I have been trying to enjoy the car while the weather is nice... taking it out daily running around 26-30+psi on mix of ethanol (a lot more than dyno day). The power delivery has been super enjoyable. Such a killer street set-up and as long as its at a normal cruising rpm there is an extra atmosphere of boost being crammed in within the amount of time that it takes for my foot to travel to the floor. Even 1 or 2 gear stop or roll races at low speeds, I haven't been disappointed... including some GTR and some dude on a crotch rocket that I had to let off given where he was and how the lane was ending.
Kind of a funny incident off a light the other day... there was a guy with a very sweet new 550hp Range Rover that asked 'if my car had a turbo'. I didn't bother to mention how many, but just said yeah it does. He asked to race, and after looking at the light and nothing ahead, figured we would have room for a quick gear or so. I was a little concerned about that Range Rovers 4.5 second to 60, but I've logged sub 4 seconds to 60 in the ECU so I was curious to see how it would turn out. I could see him brake torque before the light changed... so I put it in second, launch control timer - 2500rpms launch limit (fastest way I found for me to hit 60), light goes green I let out clutch and the giant $120,000 behemoth shoots about half a car ahead first 60 feet with AWD and ton of torque.. the proefi/launch limiter/and pilot super sports on my end were working for it but holding up admirably. As traction became better stabilized I gained that half a car back going through transition from 1 turbo to two turbos and then it wasn't much of a match on the power/weight front after that. Gave each other a wave after, the guy was pretty good up front about it and after.
The nice thing with the launch timer is that I can limit rpms prior to ECU having to intervene but takes some work to setup. After 25-40mph I let regular traction control take it from there. It's really one of those newer ECU features you just have to own to appreciate.. having it allows me to keep my foot down and control wheelspin to a reasonable amount, without killing boost like what would happen getting on and off the throttle. Also it's nowhere near as invasive as factory traction control since I can set whatever wheel speed differential works for my tire setup and it won't cut throttle
I don't think I posted this in the past, so here are a couple of 3rd gear logs that show the wheelspin without traction control and then with traction control built into the ProEFI. The first one, the rear wheel speed has gone vastly ahead of front wheel speed and is close to a smoke show at that point (red and green lines should be spooning each other). With a warmer road and tire, 3rd normally isn't so bad... but this was a good day to illustrate the difference.
And then with traction control active, the red line starts to jump away from the green line, but the ECU does it's magic forcing the red line to go back and hump the green line. All the while, my boost is flat, my foot is flat, and it's maximizing how fast it can go for me. Traction control that makes sense... ahhh..
All of that said.. the downside to having lots of torque and trying to maximize that torque with traction available?? I suspect that I busted my diff yesterday. On decel, pretty serious noise popped up every few feet which sounds like a broken or bent tooth on one of the gears in the back. Diff oil was shaving free, so I'm going to drop it and see if I caught it early enough to just replace gears. If not, I may end up parking it a little early for the winter and start on the next phase of suspension tuning/figure out diff options/etc..