To keep gas speed up. It does help more than people think.can i ask why you say reduce size after split mine is the same size through out , and it holds its own on the street
Fitting a smaller exhaust than the OEM standard one will certainly not help at all.Reducing the pipe size may do many things but speeding the gas up certainly isnt one of them. Try it with a hosepipe using a reducer
The Thiele-Small parameters are applicable in turbo as well as in N/a applications.High power exhaust system are very complicated. Back pressue and gas speed both count
Lastly different engines demand different calculations epecially when a turbo is involved.
So much so that they are worked out on a computer for best results and are way beyond most people ( inc moi )
One thing I do know though - racing exhaust are larger than non racing ones
Sorry I don't quite understand, can you explain in laymans terms CP as to what the different lobe separation of the cam arrangement - means please? :embarrest: Thanks.Force induced and n/a exhaust have several things in common. One thing they differ is that n/a engines rely on the scavenging helped by the exhaust design, which force induced engines do not need as the boost takes care of it resulting in a different lobe separation of the cam arrangement.
Sorry.Sorry I don't quite understand, can you explain in laymans terms CP as to what the different lobe separation of the cam arrangement - means please? :embarrest: Thanks.