Hey everyone, im getting ready to purchase a new exhaust and i would like some feed back about what you guys think sounds good on the classic..im considering the Courtesy, HKS and GREDDY..but i know still makes a muffler, and it might sound nice with custom piping, just let me know what you guys think!!

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

<font face="Verdana, Arial" size="2">Originally posted by xTurbo Classicx:
Hey everyone, im getting ready to purchase a new exhaust and i would like some feed back about what you guys think sounds good on the classic..im considering the Courtesy, HKS and GREDDY..but i know still makes a muffler, and it might sound nice with custom piping, just let me know what you guys think!!
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Well... Since you have a turbo, I'd say get a custom cat-back made using 3" piping, mandrel-bent with a good resonator, and a 3" Dynomax Ultraflo (Borla and Edelbrock are also good mufflers.) You'll be making some good power with this set-up, and it won't be too loud as the turbo tends to quiet down the exhaust system a bit. The HKS and GReddy cat-back systems would probably be a bit restrictive for the turbo, though I'm sure others have run those set-ups with DET's without a problem. You won't be making as much power as going with a 3" cat-back. The 2.5" Courtesy b-pipe would be a good compromise, though. Just get a good free-flowing muffler (like what I mentioned above) and you'll have a nice sounding free-flowing system that's not crazy loud.

--Andrew Phan
1993 NX2000 (Borla muffler)
1998 200SX SE-R (Dynomax Ultraflo non-SS muffler)

Definitely custom 3" or 2.5" catback all the way. It would definitely end up being cheaper than the $500-$600 you'll spend on the Greddy or the HKS. Check out Naji's exhaust page. Pretty good write up.

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Antonio Garcia
91 SE-R w/ lots of stuff
Bay Area, CA

custom mandrel bending cost more though

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

<font face="Verdana, Arial" size="2">Originally posted by xTurbo Classicx:
custom mandrel bending cost more though

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Well... if you can find your own mandrel-bent piping and buy it, all the muffler shop would need to do is to weld it all together, and trust me, it will be cheaper than getting a GReddy or HKS exhaust. Besides, why would you want to get those for a turbo car? They would be restrictive on a turbo car. Antonio said to check out Naji's exhaust page for more info. Here's the URL:

http://www.geocities.com/n_dahi/exhaust/exhaust.htm

Most of what he wrote mainly pertains to naturally aspirated cars, but some can apply to turbo cars, as well. I urge (heh, I said urge... heh!) you to read it all. FYI, Naji got his custom exhaust made for $370. That's significantly cheaper than going with a GReddy or HKS exhaust. Don't get me wrong... The GReddy and HKS exhausts are great systems, but they were made for a naturally-aspirated application (in the case of the SR20) which won't be of much benefit to a turbo car as compared to a custom-made 3" exhaust system. The muffler and resonator will be cheap, the rest will be labor.

--Andrew Phan
1993 NX2000
1998 200SX SE-R

intresting, i may go custom where do you find mandreal bent piping?

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

You can find mandrel bends at JCWhitney. Give them a call or look it up on www.jcwhitney.com. (http://www.jcwhitney.com.) You could also just go with a 3" crush-bent exhaust. That would work too. Any muffler/exhaust shop can (should be able to) do that for you easily.

Definitely stay away from the cat-back exhaust systems like HKS or Greddy. I have a Greddy SP catback on my SE-R. It's great for NA applications, but it's only 50mm (1.97"!!) piping that's mandrel bent. Running an exhaust pipe that's too small will create too much backpressure depending on what turbo you're using. The only reason I got my Greddy is *** I found it used for $350. Otherwise I would have gone custom. Now that I'm running nitrous and have the cams, I have plans to do 2.25" or even 2.5".

Good luck!

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Antonio Garcia
91 SE-R w/ lots of stuff
Bay Area, CA

If i go crush bent dont you loose power? im led to belive that the only way is mandrel..help me stop me hating and explain how much of a difference it would be with just the crused opposed tot eh mandrel bent setup.

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

<font face="Verdana, Arial" size="2">Originally posted by xTurbo Classicx:
If i go crush bent dont you loose power? im led to belive that the only way is mandrel..help me stop me hating and explain how much of a difference it would be with just the crused opposed tot eh mandrel bent setup.

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Here... DAMMIT! http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif

http://www.se-r.net/header_exhaust/mandrel_crush_bends.htm

RESEARCH man... RESEARCH... You can find a lot of info if you just research rather than ask people to do your own homework. You'll learn more that way... Now if there's a question you cannot find an answer for, then that's no biggie.

--Andrew Phan
1993 NX2000
1998 200SX SE-R




[This message has been edited by RollcageSR20 (edited 07-26-2001).]

whoa, sorry man..ive read that before like 100 times in the past and im still confused from a commit made..thanks, im trying to figure out the true difference from crush bent pipes to mandrel bent pipes. ive read that naji page thanks..and i still have UNANSWERED questions DAMMIT http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

<font face="Verdana, Arial" size="2">Originally posted by xTurbo Classicx:
whoa, sorry man..ive read that before like 100 times in the past and im still confused from a commit made..thanks, im trying to figure out the true difference from crush bent pipes to mandrel bent pipes. ive read that naji page thanks..and i still have UNANSWERED questions DAMMIT http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif

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Crush-bent: Just as the name implies. When a pipe is bent, the section of the pipe that's been bent (the curve) is crushed, and that particular area will not have the same diameter and circumference as the rest of the pipe.

Mandrel-bent: A process by which a pipe is bent with the curve retaining its shape, thus having the same diameter and circumference as the rest of the pipe. The highway analogy in the link I showed you above explains it so much better.

For the least restriction (especially in a turbo car) you would want an exhaust system utilizing mandrel-bends for maximum flow. If ya still don't understand, give up now and leave your car stock! http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif

I know the difference between the two bends..my ORIGIONAL question about the two is the difference in power. will it show on the dyno? its just 5 little crunches on the pipe does that make a BIG difference? thanks for the reference..but it didnt answer my question lol. or should i say this.. Is it WORT paying the extra $$$ for mandrel bent 3' pipes?? or not! http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif

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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]

<font face="Verdana, Arial" size="2">Originally posted by xTurbo Classicx:
I know the difference between the two bends..my ORIGIONAL question about the two is the difference in power. will it show on the dyno? its just 5 little crunches on the pipe does that make a BIG difference? thanks for the reference..but it didnt answer my question lol. or should i say this.. Is it WORT paying the extra $$$ for mandrel bent 3' pipes?? or not! http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif
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Ah... okay... someone here needs to articulate his wording a little better! (hint: it's not me! http://laf.cioe.com/~benbobbo/NonCGI/biggrin.gif) I can't tell you for sure how much of a difference mandrel-bends vs. crush-bends will be, but I can tell you that the difference is greater on a turbo car as compared to a N/A car because a turbo car benefits more from a low restriction exhaust system than a N/A car would.

Is it worth it for mandrel-bends? IMO, yes... Even more so on a turbo car than an N/A car. If you're going turbo, go all out. If you're going to be frugal, stay N/A.

Thank you, thats all i wanted to know. I tend to type choppy when i know what i want to say but i dont know how to say it, sorry.


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-Dennis w/ 91 Classic DET, Tokiko, Eibach and some more SE-Rious Goodies [Aver99ex@aol.com]