ok, im interested in getting exhaust...and i know there are none available pretty much right now....what my questions are, is there going to be exhaust by anyone coming out reasonably soon? and secondly....what does anyone think of custom exhaust...for example buying N1 tips and getting your own piping ran?(3 1/2" maybe)...these are all just random thoughts at 3 13am!

andrew

 

you can get exhaust now but its like a grand. Try corksport.com or rotartyextreme.com or mazdatrix.com

 

The big names in exhaust are working on it - don't jump in too soon for the first one you meet....

Mr. Borla himself posted that he would soon have one ready, (and was spanked for 'advertising!')
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doc

 

Racing Beat has several protype exhausts running around L.A.
One was installed on the Mazdatrix car at the BBQ last weekend
ans also seen at the 2nd Tustin Meet. Also heard that Magnaflow
will have one out soon.

 

what about the custom way? buying tips and then getting piping ran? or is that not a good idea??


andrew

 

Not really, because the shop will need to choose/fab an apropriate muffler, choose pipe diameters, etc. Do you want to loan them your car for a few weeks while they trial and error some different designs (and dyno them)? Or would you rather have them guesstimate the variables, slap it on, and hope for a gain? I'll wait a while, until some tested and true units become available.

 

...what about that third option of telling them how you want it??

 

So between Auto Exe and Mazdaspeeds exhaust, which one yields the best hp gains? I can't seem to find that info anywhere. Also which one would sound the closest to stock?

 

From my understanding the Mazdaspeed exhaust has NO HP GAIN -- only a "more pleasing exhaust note" -- meaning it makes it sound meaner but not go faster.

 

Try Scott (in the service dept.) at Thousand Oaks Mazda/Subaru . 805-371-5555.

He has extensive info regarding all the available aftermarket upgrades for the RX8. Including all the available exhaust upgrades.

 

What does this Mazdaspeed exhaust cost?

 

the mazdaspeed kit is like 1000 bucks, which is way too much if you ask me, especially if there are no hp or torque gains, anyone that spends that much for the "sound" of the exhaust is just stupid if you ask me

 

The stock exhaust is quite restrictive and there are about 8-10hp to be gained from an aftermarket exhaust.

You can easily find a 100% T-304 stainless steel, mandrel bent, straight through exhaust that will provide a 10hp gain over stock for around $550.

Try Scott (in the service dept.) at Thousand Oaks Mazda/Subaru . 805-371-5555. He has extensive info regarding all the available aftermarket upgrades for the RX8. Including all the available exhaust upgrades.

I'll be shocked if anyone buys a $1000 exhaust system that doesn't provide any performance gains. What's up with that?

 

magnaflow blows, borla is american, its all about Re Amemiya guys! Proven 12.25 bhp gain on the dyno.

 

That's interesting...I thought I had read that the stock exhaust on the 8 actually was not all that restrictive, as less muffling was needed for the Renesis than for previous iterations of the rotary. It also doesn't really make sense to me that Mazdaspeed would come out with an expensive exhaust that had no performance gains. Mazdaspeed stuff is not usually like that...certainly, if it were relatively easy to get horsepower this way it doesn't seem logical that Mazdaspeed would have missed that.

I wonder, if you are able to come up with an exhaust that gives 10 hp better peak power, what it does to the torque curve? I would think very few people would be interested in 8-10 additional peak horsepower if that meant narrowing the useful part of the torque curve and moving it higher in the revs.

jds

 

true that...

 

hehe has anyone taken their exhaust off? with the whole thing or just the rear section? i was just wondering....


andrew

 

I'm surprised nobody has tried a straight thru single pipe design ala Porsche. When I saw my RX-8 up on the lift a week or so back, the exhaust tubing looked like a real good diameter, but the dual exhaust design looked like it did nothing for the performance of it. Lots of sharp bends and needless length for the sake of a dual exhaust. The centered single exhaust seems possible if you change out that real bumper cover. Now THAT would be cool (and probably some serious HP gains to boot).

 

I'd love to get the HP gains, but I prefer the classy/sleeper exhaust notes. Is it possible to get good HP gains without that "pissed off bumblebee" (can't remember who said that) sounding muffler?

 

I'm surprised no one has mentioned getting rid of 1 or 2 of the THREE cat's on the car...

 

I'm seriously considering fab'ing up something like that to use at the SCCA Solo II Nationals next month. Noise is far less of an issue than HP in that environment.

 

three cats?? where?? diagram please. (i've only seen one...)

 

I'm looking now, I've seen sideview pictures that indicate there are 3 cats on the car, but now I can't find them.

 

Is increased noise a necessary consequence of higher performance exhausts? Are there HP gaining exhaust systems without noticable increased sound?

 

OK, I know next to nothing about cars, but I've seen several threads talking about how replacing the exhaust could free up around 10 hp. For $500-600, that sounds like a good deal. Especially since Mazda just game me $500 for taking it away .

Is there any risk in doing this? What are the downsides besides having a louder car? I live in Minnesota so I don't think I have to worry about any emission problems. Is there anyway this could actually hurt the car or make it less reliable?

Changing exhaust sounds a lot safer and more legal than flashing an ECU.

Thanks in advance for any info.