Been driving a minivan for 2 years.
Just got the suspension pretty much wrapped up on a 2013 STI (didn't get a GTR, not cause of money, but because it didn't work for my life). I have a FR 6758 kit sitting at a parcel warehouse just south of the 49th. I plan to get it in 2 weeks.
My set-up will be fairly simple, but effective I hope:
-pump gas
-ID1000s
-DW pump
-Perrin inlet
-AP ATR
-FR 6758 kit w/ their not really 1.5 scroll header (just like a Perrin header, but thicker) c/w HFC (heat-coated and wrapped)
-Maddad Whisper CBE
-KStech 73mm CAI
And I think that is it:
-stock TMIC
-still have TGVs
I kinda think that the 6758 will spool just as good as a VF52 (for you LGT guys). Perrin's test seemed to indicate that, and there was probably an issue with the TGVs, but maybe not.
At any rate, even if it spools slightly slower then a VF__ I think it might actually feel better. What? Let me explain.
Just because on a long run in 3rd gear XX turbo reaches XX boost at XXXX rpm, doesn't take into account the turbos rotating assembly's mass. With the EFRs much lighter turbine wheel, it should react faster. This may mean that in 2nd gear or 1st it reaches XX boost faster then a VF__. IDK for sure. It may also mean that it responds faster, so you are in traffic at 25 mph in 2nd then go WOT, maybe it will react faster then a VF__.
Hard to say for sure, but I intend to display all results.
I have a local with essentially the same car (stock turbo, headers, CBE, stage2.....) and we will do back-to-back road logs, same day, same weight, same gas, same tuner, (me) etc......
If the 6758 spools the same, I will show that. If it spools 200 rpm slower in 3rd gear, but yet feels better. I intend to figure out a way to consistently log that and show why.