My cousins Hellcat Charger Redeye made 1030 whp on 93 octane on a dynojet tho not a Mustang Dyno. It wasnt stock of course it has thitek heads, custom cam, kooks headers, meth, F1 Stage 2 chiller upgrade, 1300's, BAP and a 3.0 whipple so it is possible but like u said tons of variables. BAP is for E85.