radiod;1648016 said:
Oh but theyre out there. I know i saw one on youtube 7MGE i think. 4 Inline to 6 Inline. Whats missing? 2 cylinders lol
Exhaust system Thread.
- Thread starter D.J.T.
- Start date
Oh but theyre out there. I know i saw one on youtube 7MGE i think. 4 Inline to 6 Inline. Whats missing? 2 cylinders lol
go 3 inch all the way, you're turbo so it won't be stupidly loud, and you'll gain nothing but performance..
RazoE;1648121 said:
Seconded. You'll have to go 3.5 or 4" when you're pushing more lbs/min of air than the 3" can take...which will be right around 450-500hp, and after a bigger turbo and equal length manifold. Probably right about the same time.
Remember, a motor is a glorified air pump. We make power by making it flow more air and providing the fuel to make it combust correctly at that airflow...and with a turbo, there's a bit of extra consideration for the expansion of exhaust gases at the turbine side, as that's the only way to spin it and compress the intake side. Opening up to a 4" without the supporting bigger intake and manifold would just cause the opposite of surge, and the compressor won't spool up as fast or make boost efficiently.
Bottom line...3", until you're ready to make bunches of power. Get a high-flow cat...magnaflow 3 or 3.5" works wonders and isn't restrictive in the slightest. Between that and a decent sounding muffler, it'll provide the necessary backpressure, more than likely.
(As an aside...a friend of mine was making 356 rwhp with the 3" magnaflow in a turbo rx7. Switched to a test pipe, and made 360. Near enough not to matter.)
Bleakvoid;1648132 said:
Wow thank you so much. & a 3" Magnaflow cat is EXACTLY what i have. so im going 3" to the muffler & sometime later i will get a turbo kit from driftmotion & go bigger. But thats when i know more. Don't want to be another of those Youngsters that fail. Thank you all for helping me & how to do you add tags? i try but it says something about length.
bioskyline;1648171 said:
Hey i installed stock elbow, megan downpipe, 3" magnaflow cat, 3" pipe bent to a 3" inlet/4" outlet 14806 Magnaflow muffler. Sounds real close to & RICE & no joke from withing the car it sounds like azz.... i prefered the sound of NO MUFFLER & only the downpipe :bigthumb: I was wondering if a Resonator will help???
You should ditch the the stock elbow and megan down pipe. Restriction right there. If its loud and droning a resonator would help.
hvyman;1653319 said:
WEll i was looking for a cheap solution at the moment & i got the downpipe. I will do a different downpipe in the future for sure. & would a 16" or 18" long resonator do?
hvyman;1653319 said:
+1 Yeah, you should ditch that stock elbow and Megan DP, maybe resell them on here. If you're just looking for something to hold you over until you upgrade to one of the DM kits you should go w/ the DM downpipe/elbow that Aaron sells for $200. I think you'd be happy with it until you have more funds to play with.
Heres how the new exhaust on my car looks.... Wish i had a camera or something to record video. all i have is phone so i dont even try since im going to get much b.s. of quality & idk if the sound will get the sound problem through.
SupraMedical68;1653599 said:
Like ass, especially from within. I need a resonator bad. Fart can sound mixed with something else??
It's probably the stock elbow doing it; in your sytem, exhaust gasses are expanding in two places now...once at the turbine (manifold -> 2.25) and again inside the downpipe (2.25 -> 3). Close proximity of the two is going to cause a sonic issue called a harmonic, where two sound waves of different frequencies combine, and where they both peak and trough at the same time, will cause the frequency of that condition (it will sound like a low octave of the exhaust note) to be pretty loud, causing your drone, not to mention turbulence from the second expansion.
The resonator will be a bandaid for now...any increase in boost pressure and even different flow levels in the exhaust will change the frequency of that harmonic, and possibly put it outside the range of what the resonator can eliminate. Going to a 3" elbow and downpipe (better: both in one) will fix it, as you're moving all of the gaseous expansion to the turbine; it'll also spool the turbo faster, as the gasses will escape the exhaust side of the turbo much faster.
The resonator will be a bandaid for now...any increase in boost pressure and even different flow levels in the exhaust will change the frequency of that harmonic, and possibly put it outside the range of what the resonator can eliminate. Going to a 3" elbow and downpipe (better: both in one) will fix it, as you're moving all of the gaseous expansion to the turbine; it'll also spool the turbo faster, as the gasses will escape the exhaust side of the turbo much faster.
Bleakvoid;1648132 said:
Baloney. The easier it is for the heat to escape the exhaust manifold, the faster the turbine will come up to speed. The only down side on a turbo car is the noise. Those that run bad run bad because something else is wrong.
Completely unneeded and a possible emission failure down the line. Read the threads here if you don't believe it.
Which is a good reason not to bother with changing his stock cat at all. Unless he has a car that is really only track duty. The Toyota cat "costs" almost nothing in power. Not to make your post look really bad, but only picking out those couple of things probably looks that way.
Cheap muffler will give you that sound. PUt a flow master or magna flow resonator on and it will help. Got a apexi noir muffler for cheap if you want it.
hvyman;1653858 said:
Its a 14806 Magnaflow muffler... 3" Inlet/4" Outlet guess thats the reason. & you have any pictures of the Apexi? Idk what to do 1st, try the resonator or get another muffler... cuz MAN!!!! ITs EMBARRASSING!!! I need tinted windows now more than ever :: facepalm ::
super.secret.supra.club;1653879 said:
Thats cuz IT IS a piece of.... But thank you for the comment anyway. Im definitely changing it. probably in March cuz im tired of wasting money on exhaust, Just going to tint my windows to hide in the mean time... Any Muffler Suggestions???
Mangaflows tend to break in, but personally I haven't seen a single muffler exhaust that didn't drone. Resonator makes a lot of difference.