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So I finally got an exhaust for my car my buddy gave me his AutoExe exhaust to use on my car. Can't wait to get it fixed. Had enough of the stock sound. However, I was doing some reading about this exhaust and I came across this. http://www.rx8clubsingapore.com/viewtopic.php?t=277
It says something about a "power chamber". Now, this exhaust doesn't have that. It's just a straight pipe leading from the end of the cat to the exhaust. My car's stock exhaust has this "power chamber" though. A small barrel right behind the cat.
So I finally got an exhaust for my car my buddy gave me his AutoExe exhaust to use on my car. Can't wait to get it fixed. Had enough of the stock sound. However, I was doing some reading about this exhaust and I came across this. RX8 Club Singapore ? View topic - REVIEW: Autoexec Titanium Exhaust
It says something about a "power chamber". Now, this exhaust doesn't have that. It's just a straight pipe leading from the end of the cat to the exhaust. My car's stock exhaust has this "power chamber" though. A small barrel right behind the cat.
What the heck is it? They say it increases power
I don't think there is anything that increases "powaaa" by having a chamber. Better flow=most effective power gains. Maybe you are thinking of the resonator
The thing by my hand is the resonator. Is that what you are reffering to?
The resonator is implemented to reduce the sound of the car without restricting any flow.
I don't think there is anything that increases "powaaa" by having a chamber. Better flow=most effective power gains. Maybe you are thinking of the resonator
The thing by my hand is the resonator. Is that what you are reffering to?
Yes that's it! That's right behind the CAT yeah? Did you check the link I posted? The guy has highlighted this so called "power chamber".
Yea. I would say that guy is full of something brown. I did check the link. On the stock cat, you have a packing closers to the cat back. That is to help with better emissions. Then closers to the front end, I believe(don't quote me) that would be the resonator.
Speaking of resonators;
can anyone tell me if the RB Power Pulse pre-silencer is truly straight-through design (i.e. no baffles)? Universal Presilencer , 2.5-inch ID for RX8 - Racing Beat
It sure looks like a 'glasspack.' What is it filled with? how does it 'presilence'?
I am wondering if an exhaust system composed of header -> 2 presilence in series ->split to 2 presilencers (one for each stock exhaust tip location) would 'silence' enough.
Speaking of resonators;
can anyone tell me if the RB Power Pulse pre-silencer is truly straight-through design (i.e. no baffles)? Universal Presilencer , 2.5-inch ID for RX8 - Racing Beat
It sure looks like a 'glasspack.' What is it filled with? how does it 'presilence'?
I am wondering if an exhaust system composed of header -> 2 presilence in series ->split to 2 presilencers (one for each stock exhaust tip location) would 'silence' enough.
Yea. I would say that guy is full of something brown. I did check the link. On the stock cat, you have a packing closers to the cat back. That is to help with better emissions. Then closers to the front end, I believe(don't quote me) that would be the resonator.
I thought the resonator is behind the cat. I think it's clear now that this "power chamber" this guy is talking about is the resonator. That guy is saying that, from what I can understand, having a bit of back pressure is good... But in general, having a straight pipe instead of the resonator will give me more power, right? My AutoExe exhaust came with a straight pipe. It didn't come with a resonator
Hello all, my rx-8 has been making a rubbing sound when I make left turns. Very loud when its a slow left turn. Its in the rear right side. My mechanic cannot find any play in the wheels. I am having someone else check it out this weekend. I am having the shocks, struts, barrings and bushings inspected. Anyone here know what it could be? Also can one change the order the lights turn on? Not sure if my lights were modified but the halos in the front go on second, can they be made to go on first, versus the inner lights which are yellow?
Hello all, my rx-8 has been making a rubbing sound when I make left turns. Very loud when its a slow left turn. Its in the rear right side. My mechanic cannot find any play in the wheels. I am having someone else check it out this weekend. I am having the shocks, struts, barrings and bushings inspected. Anyone here know what it could be? Also can one change the order the lights turn on? Not sure if my lights were modified but the halos in the front go on second, can they be made to go on first, versus the inner lights which are yellow?
Thanks.
Is the car shuddering while making those slow turns? If that's the case, change the differential fluid. That should fix it.
I thought the resonator is behind the cat. I think it's clear now that this "power chamber" this guy is talking about is the resonator. That guy is saying that, from what I can understand, having a bit of back pressure is good... But in general, having a straight pipe instead of the resonator will give me more power, right? My AutoExe exhaust came with a straight pipe. It didn't come with a resonator
Now a resonator doesn't restrict flow, it is a insulation from my understanding, if you look down the midpipe with a resonator, BHR for example(what I own) then you will see that there is no packing just a clear hole. The resonator is there to stop sound without restricting flow. A straight pipe, will be much older because the exhaust is flowing at its best. Less bends=more flow. My understanding of it.
Link I found, I am not sure how well that would work. Are you trying to completely silence the exhaust sound?
I want to get it pretty quiet, not much louder than stock.
As straight-through as possible, as light as possible.
Cost is not too much of a consideration.
From reading and looking around, I doubt that stacking up pre-silencers will work well. I should probably just knuckle under and get the full RB system, seems to be the best.
I thought the resonator is behind the cat. I think it's clear now that this "power chamber" this guy is talking about is the resonator. That guy is saying that, from what I can understand, having a bit of back pressure is good... But in general, having a straight pipe instead of the resonator will give me more power, right? My AutoExe exhaust came with a straight pipe. It didn't come with a resonator
That is, in fact, a resonator. There is no such thing as a "power chamber". Back pressure is not desirable for a rotary. The amount of flow through a resonator depends on its design, and the OEM resonator is a good design. If you see any power gain at all by omitting the resonator, it will be so minimal, you will never feel it--something less than 1hp at 7,500rpm. You gain a few more HP by removing the cat, but the stench is legendary.
That is, in fact, a resonator. There is no such thing as a "power chamber". Back pressure is not desirable for a rotary. The amount of flow through a resonator depends on its design, and the OEM resonator is a good design. If you see any power gain at all by omitting the resonator, it will be so minimal, you will never feel it--something less than 1hp at 7,500rpm. You gain a few more HP by removing the cat, but the stench is legendary.
(bold added)
Are people really bothered by the smell?
It is definitely noticeable when warming up and if you're at a traffic light for a while, but even then it's only a little bit stronger then a 2-cycle string trimmer(Weed Wacker).
EDIT: Also the resonators are made to get rid of specific sounds(frequencies) by resonating and "cancelling out" sounds waves.
Last edited by Love_Hounds; Aug 31, 2016 at 08:19 AM.
I have the BHR midpipe, no cat. Yes,any one behind my car will smell the lovely aroma I leave. It is strong and very noticeable if you are backing your car up.
I want to get it pretty quiet, not much louder than stock.
As straight-through as possible, as light as possible.
Cost is not too much of a consideration.
From reading and looking around, I doubt that stacking up pre-silencers will work well. I should probably just knuckle under and get the full RB system, seems to be the best.
I would say the RB is probably a great option then.
That is, in fact, a resonator. There is no such thing as a "power chamber". Back pressure is not desirable for a rotary. The amount of flow through a resonator depends on its design, and the OEM resonator is a good design. If you see any power gain at all by omitting the resonator, it will be so minimal, you will never feel it--something less than 1hp at 7,500rpm. You gain a few more HP by removing the cat, but the stench is legendary.
Great, so that guy on the Singapore forum doesn't know anything
I fixed the exhaust today and, while the stock exhaust was off, we started the car without the exhaust just for kicks. It still had the cat and the resonator on and it sounded really good! Wasn't obnoxiously loud, but a lot louder than the AutoExe. I did a quick search on straight pipes and some say the reduced back pressure would make you lose power at low rpm there's even a guy on here who fixed straight pipes, and then the car went into limp mode what gives?
What gives with the door locks? I only have my card key now and when i press the button it sounds like the car wants to lock but doesn't like you can hear under the glove box makes A clinking noise and the button on the doors neither of them work but again hear the clinking i heard theres like 3 antenas one for each door and one for trunk if one doesnt work they all dont work is this true?
Okay...here goes. I just got a CEL this morning and took it to AutoZone - they said "gas cap" so I breathed a sigh of relief and bought one from them. I asked about the tether and they gave me a non-answer but it was over my lunch hour and only $10 so I took it.
Now after looking at how the tether attaches it doesn't seem like it'll just pull out and I don't want to just cut it and leave it. I think I'll actually go ahead and get an OEM replacement for just $15 that includes a tether - but how do I get the old one off and the new one on?
my buddy gave me his AutoExe exhaust to use on my car. Can't wait to get it fixed. Had enough of the stock sound. However, I was doing some reading about this exhaust and I came across this. 
But in general, having a straight pipe instead of the resonator will give me more power, right? My AutoExe exhaust came with a straight pipe. It didn't come with a resonator 
what gives?
