exhaust

[Inf]

I bought a 2.5" turbo style exhaust system from MSA. I managed to fit it myself without any prior experience. I used a stock exhaust manifold. The downpipe they provided didnt come out at the right angle so I ended up having to bend it upward slightly to keep it from hanging way too low.

I have to say that I don't really like the sound. People are not kidding when they say there is bad resonance from 2000-2500. It is very annoying. I feel like a ricer if i'm cruising down the road in those revs since it sounds just like a civic with a cheap fart can. Higher RPMs have slightly better sound, but it is still a little too loud for my tastes.

At idle it sounds pretty rough and has a low rumble, although I think the roughness is due to leaking air around the throttle shaft which made calibration and tuning of the carbs pretty tough.

All in all, I think I will end up ripping this system out within a year or so in exchange for some custom bent dual system that I want to be similar to the trust system, i.e. completely seperate pipes from front to back with proper muffling to give it a more pleasing sound. It's already starting to rust anyway and I have only driven in the rain once. (this is not the aluminized version). Before it got really humid however it looked really cool for a while as the pipes turned different shades of purple as I drove it longer.

[AxtellZ]

I'm with Marty all the way on this one. My understanding is that unless the engine is fairly modified (cam, triples, etc)- the headers provide a negligible gain, and sometimes a loss of performance. And yes, unless coated- they're hot, rust, and don't seal well sometimes. I have a 260 with 2.25", a resonator under the seat, and the "turbo tip" muffler- just love the growl! It can get loud, and can resonate around 2K, but hey, that's why we drive a standard transmission, right?

[xtinc]

I'm running MSA 6-1 ceramic coated headers with 2.5" piping. I used a Dynomax bullet muffler about halfway down and a Magnaflow SS muffler at the rear. The car has a low growl from idle to about 3500 then starts to scream after that. The dynomax really helps to eliminate the resonance.

[JEFF]

"SEAT-OF-THE-PANTS" Dyno ..... The power gains from the S-O-P Dyno

is solely measured by the owner / purchaser of the components ( this case the header ). The POWER gain rises sharply on the graph in accordance

to the height of the price of said components. You get the idea ....

- Hows that grab ya by the pants ??

- Jeff

[TTDRIVER]

Would it be good to get the twice pipes mainly because of the piping and putting my own choice of muffler on it? Does that sound like a good setup? I like the fact that it has two individual pipes but dont like the idea of a glass pack. Is it possible, has anyone done this before? What are the pro's and con's to a setup like this?

Thanks

Saro Fagerian

[Tommo560]

I have a highly tuned l28 (cams, triples, the works) with a 6-1 header and i THINK a 2.25 inch exhaust. but i HATE the sound of it. i agree with who ever said it sounds like a civic, but WAY louder, and a lot rougher. so i want to get a new turbo rear muffler and a couple of hot dogs to quiten it down some and to change the noise. does anyone see any flaws on this? has anyone done it and know what it sounds like?

Cheers,

Tom.

[PrOxLaMuS©]

Well...

the Twice Pipes is a GREAT exhuast setup don't get me wrong...

it is very similar to the Trust (Greddy) setup.

The pipes are each 2" in diameter, and exits out of 2 glasspacks or resonators.

Twice Pipes on my 280Z hang rather low, and with a lowered suspension driving over speed bumps will cause some scraping.

For a 240Z however, it should fit very snug.

Only problem...

The MSA Twice Pipes setup is VERY VERY VERY loud!

My parents can hear me rev my engine at 2,500 RPM over 3 1/2 blocks away.. and in my opinion.. with a stock exhuast manifold and the Twice Pipes it sounds like I am running open headers.

At first they are a bit.. well.... weird and ricey sounding.. and it sounds like it's farting. But once the fiberglass packing inside starts to burn out.. prepare yourself. I set off car alarms EVERYDAY in my neighboorhood.. and especailly in parking garages. It's soo much fun.. but may be too damn loud for older folks (i'm 18)

You can get a different muffler... but you need a dual pipe inlet.. which I think magnaflow sells.. but you might need a resonator.. because it will resonate without the glasspacks.

Here are some picstures of my 280Z twice pipes setup and a video

My Twice Pipes thread

And a video

Right Click and Save As please

[Inf]

If this is the same trust system you are referring to, I would say there are quite a few differences

http://www.classiczcars.com/forums/showpost.php?p=76658&postcount=2

They are similar in that they both have 2 pipes sticking out the back when installed, but not much other than that.

The MSA twice pipes system always seemed to be a bit of an odd setup to me.

I don't think it would have been that much more difficult for them to manufacture it with the exits in an over-under configuration.

[TTDRIVER]

The piping looks similar and the exhaust looks like what im refering to. I hate glass packs and think with a dual outlet exhaust it might sound pretty good. Hey Proxlamus, If you take the piping to a muffler shop they might be able to bend the piping up alittle after the dif so that it can have more clearance.

Thanks

Saro Fagerian

[PrOxLaMuS©]

won't bending it shrink the diameter.. restricting air flow?? and killing power?

[e_racer1999]

^^ i believe they have mandrel benders....

[jmortensen]

I have the MSA 6-1 header (bought from AZC), and I can honestly say I hate it with a passion. My bitch may not even be an issue at all for round port headers, but the way they crimped the tubes on the square port is just horrible. The middle 2 runners are seriously blocked by the tubes where they are crimped. It was bad enough that I "ported" the header to fix some of it.

Also I had to weld additional metal on the flange in order to get it to seal to the head because the flange didn't cover #6 exhaust port all the way. The original installation was when I learned that those white paper header gaskets SUCK. Use a Nissan manifold gasket. Even with all the time I spent trying fixing mine, I still have to run a bead of copper silicone on both sides of the gasket around the exhaust ports or it leaks.

I haven't seen the 3-2-1 header up close in a long time, but it looked pretty crappy as well from what I remember. Next time I'm going Nissan Comp, or maybe some one off custom. I think Stahl does a header for Z's...

Sorry to be so negative but I felt seriously burned when I bought that thing.