[Irace86.2.0]

Also, this post of this thread had this link, which showed the dyno below for a slightly modded WRX throwing down decent numbers on 93 octane.



That post led to this response, which I'll quote anyways:

For what it’s worth and more from a holistic perspective... the final tuning work was recently completed on my engine. Since I was going to use 91/94 octane (no e85 in my location) The builder/tuner had decided to proceed with 10:1 to maximize long term reliability and detonation protection. I was initially concerned about how this could affect off boost performance, however Final tuning dissipated all my doubts, the car performs amazingly, with power delivery being just as gradual as before, with essentially no lag at all. The car is simply mind boggingly fun to drive, and they we able to bring TQ about 400rpms earlier than before in the low end, as well as achieving a higher tq plateau (up to +60lbft @crank) across the entire mid/top end as well, resulting in lots of extra “area under the curve”. The garrett gt2871 was able to maintain steam to 7500rpm. Note that I was not seeking maximum top end power, but just more usable tq across the entire range for daily driving with the odd hpde. My low boost 91 map now has higher tq across the entire rpm range than my previous stock engine high boost 94 map, with the rest of the setup and unchanged. So for those not going towards higher octane fuel, my feedback on those considering lowering to 10:1 cr would be that very satisfactory results (for my goals) was achieved.