Quote Originally Posted by futurevr4man View Post
The turbine housing itself is supposed to flow MUCH better than the TD05's as well.

Serge, I 100% agree with the way the wastegates are merged back into the manifold being a crap design.
Quote Originally Posted by Streamln1 View Post
There is a lot of debate going on in regards to spool time with the 68hta. But I hit full boost currently at about 4200, and they are coming on hard by 3800. Most of the dsm guys are reporting little to no lag difference with the 68hta. Granted that's on a 2.0-2.4.

The way my 16gs behave at higher boost suggests theres something going on with the exhaust velocity IMO.
I think you're both looking at a similar thing here though: The existing WG design is garbage for the most common manifolds in use (3SX old ones and IPS.) I haven't had a chance to get my hands on a set of DR, DNP (although 3SX original manifolds were based off of DNP TD05 manifolds) or the new 3SX (I may try to take a trip over there this week to get a look at them if they have any on hand, but they use open dumps so not a great comparison.) WGs dumping AT turbine wheels and at bad angles is a recipe for poor flow, basically leading to the turbine wheel having to fight itself to flow. Probably as much of a reason for performance gains with open dumps on this platform as the effective exhaust diameter gain from doing it.

I'd say a large part of the real benefit of the FP turbos is the improved turbine housings coming in at 8cm vs the 7cm of the E3 housings, it's a fairly substantial improvement for high RPM/high PR situations. That said, I thought (and could be wrong) that the 68HTA offered an improved compressor housing as well?