Originally Posted by Curran
Went through your whole thread, maybe I missed it but are you using USDM twins for your "top secret" manifold? It sounded like your using the stock fuel rail but it looked aftermarket? Nice Christmas present.
I'm going to require a garage sale when I'm done.
I've changed a few things along the way, and have various parts lying around. I upped my horsepower goals, and was originally going to keep it simple to match horsepower to the stock transmission for a few years. That's all been ditched, and now fuel rail is aftermarket, and the fuel lines/ pump hanger/triple plate clutch/ V160/etc. will all be able to support me as far I would conceivably want to take it and still keep the torque that I'm after.
I also wanted to use the USDM manifold more than the turbos as it is slightly larger inside than the JDM manifold. I had laser cut some custom flange adapters for my new turbos. But, once the engine was in, it was pretty apparent the rear fire wall wasn't going allow me the room I wanted and I would have to build the manifold. It's a positive from a performance aspect as the exhaust side is routed better, internally it transitions much nicer into the turbine with less restriction, etc.. The manifold is actually pretty boring otherwise, only keeping it secret so guys don't prematurely guess the turbo choice based on the flanges. Once it's dynoed and running, I'll post up more details. Have to learn to weld aluminum for a couple items and then I can finalize bolting things up.
As for the turbos flow potential, current target is 600whp with more boost and torque prior to the transition than what other setups are seeing right now. Stock block, head, etc.. The earlier port work has been shelved until I decide how far I want to go.
Quite a few little differences from what guys out there have currently done. I have two internal wastegates with a turbosmart actuator on #1 that provides a little more travel and should be more consistent. Using an external wastegate for my EBV. IACV, and EGCV been cleaned up with some porting (as noted at least with IACV above). The back sides of the turbos were a PITA as well, but are much better than the factory castings. It was a fair bit of effort incorporating mandrel bends into the EGCV and exhaust but does leave a pretty direct path out.
If I can get the time, I will start it up by christmas and aim to drive it this spring/summer.