08-03-2012, 09:16 AM
|
#5 (permalink)
|
|
A True Z Fanatic
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3596
|
Quote:
Originally Posted by KingJoseph
So, it sounds like with less cells on an NA engine, I'd be sacrificing some of the powerband for a minimal HP gain. Am I understanding that correctly?
|
More or less this is a correct approximation of the situation. Within reasonable design limits, if you remove some restriction from the exhaust the torque peak moves upwards in revs. Since HP = Torque*RPM, this increases "Peak HP", but that peak will come at a higher rev than before. That doesn't necessarily mean you improved the total area under the curve on the torque graph, depends on a lot of variables whether a given exhaust change does that for the rev range you care about.
Most people driving on the street will dislike a change that pushes the HP Peak up the graph, because they spend most of their time in the lower rev range and it'll feel like a loss. On the other hand at the track I spend most of my important engine time in the 4K -> 7.5K range, and below say about 3K RPM I just really don't care if my torque drops off sharply, as long as I get solid gains in the range that matters to me.
Last edited by wstar; 08-03-2012 at 09:20 AM.
|
|
|
Similar Threads
Threaded Mode
