I can't believe how much timing this engine likes on 93 octane. Holy crap. You'd never get away with this in boost. Between that and tuning the injector timing, I found the "handful" of torque that the old motor had. Revs get more and more snappy as I figure out the combination. The torque also feels chunky again, like the 2.5L did. It's fun to drive even without AVCS hooked up. I can roll into the throttle and screw with people in gear like the old motor did .
It's a lot easier to drive on 93 than E85, but I hadn't rolled these new tricks into the E85 mapping. The adjustability provided with the software is letting me dial things in to a very fine degree and clean up the fuel mapping. The twin throttles are still very forgiving. I have to set them right and then they're happy, instead of constantly having to sync them like ITBs. I have to find what the engine likes since this all completely new. There's a mix of radical and conservative in it. The mechanical compromises are there to maximize the fun and ensure longevity. The ECU tuning lets me smooth it all out. I've put about 2,000 very forgiving miles on the combination. Mileage hasn't been too sharp, but I'm working on that.
Last edited by ImprezaRSC; 08-08-2016 at 08:41 AM..
Here's some mile acceleration testing. Crank up the sound . I think you can see the potential with the combination. Once the redline is raised, all that shifting becomes unnecessary. It's still a little mismatched without a higher redline.
My latest 93 tune is the 2nd mini clip with a little more midrange timing and better fuelling. I'll make an E85 clip sometime soon. There are a few tricks in this tune that aren't in the E85 tunes.
One of the bugs I have been chasing is this bog at low-mid rpm and high load. I was a pansy and not adding timing due to higher compression. Man, was I wrong. This combo likes a stupid level of timing on 93. This map has more spark timing than it did on E85. It's a bad, bad girl. I was keeping timing out of it in high load situations and it just wants more.