My motor is for the most part stock. Aside from the EGR blockoff, throttle body coolant bypass, and colder plugs... All I have different from the stock kit that makes a difference is the full MSD ignition and a custom 2.5" exhaust. (Downpipe did not bolt up to the factory exhaust location)
I do have a VAFC that was used to more precicely dial in the fuel and VTEC cross over, in conjunction with the ERL MF2 included in the kit.
Conservatively tuned, I ended up with 199.8 fwhp. I say conservatively because I kept it at 6psi and it's still running on the rich side. I want to have it leaned out a bit more, which I know will free a few more horses, but I am very happy with how smooth and linear the powerband is. The system starts spooling about 2500rpm, full boost by 3500 or so. The dyno plot looks more like a SC than a turbo with plenty of area under the curve.
Keep in mind that this was on a resistive Mustang Dyno, not an inertial DynoJet. From what I have been told, there is about a 15% difference in numbers between the two. That would put it closer to 230fwhp, but I don't have the dyno plot to back it up.
I would guess the full 8-9 PSI that the kit is advertised at, and more aggressive tuning, will get you the power marketed, but I chose not to push my luck on stock internals. I'm not ready to build the motor yet.
Other points to mention, I added some 90deg elbows to allow the JDM foggies to stay which resulted in more pressure loss at the manifold. 9psi spring got me 6psi at the manifold. I also chose to install an AEM fuel rail opposed to cutting the factory line. Pressure drops to 5psi in VTEC because of the overlap in the cam profile. I estimate a good set of turbo cam's would have a large effect on the power.
Still, over all, I would say I am very satisfied with the kit. Taking into account some conservative choices I made, I think the results are on par.
Hope that helps -Scott
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