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e36 1jz

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  • E
    E
    e36blownpast
    wrote on last edited by
    #1

    hey im doing the 1jz swap on my 1992 325i and im looking for exhaust advice...i plan on doing all custom straight piping but im aware that i need some back pressure...so i need a muffler...now im not looking for anything that will make my car look like poop so big a$$ cans will not do lol anyone have any advice for an exhaust that does these functions: look clean, sound good, and be free flowing because....well its a boosted engine lol so suggestions?

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    0
    • EarlE
      EarlE
      Earl
      wrote on last edited by
      #2

      A 3" pipe with an 18" resonator, no cat, and a nice free flowing magnaflow would sound great:)

      museum sig 2earl.jpg

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      0
      • 240sxguy2
        240sxguy2
        240sxguy
        wrote on last edited by
        #3

        You definitely don't need or want backpressure.

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        0
        • B
          B
          B C
          wrote on last edited by
          #4

          Magnaflow says it best, plus there is a handy diagram to help size the pipes

          http://www.magnaflow.com/07techtips/faq/question10.asp

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          0
          • KaiserRollsK
            KaiserRollsK
            KaiserRolls
            wrote on last edited by
            #5

            Snap said:

            Magnaflow says it best, plus there is a handy diagram to help size the pipes

            http://www.magnaflow.com/07techtips/faq/question10.asp

            all about that stepped header

            IMG0080.jpg

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            0
            • patsbimmer1P
              patsbimmer1P
              patsbimmer1
              wrote on last edited by
              #6

              240sxguy said:

              You definitely don't need or want backpressure.

              You've got half of it.  In a boosted application you don't need to worry about backpressure but you still want it. The turbo itself creates the backpressure and exhaust resonance necessary for scavenging in the cylinder head.

              Earl said:

              A 3" pipe with an 18" resonator, no cat, and a nice free flowing magnaflow would sound great:)

              This sounds like a good idea to me!  My brother in law ran 2 magnaflows on his A6 2.7t and it sounded like a beast!

              2011 e90 M3 - DCT, Borla exhaust, BMW Performance Black Grille, ECS Painted Corners, Ziza Angel Eyes

              07 335i Stella - sport package, BMS DCI, zhp knob, TMS cf parking brake lever, VRSF downpipes, MHD tune, H&R race springs, other stuff *SOLD*

              97 328i Lola - sport package, m50 intake manifold, m50 manifold.com install kit, custom CAI, K&N filter, Borla exhaust, FK silverline coilovers, 25.5mm front sway bar, Powerflex front sway bushings, Turner Radiator, fan delete *sold*
              95 325is *sold*
              93 nissan 240sx KA-T *sold*

              BMWCCA #473306

              Instagram @patsbimmer1

              AKA- HALLWAY PAT

              "burnouts bring babes and babes dont have time for bushings" - Kaiser Rolls

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              • 240sxguy2
                240sxguy2
                240sxguy
                wrote on last edited by
                #7

                patsbimmer1 said:

                You've got half of it.  In a boosted application you don't need to worry about backpressure but you still want it. The turbo itself creates the backpressure and exhaust resonance necessary for scavenging in the cylinder head.

                This sounds like a good idea to me!  My brother in law ran 2 magnaflows on his A6 2.7t and it sounded like a beast!

                Sorry, I didn't quanitfy my answer by saying "in a boosted application" because we're talking about a 1jz.

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                0
                • Brian.B
                  Brian.B
                  Brian.
                  wrote on last edited by
                  #8

                  Boosted cars you don't want back pressure. I'd run it 3" straight piped off the back of the turbo. Even on a daily application. If you're not man enough for a 3" straight piped car, get a muffler.

                  instagram @howdoyoudrivethat

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                  1
                  • EarlE
                    EarlE
                    Earl
                    wrote on last edited by
                    #9

                    I was always told that the most efficient exhaust for a turbo is about a 5" cone off the hotside. Hood Dump!!

                    museum sig 2earl.jpg

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                    2
                    • D
                      D
                      deek10sn
                      wrote on last edited by
                      #10

                      e36blownpast said:

                      hey im doing the 1jz swap on my 1992 325i and im looking for exhaust advice...i plan on doing all custom straight piping but im aware that i need some back pressure...so i need a muffler...now im not looking for anything that will make my car look like poop so big a$$ cans will not do lol anyone have any advice for an exhaust that does these functions: look clean, sound good, and be free flowing because....well its a boosted engine lol so suggestions?

                      Run it strait back, i run open wg dump and 3" all the way back....your back preasure for the motor is the turbo.

                      Derek

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