What's the deal with angled mufflers coming out the backs of many cars? Is there some advantage to this design? It looks kinda strange to me. I notice a bunch of Honda's this way.

My LEAST favorite I saw was two angled mufflers coming out the back of a V6 Accord.

Is there some kind of bling factor I'm not getting?

 

IMHO its more of a JDM fad if anything. But some will argue that the the purpose of the angle is to create less gas flow restriction. If you look underneath an evo for example, the axle back portion of the exhaust has an almost 90degree bend. And if you look at an hks designed exhaust for the evo , the axle back portion has less of an angle but of will turn toward the right......"the jdm angle?"

 

I think this has been answered before but here we go again.

The purpose of having an angled exhaust is that it can remove one bend (therefore leaving the exhaust angled instead of sitting straight) and allow for exhaust gasses to flow more freely. Of course, free flow helps with power gains; that's the point of any exhaust-side mod (new header/turbo manifold, turboback/catback/axleback exhaust, etc.).

 

ghost is right...of course this did become a big JDM fad especially since the drifters started sporting their exhausts like this.


The next big thing to come out is the angle tip exhaust inspired by many JGTC cars.

 

I thought about putting mine like that, but it wouldn't fit. I think it looks alright

 

Unless your angled exhuast is angled to reduce or eliminate another bend in order to increase performance, it's dumb as sh*t.

 

im going angled when i get mine, just because its what i wanna do to my car, lol.

 

I guess to each his own...

 

there's also a theory posited (oh, good word ) that having the exhaust angled into the slipstream that the car makes actually decreases the drag. The theory is that the sound energy of the exhaust note disrupts the airflow as air passes around the back of the bumper. Angling the muffler into the slipstream is supposed to allow the energy of the exhaust note to follow the stream, thereby not adding any drag on the rear, "sucking" the exhaust out of the muffler and not making the engine work any harder than it has to.

I'll let motoman do my drawing for me
http://mototuneusa.com/harley_power_!.htm <---- cut and paste into browser

 

Why havent you gotten the EVOM Guru title yet?

 

Just so you know, motoman has been proven to be a complete idiot time and time again. Just take a look at his "Break in Secrets". What a moron...

 

ehh what? who is motoman and whats that got to do with anything in this thread

 

i really dont think that the exhaust gas will effect drag enough to make a diff. with angled tips, (not angled exhaust) u are adding antoher bend and making it harder for the gas to get out. if the tip is just angled, i think even if it does help reduce drag, the extra bend (while small) will offset it even more.

either way, its so minor its not worth arguing about =)

 

it's alright for you to have your opinion of motoman and his hard engine break in. There's another thread (I'll post the link to it when I get a chance to find it) in which one evo tuner on these forums broke his engine in hard (like motoman recommends) and another followed the manufaturers break in as well as can be expected. Both appear to be qualified tuners, and both have performed compression tests on thier evos at about 20K miles. We'll be keeping an eye on both cars for problems down the raod, as well as compression checks at regular intervals. FWIW, the hard break in is producing 200 PSI readings, whereas earlier compression tests of "regular" break in engines are producing compression in the 180's range.

I sincerely hope you're calling motoman a moron, and not me. I'll give you the benefit of the doubt.

EDIT: On my way in to work today I noticed that almost all of the newer sport bikes that passed by had exhausts that pointed into the draft cone.... but that must just be some kind of coincidence, right? It wouldn't be an engineering improvement, would it?

 

engineerboy was talking about angled exhausts not the tip. the angled tip is to just to keep the bumpers from burning especially on JGTC cars where they are running a straight pipe and spit hellish flames every down shift.