Exhaust flow talk

[oldeskewltoy]

great discussion!!!

BenR Wrote:At lower rpm the window of time during valve overlap is too long, and with high specific output engines you always run generous overlap. Where at high rpm the overlap helps, at low your simply reducing the dynamic CR by bleeding off cylinder filling, and this reduces torque. The lower back pressure allows the bleeding to happen more efficiently in the same time frame, hence you feel less torque.

What is best described as a peaky engine....... why I argue for street power as opposed to all out peak hp...