1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

I hate my custom exhaust.

Posted by Gee-Es-Tee, Dec 11, 2007

Please Support Kiggly Racing
Please Support ExtremePSI
  1. dsm-onster

    dsm-onster DSM Wiseman

    8,218
    92
    Joined Jul 11, 2004
    Bloxom, Virginia
    3 inch can certainly net more power than 2.5" w/ a 14b. Especially when a 14b is pushed. But, yes, the sound can be much more "controllable" w/ smaller diameter pipe.
     

    2K  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  2. 1glaserturbo

    1glaserturbo Proven Member

    302
    2
    Joined Feb 12, 2005
    Creve Coeur, Missouri
    I love my magnaflow muffler! Oval style, 3" in, 3.5" out...deep and throaty at idle and rather quiet but super deep and loud at WOT (26psi, yum)
     

    294  0

    1991 Mitsubishi Galant VR-4
    manual · Galant VR-4
    Loading...
  3. 98gsspy

    98gsspy Proven Member

    259
    1
    Joined Feb 27, 2006
    Raleigh, North Carolina
    how much power can a 14b make?
     

    381  0


    manual · 2G DSM
    Loading...
  4. cruisintalonawd

    cruisintalonawd Proven Member

    1,006
    2
    Joined Oct 18, 2007
    Casper, Wyoming
    i know it maxes out at like 20 or 22 psi
     

    387  0

    1992 Plymouth Laser RS Turbo AWD
    · 1G DSM
    Loading...
  5. mavisky

    mavisky DSM Wiseman

    4,030
    22
    Joined Sep 13, 2002
    Atlanta, Georgia
    The 14b would usually max out right around or over 300hp to the wheels for the average user. Anything more than that is going to take a lot of mods and suddenly the 14b becomes the major bottleneck.
     
  6. ilikespeeding

    ilikespeeding Proven Member

    620
    4
    Joined Nov 13, 2005
    Greenville, North Carolina
    Im running 27 psi on my 14b.
     

    387  0

    1995 Eagle Talon TSi
    manual · 2G DSM
    Loading...
  7. blkwidow

    blkwidow Proven Member

    243
    2
    Joined Sep 15, 2005
    San Diego, California
    Ehhh quit complaining. I know this guy who took his new EVOIX to an exhaust shop. They hacked off the exhaust and replaced it with a Ford Ranger exhaust. I've never heard anything worse. It kills me so much about what he has and is going to do I'm debating on whether or not start a thread on it.
     
  8. dsm-onster

    dsm-onster DSM Wiseman

    8,218
    92
    Joined Jul 11, 2004
    Bloxom, Virginia
    Stock cams :) .

    The 14b compressor map rolls out to 0.23 m^3/sec at it's farthest point. 1m^3 = 35.3ft^3. So we see approximately 487cfm on the compressor map. This yields AROUND 33lbs/min (1 atm and around 20* celcius). We all know that 33lbs/min comes to approximately 350 crank hp. This is very close to 300whp. Of course, the 6cm^2 turbine housing is much too restrictive to accomplish this w/ any sort of ease. A clip or a 7cm^2 housing would allow one to see the maximum flow the 14b compressor can yield.

    27 psi is way above that flow by a normal rev limit even w/ stock manifolds, cams, ports, valves, and stroke.
     

    2K  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  9. TerribleTSi

    TerribleTSi Proven Member

    115
    0
    Joined Sep 20, 2007
    El Paso, Texas
    +1 ^^
    i ran a closed waste gate on my car it only hit 23psi. i've never seen a 14b hit 27psi, and i know alot of people in my town that push there car to the limit. they just cap off there wastegate actuator and only get about 22-24psi.

    27psi is way out of efficency anyway. your probably making the same power at 20psi. i hope you have an enormous front mount.
     

    324  0

    1992 Eagle Talon TSi AWD
    manual · 1G DSM
    Loading...
  10. turboglenn

    turboglenn Proven Member

    5,401
    95
    Joined Nov 5, 2007
    RIpley, West Virginia

    Don't get me wrong, I love the tone, but there's a point midway between idle and cruising rpm while accelerating ( right around 3k RPM ) and it's loud and annoying, i know this from driving next to my car and driving with teh hatch part open because i had something too big in teh trunk :p. I've always apreciated all the grand nationals i've worked on. Super quiet and tons of power at the same time, lovely it is :) That's also why i want to route my waste gate back into teh down pipe. i just wanna hear the engine whine and the turbo whistle :)
     
  11. ilikespeeding

    ilikespeeding Proven Member

    620
    4
    Joined Nov 13, 2005
    Greenville, North Carolina
    I don't really know if you're calling BS here or not, but I can promise you I have run 27 psi. I would have no reason to lie. The only other possibility is that my boost guage isn't accurate. I ran 23 psi daily before my tensioner went out.

    I have stock cams and a stock intercooler as well.
     

    387  0

    1995 Eagle Talon TSi
    manual · 2G DSM
    Loading...
  12. dsm-onster

    dsm-onster DSM Wiseman

    8,218
    92
    Joined Jul 11, 2004
    Bloxom, Virginia
    27psi to redline?

    It's not that I'm calliing what you posted BS or anything of the sort. . . I just cannot believe you. I know what the 14b can do. That is not it. BUT! I'm certainly not always right. And boost gages certainly are not always right.

    A stock 14b 6cm^2 turbine housing could have something to do with your final VE and being able to run that boost. But you're certainly not going to have much gains, if you are truely running 27 psi.

    What is your peak %IDC, if you have that information?

    Back on topic :p , I noticed a tone change swapping from a 6cm^2 turbine housing to a 7cm^2 turbine housing. The note was louder and more raspy. Teh turbine side really controls the sound of exhaust as much as muffling. It is form of muffling but puts that lost energy to work. A t25 sounds great, because it really traps that exhaust flow good (and to it's detriment, even stock). You'll not like the sound of any turbo upgrade from here on out if the 14b is too loud/ricey.
     

    2K  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  13. KPEclipse

    KPEclipse Proven Member

    281
    1
    Joined Dec 14, 2003
    South Jersey, New Jersey
    So when you upgraded from the 14b to anything bigger the exhaust note will change? I thought I was crazy thinking my t25 sounded different than my 14b but maybe I wasnt...I'm about to go to the 16g, that'll change it even more huh?
     

    343  0

    1995 Mitsubishi Eclipse GST
    14.300 @ 0.000 · 2G DSM
    Loading...
  14. dsm-onster

    dsm-onster DSM Wiseman

    8,218
    92
    Joined Jul 11, 2004
    Bloxom, Virginia
    Not as much as a 14b swap from a t25, but yes. Swap a 16g for a t3 stage 3 (50-trim), you'll swear you have an exhaust leak.
     

    2K  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  15. Boostjunki84

    Boostjunki84 Proven Member

    353
    3
    Joined Oct 12, 2007
    Candler, North Carolina
    I just have a custom 3" exhaust with Dynomax race muffler; it's pretty loud at WOT, but not so bad when i'm just cruising around. It has a nice, deep, throaty tone to it. Of course, my turbo is quite a bit bigger than a 14b; that may have something to do with it.:D:talon:
     

    328  0

    1996 Eagle Talon TSi
    manual · 2G DSM
    Loading...
  16. eclipsh

    eclipsh Proven Member

    1,384
    51
    Joined Jun 16, 2005
    Durango, Colorado
    eclipsh

    2K  0

    1999 Mitsubishi Eclipse Spyder GST
    awd · manual · 2G DSM
    Loading...
  17. KPEclipse

    KPEclipse Proven Member

    281
    1
    Joined Dec 14, 2003
    South Jersey, New Jersey
    funny you say that, because after my b16g I'm planning on doing a 50trim...
     

    343  0

    1995 Mitsubishi Eclipse GST
    14.300 @ 0.000 · 2G DSM
    Loading...
  18. freshlane

    freshlane Proven Member

    392
    0
    Joined Sep 4, 2006
    Windy City, Illinois
    I have a 2.5in with a glass pack and I love it. It sounds comparable to my buddies 2.5 with a magnaflow.
     

    489  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  19. dsm-onster

    dsm-onster DSM Wiseman

    8,218
    92
    Joined Jul 11, 2004
    Bloxom, Virginia
    Great! :) I liked my exhaust note. Itsouned terribe at 2500 rpm, but who cares. . . It sounded 'built european' at WOT and +3500rpms.
     

    2K  0

    1990 Mitsubishi Eclipse GST
    manual · 1G DSM
    Loading...
  20. Galaxy

    Galaxy Proven Member

    261
    2
    Joined Aug 17, 2002
    Gainesville, Florida
    My first DSM was a 1.8 (little to do with a turbo exhaust note but its all I got for relavant info) and I put a "flex section back" 2.5 with a stainless straight through Magnaflow on it,the second I started it afterward,I hated it!!!

    It sounded exactly like all the "only mod is a muffler" Hondas out there because thats basically all it was, but my point was, I hated it too. Raspy tin-can rattle from the muffler at a certain RPM and it was embarrassing to drive.

    What I did to fix it was buy a 24" glasspack and weld that in where the cat was,ended up pretty much a resonator just like you were thinking so I would try that,I think it was around $30 and mellowed out the exhaust tone and sounded alot more like I was originally hoping for.

    I now have a turbo 1G with a 3"stainless downpipe except about an inch before the 02 housing it necks down to 2.5".The rest of the exhaust bolted to the downpipe is all mandrel bent 3" with one little pressbent section that goes under the axle and up to the Flowmaster and I love the sound of it!!! I just fired it up after the build and my girlfriend said "damn,it sure sounds good but it doesn't sound like a 4 cylinder",haha.

    When I upgrade the turbo and round up a 3" 02 housing I'll replace the 2.5 section in the DP and replace that pressbend with a mandrel and I'd like to put a true N1 on the end.

    I like the sleeper look of the flat black flowmaster with an 8" section of pipe on the end.rather stockish lookin but noticeably bigger if your lookin for it.The beat ass paint gives it a "no way that heap is fast" look also,haha.
     
  21. meliketoball

    meliketoball Proven Member

    999
    4
    Joined Jan 4, 2007
    Bay Area, CA, California
    Video or shens?
     

    632  0

    1999 Mitsubishi Eclipse GST
    manual · 2G DSM
    Loading...
  22. viperlp01

    viperlp01 Proven Member

    2,148
    68
    Joined Oct 9, 2006
    Kalamazoo, Michigan
    All i know is my apexi with no cat and no res sounds so deep it is silly. My brother was driving next to me and he thought that im am over 300 hp with the sounds that my car makes. It is very deep and never ever gets raspy or ricey. I am with apexi for a while until i come across an HKS carbon fiber one that is cheap.
     

    2K  0

    1997 Eagle Talon TSi AWD
    9.737 @ 140.310 · 2G DSM
    Loading...
  23. KPEclipse

    KPEclipse Proven Member

    281
    1
    Joined Dec 14, 2003
    South Jersey, New Jersey
    Yea I want that HKS CF muffler too, but its over 300 just for the muffler!!!

    For that price you might as well buy the whole catback section! Thats crazy, and it's hard to find a muffler(carbon) with the burnt tip and goldish tint...
     

    343  0

    1995 Mitsubishi Eclipse GST
    14.300 @ 0.000 · 2G DSM
    Loading...
  24. ilikespeeding

    ilikespeeding Proven Member

    620
    4
    Joined Nov 13, 2005
    Greenville, North Carolina

    Its been a few months since she's run, but I think she fell off a little toward redline. I have ECU+, but the only log I still have is with the car off, just testing IAT and TPS. If you want to spend the effort, time, and harddrive space to download ECU+, I'll see if I can find an old log on my old laptop with records of duty cycle and boost. I'm sure at that point I was running 24-25 psi; it boosted alot harder after I replaced the exhaust gasket.
     

    387  0

    1995 Eagle Talon TSi
    manual · 2G DSM
    Loading...
  25. thekellbeast

    thekellbeast Proven Member

    653
    6
    Joined Jun 28, 2003
    Portland, Maine
    If it's too loud, you're too old. Keep rocking it!

    Edit: just make sure your car has the timeslip to back up the noise.
     

Share This Page

Support Vendors who Support the DSM Community
Archer Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RixRacing RockAuto SouthBay Fuel Injectors STM Tuned Track Decals Track Sculptures VR Speed Factory