[ozinaldo]

Originally Posted by solstice

Thanks!

With that picture combined with the Dyno chart I think it's safe to say that this engine will act like a typical FI engine in terms of power delivery across the rev band.

With a 7500 rpm redline it looks from the dyno chart that plots the S65 on it as well that the power plateau should be around 5500 rpm. I.e when power stops building and maintain hp until redline. The quick run to peak hp and the square tq curve will make for a very fat midrange but the car will not be very exciting to rev past 5500 or 6000 rpm, max. The ferocious pull to redline from the S65 will not be there.

I.e much more S63TU than S65 as expected. No surprise here.
Remains to see if throttle response ( I inlcude all type of lag from throttle to engine response in "throttle lag" ) will set this engine apart from a typical FI engine.

My thoughts exactly. This engine is going to deliver and feel exactly like +500 rpm and +20% more peak power 1M (N54T).

Our redline is at 7000, power plateau is around 5000 and in terms of excitement there is not much past 5500 or 6000, despite the fact that it can hit the rev limiter pretty easily. It just is not that exciting to do so, in comparison to gobs of power available at low and mid range revs which is stupid fun!

It really sounds to me like a very well tuned 1M engine with an extra 500 rpm on tap. I am not talking about other new stuff and enhancements like in the cooling.

I bet the throttle response will in practice mimic the M button in the 1M as well (controlling wastegate, a different map) for sharp response , which I posted before as being NOT as natural as a good NA engine, like the S65 because it may be oversensitive and jerky at times. But maybe they fixed that too. S55 might just be the best FI engine in terms of response, as you defined it, since 1M was already very good compared to others, including other applications of the N54.