I recently swapped back my stock axleback muffler but still have my aftermarket header, and exhaust piping. I was wondering instead of buying a "quieter" muffler would placing a "small" gap between the axleback decrease backpressure?

I was thinking it should because now the gases will be exiting from this gap as well as the muffler. Or will it actually hurt the performance because the leak will cause turbulence?

Just trying to find an alternative to something that flows better than a stock muffler but without having to replace it.

Any insight would be great.

Thanks

 

I woud think any exhaust leak will show a loss in power.

 

There really is no such thing as backpressure. if you want to keep the stock piping and increase performance you could just take off the stock muffler, but i don't know how quiet that would be? There are many things that flow better than stock but you will have to repalce the stock components. I don't know what you are hoping to acomplish here??

 

There is such thing as backpressure, and it's bad, unless you have a 2stroke. The gap you are talking about will cause "turbulence" which will show a loss in power.

 

Yeah, that's exactly what I was thinking since the gases will not be exiting out in a smooth line as they do in an exhaust system without a leak.

 

Yeah, just because it's more open doesn't mean you'll have less pressure. Turbulence created will only slow down the exiting of the gasses. Not to mention, it isn't going to sound wonderful...it would probably just sound like you had an exhaust leak!

Backpressure exists, that's why larger exhaust systems gain power....but you may have noticed that having a stock exhaust and restrictive intake gives a power band in the lower rpms...a more free flowing exhaust brings the power band higher, with losses in the lower (or midrange, depending) rpm. The reason exhausts give you more "power" is because it's peak hp, not necessary overall power. This back pressure argument is getting so old, haha...

 

Just put a stock ITR exhaust on there. It will flow better than stock non-R exhaust, but still look stock and be fairly quiet.

 

Well, there's reversion, but I think calling it backpressure is a crappy way to describe it. Right?

 

^ Yeah, I guess so : P