So the weekend was full of me sleeping (well, to be honest, kayaking). I am uploading the video clips to youtube right now but our internet has been pretty uncharacteristically slow today.
I'm also compiling the details on the catless header. Made more power in the top end of the powerband, but less at the low end. To the extent that the catted overall is a better design in our opinion unless you're revving out to redline and shifting every time. If you're doing that, you'll pick up 6hp/6tq at the cost of 10ft lb at the low end and 8hp at the low end. That being said, we believe a change in primary/secondary sizes with the catless design may be able to get the best of both worlds. We've also been busy trying to get some traction on getting our own BRZ or FRS here. Looks like we'll have one in either the next few days or the next week or two. Pretty stoked about that. I'm putting together some dyno graphs to share later today. We also had some success with a replacement intake pipe (made 3whp consistently replacing the factory hose with a stainless intake pipe and retaining the factory airbox/filter). I'll be sharing that detail in another thread.
Here's a pic of the intake pipe (hella jdm, yo):
Will post shortly, waiting for this youtube vid to upload and headed to lunch in the meantime, will be back here afterward and share all the dyno details. The long and the short of our results at the dyno are that we think the smaller primary setup may work better in catless form to retain the low end torque and add the high end power as well. That'll probably be next. Also considering a long tube 4-1 design still. Will also start that with 1.5" Primary and step it out to 1.625 or 1.750 (triple stepped design).
Sorry for the radio silence, we're working on a rotated turbo kit for the STi this week and have a lot of irons in the fire, but we're committed to continuing our development pace on the BRZ as well. Very excited to get our own car in here for some higher end developments and suspension/chassis testing.
Jason