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  • HANDBLT
    replied
    Originally posted by EVOIIIM3


    Super Sprint also makes a 60mm Stainless system with or with out cats.

    You got a part number or link? All I can find is 50mm?

    Tony

    Leave a comment:


  • Bavarian3
    replied
    Originally posted by ADA///M
    How loud is that?
    Well that depends. At high RPM very loud, almost as loud as the Henna with straight pipes. But it's not annoying, at least to me.

    Leave a comment:


  • Stan
    replied
    Whatever you do, make sure the stuff can take the heat. With a cat / closed loop, downstream has an easier life. But with no cat even the rear muffler can get "heat stroke".

    Stan

    Leave a comment:


  • HANDBLT
    replied
    Originally posted by John
    I have 63 mm OD (2.5 ") (or 60 mm ID) dual pipes
    all the way thru the muffler, the muffler tips
    are 76 mm each. Orignally, the system had
    2 metal (200 cell) cats and a rear muffler
    (that was rather empty). It was extremely
    loud on my engine (loudness is also
    very much engine dependent). You could not
    hear the airbox with this exhaust system.

    So we went back to the drawing board and
    reopened the rear muffler, wrapped the straigh
    thru pipes in ceramic weave mats and then filled
    it to the max with wool. That quieted it down
    quite a bit, but it was still simply too loud.
    Back to the drawing board again...and had
    2 center mufflers (1 per pipe) made that sit
    right behind the cats. They are also of the
    stright thru design. Now the noise level
    is much more tolerable with no bad resonances.
    It is still louder than stock however.
    It gives a nice aggressive sound, but without the
    droning noises and I can hear the airbox once
    again.

    John
    This is what I was talking about doing earlier. Getting the 50/55 header. Then getting the SS 60mm race center section and adding Magnaflow resonators in the center section. Then either keeping the SS muffler and adding larger inputs, or just getting another Magnaflow with dual in and outs for the final backbox.

    T

    Leave a comment:


  • John
    replied
    I have 63 mm OD (2.5 ") (or 60 mm ID) dual pipes
    all the way thru the muffler, the muffler tips
    are 76 mm each. Orignally, the system had
    2 metal (200 cell) cats and a rear muffler
    (that was rather empty). It was extremely
    loud on my engine (loudness is also
    very much engine dependent). You could not
    hear the airbox with this exhaust system.

    So we went back to the drawing board and
    reopened the rear muffler, wrapped the straigh
    thru pipes in ceramic weave mats and then filled
    it to the max with wool. That quieted it down
    quite a bit, but it was still simply too loud.
    Back to the drawing board again...and had
    2 center mufflers (1 per pipe) made that sit
    right behind the cats. They are also of the
    stright thru design. Now the noise level
    is much more tolerable with no bad resonances.
    It is still louder than stock however.
    It gives a nice aggressive sound, but without the
    droning noises and I can hear the airbox once
    again.

    John

    Leave a comment:


  • ADA///M
    replied
    Originally posted by Bavarian3
    Tony,

    I have stock headers (boo) but why not do what Gustave did? (Ironhead mentions this) 3" piping? This is what I have done on the Alpineweiss and on the Henna 2.5 (also stock headers) but on the whitey, 3" piping to XR1 oval Borla Muffler to XR1 round Borla muffer and on the Henna, straight pipes to Borla muffler XR1. All ofcourse using Y-pipes.

    How loud is that?

    Leave a comment:


  • Bavarian3
    replied
    Tony,

    I have stock headers (boo) but why not do what Gustave did? (Ironhead mentions this) 3" piping? This is what I have done on the Alpineweiss and on the Henna 2.5 (also stock headers) but on the whitey, 3" piping to XR1 oval Borla Muffler to XR1 round Borla muffer and on the Henna, straight pipes to Borla muffler XR1. All ofcourse using Y-pipes.


    Leave a comment:


  • vodomagoo
    replied
    on my car my exaust guy went from the cats back with dual 2in pipes to a dynomax welded race muffler that is 3in in and out making the muffler the collector. noise is low and tastefull and this is on a 3.0 s50. if i didnt have cats we would have run 3in back but with the cats in place you might as well run the same size as them. hes made a few s14 systems that he used 3in back with out the cats and said it flowed and sounded nice

    Leave a comment:


  • EVOIIIM3
    replied
    What about the System John has on his car?

    Super Sprint also makes a 60mm Stainless system with or with out cats.

    If I even get the CC down and get some cash I'm going to have John send me a system with some nice cams.

    Leave a comment:


  • Ironhead
    replied
    So the 50/50 header would be better huh?
    I don't know if it's "better", but it would definitely be easier and simpler.

    To know which is better in terms of flow, torque, and HP would take a lot of dyno testing, etc. Don't know anyone who has done it.
    Last edited by Ironhead; 04-24-2004, 04:01 PM.

    Leave a comment:


  • ADA///M
    replied
    go with the 50/50 system....header and then SS center and muffler...

    Just my opinion

    Leave a comment:


  • HANDBLT
    replied
    Originally posted by Ironhead
    Mating to the 50/55 header is what drove me to get a custom exhaust in the first place. There isn't any other good way I know of, other than just buying the Sport EVO exhaust. I actually considered that, but it costs around $1800 and there was some doubt that it used the same hanger arrangement from the subframe as the stock one does.

    You "can" enlarge the bolt holes slightly and bolt pretty much any system to the 55 mm header, but there will be a large "step down" in tube size that can't be good for flow.

    I assumed you were planning a new rear muffler, because the Supersprint would have way less than 2.5 inch pipes. I don't think there would be any point in building a 2.5 system then running it through the Supersprint.....

    This is a dilemna. If I was doing it over again I might have used a different header. Then you have more exhaust options.

    So the 50/50 header would be better huh?

    T

    Leave a comment:


  • Ironhead
    replied
    Mating to the 50/55 header is what drove me to get a custom exhaust in the first place. There isn't any other good way I know of, other than just buying the Sport EVO exhaust. I actually considered that, but it costs around $1800 and there was some doubt that it used the same hanger arrangement from the subframe as the stock one does.

    You "can" enlarge the bolt holes slightly and bolt pretty much any system to the 55 mm header, but there will be a large "step down" in tube size that can't be good for flow.

    I assumed you were planning a new rear muffler, because the Supersprint would have way less than 2.5 inch pipes. I don't think there would be any point in building a 2.5 system then running it through the Supersprint.....

    This is a dilemna. If I was doing it over again I might have used a different header. Then you have more exhaust options.

    Leave a comment:


  • HANDBLT
    replied
    I plan on keeping the SS muffler I have (if it will mate up), PLUS the Magnaflow for a resonator.

    Maybe I should just buy the 50/50 SS center section and the 50/50 header?

    What is the best way to get something mated to the 50/55 header?

    Tony

    Leave a comment:


  • Ironhead
    replied
    I wrestled with the same questions. When I was ready for an exhaust, I wanted to stay with a dual arrangement for purposes of ground clearance and to keep the appearance similar to stock.

    There are some problems though. Unless you are making an exhaust for a racing car, you NEED to have a really large muffler on these cars, or they end up very loud. None of the dual in/out mufflers that were available seemed like they would work. They were either way too small, or had the inlets and outlets separated by five or six inches. From a packaging point of view, it would not really work on an E30M3. I surveyed pretty much everything made by Borla, Magnaflow, and a few other companies. I could not find a combination of dual mufflers that I thought would work well, unless you are willing to go with a small muffler and thus a loud car.

    I wound up going with a single 3" for these reasons. I pretty much duplicated the setup Gustave Stroes used on his exhaust, same Magnaflow muffler and Borla resonator. This is, again, a LARGE muffler. Combined with the resonator muffler, the car is STILL fairly loud. Louder than stock, but tolerable. I don't think the parts are available to make a dual exhaust that is reasonably quiet.

    The other issue, is I went with a fairly high end shop (SPD in Sacramento) to build the thing. They are not cheap, and a dual exhaust would have cost a lot more in terms of labor and materials involved. I also wanted a "modular" exhaust in the sense that I could remove the resonator and replace it with a cat or straight pipe with "V" band clamps. If you think about it, fabricating and packaging this sort of setup with a dual exhaust would be very complicated.

    The only real down side to the single exhaust is that you need to start it with a quality "Y" pipe. SPD and Burns can build top notch "Y" pipes. Not cheap, but I am sure no more expensive than a quality "X" pipe you would need for your dual system anyway.

    As it turned out, SPD packaged the exhaust in such a way that I really don't think I lost any ground clearance from the stock system. It is very neatly tucked in, and they ovalized the tube where it passes under the rear subframe.

    HTH
    Last edited by Ironhead; 04-24-2004, 11:59 AM.

    Leave a comment:

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