Sound of stock exhaust + RP supercat
#26
Doesn't seem like the packing burned out. With the stock cat pipe back in it is very subtle and much closer to stock.
Maybe it just the RP - JIC combo. Or maybe there was a leak I didn't find.
Maybe it just the RP - JIC combo. Or maybe there was a leak I didn't find.
#27
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Just added the Tanabe Hyper Medallion exhaust to my RP supercat. At idle it is louder, but not too much. Cruising it is barely noticeable. Get on the gas and it roars.
As for the RP supercat, I have a hanger welded onto mine. It was hitting the undercarriage cross bar when I went over bumps.
As for the RP supercat, I have a hanger welded onto mine. It was hitting the undercarriage cross bar when I went over bumps.
#29
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I have the rx7store HF Cat pipe 3" with the stock exhaust. It has the magnaflow cat on it which is about 7 inches only in length. Anyways, at first I hated the sound coz it sounded like a scooter. At idle, it's no different to stock. At cruising (3 - 4K RPM) or light load, it sounds strong like the RB exhaust but throatier. Anything above 5K RPM and high load is high-pitched and throaty. Yeah, kinda ricey but at low volume. It's not too loud.
#30
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Originally Posted by TeamRX8
long term that has yet to be determined, of course as heavy as most exhaust parts are being made for this car you may be right, otherwise you could end up cracking an unsupported pipe in time
#31
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Originally Posted by Chris_Bangle
P.S. RP has modified there supercat since the original design for better flow and they are currently in the process of adding hanger. So perhaps the sound will be different.
https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/new-style-bonez-rp-supercat-85729/#post1293660
#33
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it's not just ten pound pipe, without the middle hanger a large amount of the exhaust is then only hung at the exhaust manifold and rear diff hangers, which is about the wheelbase length, that's a very long length of exhaust piping for only two hangers, some people have reported the pipes hitting the chassis underbraces over bumps without the hanger, no surprise ...
#35
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I dunno about you, but even removing the stock pipe was so hard to nudge off the connections. I only took out the hanger for the stock pipe and pushed it as hard as I could to disconnect the thing. It took me many tries until I finally nudged it off to the side. I can't imagine any natural movement of the car that could cause the connections to even move a bit.
#37
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no, I had picked up a used one and then sold it, the original owner had already installed a hanger on it
I'm planning on building an entire system; emissions legal manifold with 3" outlet, full 3" midpipe with hi-flow cat, two inline Burns Stainless 3" straight-thru mufflers, and an Apexi 80mm exhaust control valve in case I get into a noise compliance situation
I'm planning on building an entire system; emissions legal manifold with 3" outlet, full 3" midpipe with hi-flow cat, two inline Burns Stainless 3" straight-thru mufflers, and an Apexi 80mm exhaust control valve in case I get into a noise compliance situation
#38
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Originally Posted by Xyntax
I dunno about you, but even removing the stock pipe was so hard to nudge off the connections. I only took out the hanger for the stock pipe and pushed it as hard as I could to disconnect the thing. It took me many tries until I finally nudged it off to the side. I can't imagine any natural movement of the car that could cause the connections to even move a bit.
I'm in the metal fab business and work extensively with stainless tubing. You'd be surpised how much the system moves just from the heat buildup during extended WOT use. I had 2" clearance from my turndown to the valance and it still managed to push out and melt a 1" deep u-shape into it. You're talking about a thin-wall tube the length of the wheel base, about 8 ft long or so with a non-rigid connector in it. Everytime you go over a bump, hit a depression, etc. that pipe is bending and flexing if even only a small amount. Add heat to the equation and it exacerbates the situation a lot; materials soften and get weaker. Which BTW T304 stainless is not a good rotary exhaust material because it weakens at high temperature. You can get around that by using thicker wall, etc.
Wll it break and when? I can't say, maybe never. I just don't see why RP would mak that compromise given the fact that it's inexpensive and the hanger attachment point is already there. I wouldn't put my name on a street production part that didn't have it in place, but that's me.
#39
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Originally Posted by TeamRX8
no, I had picked up a used one and then sold it, the original owner had already installed a hanger on it
I'm planning on building an entire system; emissions legal manifold with 3" outlet, full 3" midpipe with hi-flow cat, two inline Burns Stainless 3" straight-thru mufflers, and an Apexi 80mm exhaust control valve in case I get into a noise compliance situation
I'm planning on building an entire system; emissions legal manifold with 3" outlet, full 3" midpipe with hi-flow cat, two inline Burns Stainless 3" straight-thru mufflers, and an Apexi 80mm exhaust control valve in case I get into a noise compliance situation
![Eyetwitch](https://www.rx8club.com/images/smilies/eyetwitch.gif)
#40
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that might be true in an engine that that has port timing overlap, which the factory Renesis doesn't have. There's a new game in town.
You might want to review the TurboXS exhaust thread and the general concept has already been proven in the Astra Racing Cup cars which are dynoing 270 emission legal hp at the flywheel, mine's a bit different from theirs so we'll see ...
You might want to review the TurboXS exhaust thread and the general concept has already been proven in the Astra Racing Cup cars which are dynoing 270 emission legal hp at the flywheel, mine's a bit different from theirs so we'll see ...
#42
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Originally Posted by Rx-A-Ho
Doesn't seem like the packing burned out. With the stock cat pipe back in it is very subtle and much closer to stock.
Maybe it just the RP - JIC combo. Or maybe there was a leak I didn't find.
Maybe it just the RP - JIC combo. Or maybe there was a leak I didn't find.
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