I am thinking of getting an exhaust soon. I am for sure getting DC headers (4-2-1), but I wanted to know if I could get a custom exhaust cheaper than a DC exhaust which runs close to $450. I guy I work with said when he did his exhaust on his jeep, he had a muffler shop customize it with mandrel bent tubing and just put a Flowmaster muffler on it. They only charged him $150. Can I just buy a DC muffler, and then have the tubing done seperately in 2.25 piping? Do they even sell DC mufflers separately?
Custom Exhaust
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http://www.dcsports.com/TCS.html
http://www.dcsports.com/CB.html
it does not appear that the dc sports people sell a separate axle back kit...just straight-through catback & twin-pass catback kits only.
ask if they can make you a stepped antireversion system...2 1/4 in. after the cat for 2 ft in length, and the remaining length at 2 3/8 in.
http://www.dcsports.com/CB.html
it does not appear that the dc sports people sell a separate axle back kit...just straight-through catback & twin-pass catback kits only.
ask if they can make you a stepped antireversion system...2 1/4 in. after the cat for 2 ft in length, and the remaining length at 2 3/8 in.
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If you mean stepped diameters (larger diameters as you go downstream with the exhaust flow)...yeah, it helps reversion, but it's not sumthin you have to get. I have 2.5" tubing all the way down the catback. As long as there are zero bottlenecks in the system, you ought to be fine.
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MD - let's say i get a 4-2-1 header with a 2" OD collector and a car sound cat with a 2.25" ID. wouldn't stepping down from 2.25" ID of the cat to 2.25" OD (= 2.12" ID) of the piping create a turbulence hence hurting the exhaust flow? wouldn't it be better to just attach a 2 3/8" OD piping to the cat therefore creating a true stepped design? i'm just a little confused here...Michael Delaney on Jul/25/02 said:
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Well, I'm not MikeD but I'm pretty sure that he would agree w/ me on this one.....
Assuming that you get a header w/ a 2" collector > 2.25" ID carsound. Sticking w/ a 2.25" OD exhaust would in fact create a choking effect on the transition from the cat (2.25" ID) out to the b-piping and back (2.12" as you stated).
To acheive a consistent diameter exhaust system, you should look into an exhaust with 2 3/8" OD piping so that your exhaust system would maintain a 2.25" ID from cat all the way to end at the exit of the muffler. Apex's World Sport cat back uses 2 3/8" piping and a chambered muffler....perhaps you may want to look at that one.
In Mike's articles he touches on the concept of the ideal exhaust system stepping up in diameter about every 2 feet. However the costs of creating a system like this are WAY expensive and keep manufactures from doing this on a macro level.
Assuming that you get a header w/ a 2" collector > 2.25" ID carsound. Sticking w/ a 2.25" OD exhaust would in fact create a choking effect on the transition from the cat (2.25" ID) out to the b-piping and back (2.12" as you stated).
To acheive a consistent diameter exhaust system, you should look into an exhaust with 2 3/8" OD piping so that your exhaust system would maintain a 2.25" ID from cat all the way to end at the exit of the muffler. Apex's World Sport cat back uses 2 3/8" piping and a chambered muffler....perhaps you may want to look at that one.
In Mike's articles he touches on the concept of the ideal exhaust system stepping up in diameter about every 2 feet. However the costs of creating a system like this are WAY expensive and keep manufactures from doing this on a macro level.
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blue - i believe the chambered design of the apexi ws muffler will restrict exhaust flow more than others with a straight thru muffler. since you have already recommended an exhaust to me, can you recommend a 60 mm cat-back with a straight thru muffler that's going to be reasonably quiet? (i know, i want everything and then some) i'm considering the greddy sp or the tanabe hyper medallion... anything else you can think of?
or should i just go custom altogether?
or should i just go custom altogether?
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D:
You are correct in assuming that the chambered design of the WS will in fact be more restrictive than a straight thru desing like an Apex N1 or Comptech muffler. I'm not sure that I can recommend a straight thru muffler to you that will be reasonably quiet because I have no idea what your definition of quiet is.
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The Hytech catback exhaust utilizes a twin pass system (similar to DC) which consists of two small straight thru mufflers to kill the sound. Apparantly its just a bit louder than the oem system. Other than that, most of the straigt thrus will be fairly "boomier" than a chambered design. As you know the exhaust from both of these companies are really pricey. on your application (LS w/ mild boltons) I think the whp compromise between a chambered WS vs. a straight thru would be fairly small, assuming that you sized the rest of your exhaust system properly.
Just an FYI....the Tanabe exhausts are not quiet by any means. I've heard the greddy evo (not the SP) and its about as loud as my comptech. PM Mike D or Surfer if you're interested in the SMSP or Hytech-I'm sure they can give you lots more information on the specs of each company's system than I can. Unless you go w/ one of those.....you're going to have to chose what is most important a quieter car or all out no holds barred performance.
You are correct in assuming that the chambered design of the WS will in fact be more restrictive than a straight thru desing like an Apex N1 or Comptech muffler. I'm not sure that I can recommend a straight thru muffler to you that will be reasonably quiet because I have no idea what your definition of quiet is.
The Hytech catback exhaust utilizes a twin pass system (similar to DC) which consists of two small straight thru mufflers to kill the sound. Apparantly its just a bit louder than the oem system. Other than that, most of the straigt thrus will be fairly "boomier" than a chambered design. As you know the exhaust from both of these companies are really pricey. on your application (LS w/ mild boltons) I think the whp compromise between a chambered WS vs. a straight thru would be fairly small, assuming that you sized the rest of your exhaust system properly.
Just an FYI....the Tanabe exhausts are not quiet by any means. I've heard the greddy evo (not the SP) and its about as loud as my comptech. PM Mike D or Surfer if you're interested in the SMSP or Hytech-I'm sure they can give you lots more information on the specs of each company's system than I can. Unless you go w/ one of those.....you're going to have to chose what is most important a quieter car or all out no holds barred performance.
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custom exaust is a lot cheaper and way to go in my opinion
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Just had an idea....instead of you buying the whole catback from Hytech. Call them and see if they will sell you the muffler section only (as I am sure that its cheaper than the whole catback system) and then mate that up to some custom piping.
I found a pic of the Hytech twin pass
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The method used with this muffler to reduce noise is mainly absorption. The pulses have to travel through the muffler twice, which basically makes the muffler twice as long with twice the sound killing power. Also some acoustical tuning goes into making a muffler like this as well. With brass wind instruments, you change the note by selecting different length tubes for the air to travel. Longer tubes will give a deeper note while shorter tubes give a higher note. This type of muffler basically lengthens the tube, allowing sound waves to spread out and emit a deeper tone once exiting the system. The twin-pass design flows as well as a straight-through but will sound much quieter.
-SurferX, Exhaust design effects on noise article
I found a pic of the Hytech twin pass
The method used with this muffler to reduce noise is mainly absorption. The pulses have to travel through the muffler twice, which basically makes the muffler twice as long with twice the sound killing power. Also some acoustical tuning goes into making a muffler like this as well. With brass wind instruments, you change the note by selecting different length tubes for the air to travel. Longer tubes will give a deeper note while shorter tubes give a higher note. This type of muffler basically lengthens the tube, allowing sound waves to spread out and emit a deeper tone once exiting the system. The twin-pass design flows as well as a straight-through but will sound much quieter.
-SurferX, Exhaust design effects on noise article
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if you want a quiet 60mm straight thru: Tanabe G-power 60mm straight thru design. Cut the 1.8 in. ID bottleneck at the cat flange and get an SMSP flange welded on there. Quiet and not as loud as the Racing Medallion since the resonator is longer and the muffler is huge.
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I have custom 2.5 inch from the cat-back w/ a apex N1 muffler. If you want it you can take it for a resonable price. only 1 month old. Ohh yea i have a 96 tegra RS
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Not to piss on your parade but.....ICC96INTEGRA on Aug/05/02 said:
I believe Dragon is looking for a straight thru design that muffles as much sound as possible. The Apex N1 is notorious for being relatively loud. Plus, 2.5" is too big for the mods that he says he is adding.
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thank God BlueTeg is here or else I'd be pulling my hair out and looking like mini-me...
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that makes sense. besides the apexi ws, are there any other 60 mm exhausts that use a chambered muffler? i don't know of any...BlueTeg on Aug/05/02 said:
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yo, icc. i'll let you know when i get my turbo. thanks.ICC96INTEGRA on Aug/05/02 said:
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No prob. Ill probably still have it. I am looking into the HKS hyper (Black) Looks freakin sweet....
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