you use awdtuning?My car isn't put back together yet. I have to wait for my guys to get back from Pikes Peak, assemble, then break in and tune. The only other Subaru I've found running a GTX3576r looks to be hitting full boost around 4800rpm on the dyno.. should be earlier on the street. I'm hoping to get it down to around 4250rpm on the street since I'm running a Tial .82 A/R turbine housing. The Garrett T3 four bolt .82 A/R housing that Gleep is running isn't going to spool as well as my Tial housing, but then again he has dual AVCS heads and my car is non AVCS...
what did you like about the fp red? and why would you suggest the 3071 over it?The FP Red 76HTA is basically a stock location Garrett 3076 with a 76mm HTA wheel instead of a GT or GTX wheel. The HTA wheel is billet aluminum, like the GTX wheel and is also designed to be more efficient at higher boost pressures. I don't know how the weight compares between HTA and GTX wheels, but I would guess they're pretty similar. The HTA wheel is slightly smaller than its counterpart GTX wheel, but unfortunately Forced Performance does not release compressor maps for their turbos, so we don't really know how the HTA wheels flow compared to GTX wheels. The design is slightly different.. the GTX wheel has 11 blades, whereas HTA wheels have 7 blades. The main difference I've seen people reporting is that turbos utilizing the GTX wheel are very quiet and turbos with HTA wheels are very loud, like diesel truck turbo spooling loud.
I'm not certain of the HTA wheel in the new Green. If it's the same size as the Green they make for the Evo then it's a 73mm compressor wheel.
Really, without compressor maps on the HTA turbos and no back to back tests comparing them to GTX wheels there's no way to tell which one if going to spool first or make more power. The GTX3071 will spool earlier than the GTX3076 and make less power. The FP Green HTA will spool earlier than the FP Red 76HTA and make less power.
There are a lot of other factors determining spool and power, so it's a toss up. For what it's worth I was going to get a Red 76HTA before I decided to just get it over with and go rotated.
as a side note, i emailed all 3 companies, and have only heard back from fp.