Things we learned on Dyno & 03 555 HO

[JCleary]

Ah HA! DLeno and HasselBach make good sense. So then I was right originally... TCluff's equation implies increasing backpressure would increase mean effective pressure, which means you'd make more power with a more restrictive exhaust?



[The fact that cylinder pressure equalizes to boost pressure is so obvious it never occurred to me. ]



-Ryan

Sort of. You can increase torque at a low rpm, but once you transition into high rpm, you need good airflow to produce hp.

 

[TCluff]

Ah HA! DLeno and HasselBach make good sense. So then I was right originally... TCluff's equation implies increasing backpressure would increase mean effective pressure, which means you'd make more power with a more restrictive exhaust?



[The fact that cylinder pressure equalizes to boost pressure is so obvious it never occurred to me. ]



-Ryan

i never said restriction in the exhaust side produces power, i too did not bring the lobe overlap into the equation, i am sorry for the confusing info as you can tell, it can mean a lot of different things :-{}

 

[Devan Manis]

Sort of. You can increase torque at a low rpm, but once you transition into high rpm, you need good airflow to produce hp.

This is only true on naturally aspirated engines.