Ball bearing turbo will reduce lag by at least 500rpm.
But Ball bearing turbo price are expensive and also expensive to service.
However Ball bearing is the future of turbos.
V6 Twin turbo engine using Twin TDO25 turbo rite?
How about ponk in a single TD05 turbo from VR4 or a Twin fin TD05 from EVO?
I don think there will not be lag because all 6 pistons are blowing into 1 turbo.
Once u change turbo size, the pipings defiantely have to re-do.
While you're at it, why don't do FMIC and piping as well? (VR4 I/C about RM500)
TD05 turbo from VR4 very cheap, easy to find and cheap to service.
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