A c5 allroad with a 3 plunger pump, gtb2260vk hybrid turbo and bosio race 683 nozzles will upset a Sachs sre clutch to the point that dmf and prop shaft will vibrate at anything under 1600 rpms ! I had such car running over 300-350 Bhp and trust me- there is no point going twin turbo !
Not talking old VE POS v6 I would be going CR 3.0TDI likely from a B7/8. I'm also not talking 300hp that's nearing the gtb2260vk limit. For twins there I'd certainly be looking at like a gtd14-15 not the gtb17s.
I'm talking higher HP like 400-500hp. You know where I'd be looking at something like DSDs GTD2872VRK or HE35. Stuff that isn't ideal on a small 3.0L engine. I'm talking like 200+ per bank, like the ALH norm. GTD1752VRK seems to be working pretty well for the 1.6TDI crowd. I do understand the differences between the two in this comparison. I actually think a pair of GTD1752VRKs on a 3.0TDI would be a great although not cheap upgrade.
I am really looking for if the currently available systems could control 2?
I am fully aware of the reasoning, logistics, packaging, etc of a twin turbo system. I'm not really asking if it should be done, but can it be with currently available tech?
@diffas I really am curious how the GTD1752VRK would be as twins on a 3.0TDI. From most of the 1.6TDI dynos I've seen they have like 120-150ft-lbs of torque at 1800rpm. The 1.6TDI also naturally isn't a torque king being a square engine with an 80.4mm stroke. That should shift the torque down a little from where it is on the 1.6TDI, but the fire rate and slight decrease in displacement will reduce spool a little.
Dark Side Developments (DSD) has gotten a 1.6TDI with a GTD1752VRK and 50% OS injectors to do 232HP/340ft-lbs. It peaks at like 2900-3300. So if a destroked 1.9L 16v I4 can do that I'd hope one on a 1.5L 12v I3 could do like 200/350.
Again to clarify I am not looking to replace single for twins at 250-350hp. I am asking for 400+hp where sizes start getting big fast.