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Glad it was that simple ! Does it now rev out fully and with decent power to 6.8k? Yes now it revs pretty good to 6800rpm. Thanks to you! :) I also have some other problem with my car. When you accelerate hard with 3. or 4. gear it starts miss firing(?) in the high revs. With 1. or 2. gear it doesn...

Here again. Check soft limiter isn't accidentally set at too low rpm and pulling lots of timing out. (bit obvious but worth a check) Yes, thats a bit obvious but that is main reason for that problem. Soft limiter has set 750rpm before hard limiter (6800rpm) and i dont know why... I set it in 100rpm ...

Fuel pump not delivering enough? But 239 bhp with a standard engine is not that bad. Yes, fuel pump might cause this problem. Have to check that. Yes an air/fuel ratio plot would help. I dont have AFR map at the moment, but i have to check that also. Maybe cam timing should be checked as well. BTW ...

I have 3.0 24V engine in my 75 with Megasquirt 3 and it "dies" after 6000rpm. Do you have any suggestions, what can cause this kind of problem? Only modifications are: MS3, 45mm inlet pipes, airfilter and 2.5" exhaust (original manifolds) Here is dyno results. 239hp@5900rpm / 290nm@48...