Went on the Dyno today, basic 5.7L

MOPEkidD-3 said

Also did you modify the transmission so you could powershift it like that? I thought that kind of thing only worked on old-school 4-speeds lol.

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No. ECU cuts power when I touch the clutch above 4,500rpm and 80% throttle. Power is progressively returned, it's actually quite easy on the driveline but the air going through the engine never slows down, so it picks up the next gear quite well.