Originally Posted by robthezombie
Id like to be able to learn this machine so I understand how it runs and runs most efficintly. So ive been reading around on here about back pressure and how it affects the bike. Im not a mechanic so I dont fully understand the whole issue. So I would like to propose some cases and hear what you think. Does the muffler, honeycomb, or both add to the backpressure?
1. Megaphone exhaust (Hotbodies) with a y-pipe and cats removed.
2. Hotbodies exhaust with y-pipe, but honeycomb still in.
With those two set ups would it be wiser to keep the cat to have some backpressure or does it matter?
I know this exhaust basically has no back pressure so I used it.
I appreciate anyones help trying to figure this out.
dont quote me on this, but this 'back pressure' is created by having an exhaust header attached.
If you were to run with your exhaust off, the exhaust gas would be free to exhume into the atmosphere with nothing affecting the flow other then the valve.
when a exhaust is attached, the gasses coming out, must push all of the gasses already filling the exhaust, which creates pressure, like blowing through a straw.
any aftermarket exhaust system will create a small amount of 'back pressure' so your good a ny way you choose to go, although removing the catalytic convertor, will cause the bike to run with incorrect AFR, so fuel management (like the pc3) is recommended.