cea journal bearing turbo did. This turbo makes a lot of power and is still fun & zippy just flat paddling the car . It's really amazing how a turbo this big and powerful can turn on and spool so fast . I sacrificed nothing and gained more power all around . I would highly recommend this turbo to any one looking to upgrade from a smaller or older turbo. This thing turns on as fast as my buddies TA49 it's just truly amazing and it makes a lot more power and hits even harder than my 6766 cea did .& NO I DONT need anymore converter . My same converter stalls @2800 at the bottom of 0 psi & @3175 -3200 at the top of 0 psi. The turbo is great flat out . My chip is at its limit now after dailing this turbo in . I had to set my over all fueling at 149 . And then I had to set my first n second gear fueling down to 103 to achieve my 10.8 a/f ratio . The car felt its fastest to me at 10.9 a/f. Timing was at its default setting 23/21 . So next I'll be ordering a new chip from Turbo Tweak. And at this power level I highly recommend a 6.1 chip or a FAST. But a 6.1 chip n powerlogger at minimum.
I personally would go to a fast xfi will that power level. You will be able to fine tune it even more and really see what that turbo can do. Good luck man
