05-02-2019, 09:22 PM | #89 |
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Well I opted out of a fabspeed pipe after reading some of the horror stories about fitment and customer service. The thing I don't like about Remus is that it's just straight pipes no x or h or y transition. Guess it's gonna be active.
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05-03-2019, 03:41 AM | #90 | |
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The value in modifying a stock exhaust if you can tig weld (I can) is that it remains looking stock, fits the same sounds better and makes power. Unless that was achieved with any other vehicle for example HSV Commodore owners, an exhaust that sounds lousy and makes no power is unsaleable. I can't believe people by this junk for their M3/M4's and pay insane prices to make their car sound like an old 2 stroke motocross bike is the reality of it. |
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05-03-2019, 05:06 AM | #93 |
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05-03-2019, 05:08 AM | #94 |
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05-03-2019, 05:11 AM | #95 |
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http://www.millteksport.com/stockist...ntry=Australia
Looks like lots or authorised dealers, the ones I refer to on eBay are apparently in Melbourne via that sparesbox. |
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05-03-2019, 09:25 AM | #96 |
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Here's a clip of the Milltek with secondary cat delete.
They've stepped the pipe size up from the secondary cats to 2.75" and is stepped up at the wrong end of the system. When the turbo pipes and front section is 2.5", stepping the size up after that's a waste of time. It's like putting 6 foot of 1" hose on the end of your 1/2" garden hose and thinking it'll flow more water. They potentially have a good design then do something stupid increasing the pipe diameter and adding weight to the exhaust for no gain. Last edited by RevNev; 05-03-2019 at 09:35 AM.. |
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05-03-2019, 03:24 PM | #97 |
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If you're going catless, then you're going to run a tune to get rid of CEL - then the tune will give you ~100hp. Run BM3 and you can fiddle with the pops/bangs all you like -turn off cold start while you're there.
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05-03-2019, 04:06 PM | #98 |
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It will also give you a spun crank hub. Fun times !
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05-03-2019, 04:30 PM | #99 |
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Secondary cat delete doesn't throw a CEL. Some OBD exhaust valve controllers stop the CEL with a primary cat delete (catless downpipes) without touching the tune is another way.
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05-03-2019, 04:43 PM | #100 |
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There's not much consistency with spun crank hubs. Some radically modified and tuned engines haven't spun the hub and some said stock engines have spun. I think a CS or perhaps a GTS factory tune with better fuel is enough without compromising reliability unnecessarily.
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05-03-2019, 04:45 PM | #101 | |
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Yeah there is the occasional stock car. But almost exclusively these cars are tuned. Largely these are tuned cars and I wouldn't be surprised if tune quality was directly proportional to the chance of spinning. |
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05-03-2019, 04:48 PM | #102 | |
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05-03-2019, 05:33 PM | #103 | |
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There's 25 to 30kw in a catless exhaust and that's a decent increase within the capabilities of a factory tune, but they're mega loud with no cats and to tone it down the exhaust must be re-worked to add resonators into the system. Last edited by RevNev; 05-03-2019 at 05:39 PM.. |
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05-03-2019, 11:20 PM | #104 |
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05-04-2019, 04:07 AM | #105 | ||
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I don't agree with you in saying the MPE is a lousy note. That's quite subjective! I, in fact love the sound of my MPE, and that's what sold me on it when I test drove comp v mpe at the dealership. But, I do agree in 'room for improvement' that's why I'm hoping to delete secondary cats and add a resonator and x/merge pipe at that said location. Otherwise I LOVE my MPE, and am more then happy with my purchase decision. |
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05-04-2019, 04:41 AM | #106 | |
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As I've mentioned previously, the MPE has the resonator deleted meaning when the valves are open, there's no muffler in the system between the secondary cats and the tailpipes and that alone makes it louder. If you cut the resonator out of the stock system to replicate the MPE, it'd likely sound much the same at full throttle when the muffler is bypassed with open valves. Having said that, the note potential's in the midpipe and the MPE will likewise sound good at revs with open valves and reworked midpipe. The MPE or any other rear muffler isn't a necessary purchase to make power and sound good at full song with a valved exhaust system. There's 30kw of engine power lost in the cats and if you decat them with an MPE, you have no mufflers at all with the valves open and they're crazy loud and absolute cop bait if you stand on it in fact, it's unusable on the street like this. Consequently, it's a necessity to rework the midpipe if you want to reach the engine's power potential without over stressing the engine with high boost tune ups. Last edited by RevNev; 05-04-2019 at 04:53 AM.. |
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05-04-2019, 05:03 AM | #107 |
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Ideally deleting secondary cats and adding x pipe (see pic) In exact location would be my next step..
The only concern I have with these x pipes is the internal decrease in diameter...?? Will this hinder performance RevNev? Or would a H pipe be better??? Thoughts ?? |
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05-04-2019, 05:12 AM | #108 |
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Im still waiting for my custom exhaust fabricator to come back from Europe so he can start on a custom midpipe for my MPE that deletes the secondary cats into a single midpipe essentially creating a "ghetto" version of the AA midpipe. All the video clips of the MPE with AA midpipe and catless downpipes sounds epic and almost exotic sounding.
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05-04-2019, 11:18 AM | #109 | |
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X-Pipes work on V8's with a scavenging effect from one bank to the other but V6 and inline 6 engines have alternate exhaust pulses from each bank or from each turbo in the M3/M4 unlike a V8 and an X-Pipe serves no purpose other than smoothening the exhaust note. Balance pipes or H-pipes don't join the pipes together for a long enough distance to fully blend the pulses together and only takes the farty edge off it. The stock resonator has an H-Pipe inside like the MPE H-pipe you can see externally but takes up space in the resonator reducing the muffling capacity. |
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05-04-2019, 05:48 PM | #110 | ||
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