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how much hp loss with e30 exhaust

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    #1

    how much hp loss with e30 exhaust

    Hey, I recently finished my s52 e30. Untill I knew what I wanted to do, I decided to use the e30 exhaust and just modify the down piping. Im wondering if anyone has any idea on how much power I am losing compared to an average free flowing system. Also, Im still trying to figure out what Im going to do for the exhaust. I just want to make sure that what ever I do doesn't sound ricy or crazy loud.
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    #2
    well ur probably running rich right now considering the small diameter of ur piping, talk to matt, he knows a lot about exhaust.
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      #3
      Originally posted by e30polak View Post
      well ur probably running rich right now considering the small diameter of ur piping, talk to matt, he knows a lot about exhaust.
      Nah, it won't affect the air/fuel ratio.

      You will lose a lot of top end with the e30 setup, maybe as much as 50hp. Depends on how you hack up the downpipes and how clogged the cat is. I would guess it will run fine and have plenty of torque until about 3000RPM then fall on its face.

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        #4
        Im thinking about doing stock obd11 manifolds, custom y into 2.5 piping with magnaflow cat, glasspack, then magnaflow muffler in the back. Any thoughts? does this sound like a good setup?
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          #5
          Originally posted by stilllearning View Post
          Im thinking about doing stock obd11 manifolds, custom y into 2.5 piping with magnaflow cat, glasspack, then magnaflow muffler in the back. Any thoughts? does this sound like a good setup?
          I have that setup with a smaller magnaflow and no glasspack and it's 101db. Thats LOUD.

          You will need a HUGE magnaflow and a resonator (not a glasspack) if you want it quiet.

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            #6
            I yelled into the inlet end of my glasspack. It does provide some sound attenuation. Probably not too much though. :mrgreen:

            Originally posted by whysimon
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              #7
              Originally posted by FredK View Post
              I yelled into the inlet end of my glasspack. It does provide some sound attenuation. Probably not too much though. :mrgreen:

              LOLOLOLOLOLOLOLOLOLOLerssssssss! i just visualized you doing that and it seriously cracked me up.
              It would work even better if there would be an ear of another dude on the opposite end.
              :rofl:

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