that is roughly all that is available from a cat-back system on the RX8.

The exhaust system from the cat back is not terribly constrictive in stock form. The reasons for buying a cat back system for street use for the RX8 become more about sound and looks that actual HP increase.

 

anyone exhaust tips changing color mines are turning gold .

 

smrx8, What kind of exhaust do you have?

 

Nevermind smrx8, I read your other post in which you said you have the RB. So, how long have you had your exhaust for? I'm going to clean the soot from my tips and check it out now.

 

i have the racing beat exhaust for about 3 weeks on

 

Thanks for the vids. It sounds awesome!

 

RB got people to wait through all the delays and sound w/o sound clips or dynos sheets purely on reputation.

It works for you too... for those of us coming from American muscle. We know the Borla name and quality.

As some people have noted... I think the bend has been a bit of an issue for some people. It's come up several times in different threads. According to yours and even RB's dynos it makes no difference perfomance-wise...

Who makes RB? As I mentioned to you in another thread... they designed it themselves (according to their site). From what I've read here, they outsource the component parts of it and just assemble it themselves.

What can you do to improve your product? Well everyone loves the sound of your cat-back. No problems there. Weight? You're a lot lighter than stock and it seems maybe RB too. Looks... most like it a lot. I did too... yes did (past tense). The look of the RB tips and Magnaflow SS system tips... I like 'em a lot. Maybe upgrade the size of yours to 4"? Really a better suggestion I have is this... make 2 lines of cat-backs. What you have now... economical and makes it's power... and a new line.

As for the new line... catch the thread "A challenge for cat-back exhaust makers..." A short run down... after doing some more thinking about the LEG Motorsports "Sequential Muffler System" and the Odula cat-back... I'm convinced that there is some power to be gained in the low- mid rpm range. The inadverdent torque increase magazine reviewers felt at 3,000- 4,000 rpm in the LEg system, I believe to be caused by the pressure building to just the right level before it is able to open the actuator at 4,000rpm. Odula's system uses some smal diameter pipes and lots of curves... more pressure? slower exhaust? They say more torque from about 2,000 -7,000 rpm. Putting out something that can do this.. give a bit more low-mid grunt AND do what you do in the higher rpm already...That will get people's attention. It'll cost more than what you have out now, but if reasonably priced... you might just have a winner.

 

and then throw in the mix of a FI application and you're at a whole new ball park..all the bends will kill a FI application. Turbo's like free flowing exhaust...to much back pressure will kill the system...the whole point is to force it in not have to force it out...the less bends in the mix the more FI application wanting folks will buy..

I think the best system would be a single outlet with no or minimal bends...of course this will be loud...disrupt the aesthetics of the car and (being nice) GAUDY...but to get the most bang for the buck on a FI application i have seen more positive results with single outlet, minimal-no bend exhaust systems...of course I have never tuned rotaries before...i come from a Honda, Nissan, Mitsub, and Toyota shop background..so this may hold false for Rotaries..

I think instead of trying to perfect what Mazda applied to the N/A motor manufacturers should be thinking ahead because you know darn well FI is right around the corner...

 

And that is being narrow-minded XeRo. Putting FI on a 8 is an automatic "game over"... your engine warranty is now voided. Even if a kti comes out from Mazda it is very possible that they still say you void your warranty (another board member said that DC did it with the SRT-4). Beyond that, not everyone will want to spend $4000 for a kit and another $1,000-2,000 for install and tuning of a S/C or T/C. So it is hardly a waste to build parts that perfect N/A performance of the 8. We also have no guarantees that the next 7 will have FI either. At the moment the Z and S2k are N/A. THe next Supra looks to be N/A too. ONly the Skyline may have FI and how much will that car cost??

Manufacturers have to think about the majority of people, not just the enthusiasts. The majority of people are not going to add FI to their N/A car (look at the Miata).

 

I think either you took what I said the wrong way or I misrepresented what I was trying to convey...

I wasn't being narrow minded...i mean I totally understand the actual enthusiast is more of a minority, what I meant was...

Not only is it nice to try and improve on the current state of the car, being N/A and trying to squeeze every bit of potential out of it, but it would be nice if the future would be included in the design so that us few that will be going FI can have one less worry of replacing a part we already replaced...is that better?...

 

Oooh. I see. We got our wires crossed.

Yeah... I'd like to see both. I prefer to see everyone happy than just one group or another. I dunno how well one could make an exhaust system that is good for FI and N/A (reconfigurable?), but what you speak is the truth...

 

Just got on the waiting list at RX8 Store for this bad boy. Hopefully I can get it installed before the big Rocky Mountain club meet in Denver June 5th.

 

Any more word on the difference in weight between RB and stock?

 

RB = 39lbs? Well here's the JDM roundup from RX-8 Sports Magazine...

Fujitsubo LegalisR = 39.24lbs
Ganador Vertex Titanium= 18.96lbs
HKS Legamax= 44.31lbs
Trust/GReddy MX Muffler= 35.05lbs
Auto Exe Stainless Muffler= 40.12lbs
FEED SONIC AS Stainless Muffler= 40.79lbs
RMagic Sound Tune muffler= 36.60lbs
RE Amemiya Dolphin Tail Muffler= 39.90lbs
Knight Sports SE763 Legal Muffler= 39.02lbs
Pan Speed Original Muffler= 37.91lbs
San Ai Works Original Stainless Muffler= 40.78lbs
Revolution Exhaust System= 35.27lbs
JIC Bullet Spartan DE= 39.24lbs

 

The weight of the RB system looks about average to me aside from the Ganador system. Even then there isn't enough of a weight difference to make a difference acceleration wise. With so close of a weight difference between all of the systems, no one should base their buying decision on which one weighs how much. In fact the true power gains from all of the systems are going to be so close that the only 2 relevant buying decisions should be on sound/noise and price. Everything else is too close to call.

 

I agree completely. when I heard RB was heavy, I was worried at first, but as I posted the figures and saw it all together... I came to the same conclusion. Get what looks and sounds good to you.... the rest is all equal... more or lesss.

 

hitmann just got hiS!!!! i havent installed it ill post a pic and video once installed hoping to get a deep noise not ricey like the b&b

 

Actually... does the RB muffler give an almost Italian sports car sound... like an Alfa Romeo? B&B? Just curious...

 

Good news, we are still on schedule for an early June delivery date of the next batch of RX-8 exhaust systems.

As with most new exhaust applications, we start production slowly in order to sort out any fitment issues. The last thing we want is a large number of exhaust systems on the shelf that require reworking!!!! The demand for the RX-8 exhaust was larger than we initially expected, which caused a bit more of a backorder than we normally have had in the past. Oh well, what can we say..... you guys are just a bunch of die-hard fanatics!

For those of you that already have our exhaust, try this. With the car in third gear, and keeping the RPMs high, run the car through a tunnel or freeway underpass with your windows down!!! Let us know what you think the exhaust sounds like.

Jim L.

 

June? Pout, whine. I would like one by next Monday, for a Memorial Day race.

I just called & put my name on the wait list of 40-some other people in front of me. Oh well, I should've been doing some mindreading and fortune telling, and put one on order when I bought the car.

 

i dont think ppl around me will like that!

 

I fully plan on doing this in my work parking garage

 

coughyourfiredcough!

lol

 

coughyourfiredcough!

lol

 

coughyourfiredcough!

lol