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Old 03-10-2006, 01:02 PM   #1
scooter4483
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Default turboback or catback w/ dp

i was doing some research on cobb and reviewing some of the members setups. Would i get more gains with a tbe mapped w/ stage2 or a cbe and a dp mapped to stage 2? in the long run which would be better for more tuning? Are there any pros or cons to either? i will also be running with the cats. sorry if this has been posted somewhere b4.

i am leaning toward a hks catback, but not sure which dp would go great with this setup to get the most gains. any thoughts? thanks clan.
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Old 03-10-2006, 01:18 PM   #2
boundy3
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I don't know where to start with this question.

A Turbo-back exhaust consists of a full length DP and a cbe, or a shorty dp with a race/catpipe and a cbe. So basiclly a tbe = a cbe and DP.

Depending on what type of downpipe (bellmouth, divorce wg, flat plate) you are using the results will be different, how different depends on how much power you plan on making. Most cbe will make similar results considering the same piping diameters.

By running with the cats do you mean you will be using a shorty dp and the stock midpipe(catpipe). If so you will be leaving a little power on the table vs. running a full length catless downpipe.

As far as my suggestion, get a full length divorced wg or bellmouth downpipe and throw on what ever cbe you want.

Please do more research there is plenty of info about this topic on NASIOC.
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Old 03-10-2006, 01:29 PM   #3
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Any dp will be fine. An Invidia Bellmouth DP is a good, inexpensive dp to mate to any catback.

The HKS yields good returns, but is too noisy for my taste. You may want to check the sticky's on this forum to hear som exhaust clips.
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Old 03-10-2006, 01:47 PM   #4
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thanks for the responses. i know that a tbe=cbe + dp. i still want all my cats on the car so i guess i will be leaving the midpipe on the car. I do want a lot of gains, as i dont care for the sound as long as its not extremely loud, i do like the sound of the hks, so something within that range. I think i can get more gains with an hks cbe + a dp(dont know which are good), then a full tbe. I'm not sure. What dp's give good gains? i heard invida and helix are pretty good.
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Old 03-10-2006, 01:49 PM   #5
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also, arent catless items illegal?
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Old 03-10-2006, 02:55 PM   #6
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Posting in the wrong forum....bad
Not reading the sticky in the right forum....worse

Get with the program!!!
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Old 03-10-2006, 02:56 PM   #7
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Just go catless and keep your stock downpipe for emissions purposes. But a catless HKS catback will be loud. If you want the HKS just get it, and get an invidia or helix DP. They are inexpensive and work fine. Catless ftw
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Old 03-10-2006, 02:56 PM   #8
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uh oh Unabomber got ya...
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Old 03-10-2006, 03:23 PM   #9
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sorry, didnt know where to post it. but then again, nasioc with its smart@$$ replies.

Anyway:

Quote:
Originally Posted by PattyB69
Just go catless and keep your stock downpipe for emissions purposes. But a catless HKS catback will be loud. If you want the HKS just get it, and get an invidia or helix DP. They are inexpensive and work fine. Catless ftw
i should go with a catless hks? i'll still look into it. will i get similar gains to a tbe if i went w/ an hks catback (with cats) and a helix dp? are dp's catted and uncatted? im as dumb as rocks when it comes to exhaust setups/systems.
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Old 03-10-2006, 03:46 PM   #10
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Quote:
Originally Posted by scooter4483
sorry, didnt know where to post it. but then again, nasioc with its smart@$$ replies.

Anyway:



i should go with a catless hks? i'll still look into it. will i get similar gains to a tbe if i went w/ an hks catback (with cats) and a helix dp? are dp's catted and uncatted? im as dumb as rocks when it comes to exhaust setups/systems.

OK. Catback exhaust doesnt have cats. They if anything, some have resonators. A catback is the muffler and the mid pipe behind the muffler that connects to the DP. Its everything from the last cat on the downpipe the muffler. Get it?

A stock WRX Dp has 2 cats in it. Deciding Catted to Catless has to do with the downpipe. Not the Catback. You can choose to buy a Catted downpipe or a catless downpipe (which will remove both cats on the stock DP) . Catted tend to be more expensive. OR you can get a Shorty Dp which only removes the first of the two cats in the downpipe.

For the most power gains a catless downpipe (helix, invidia, perrin, etc) and a catback exhaust( hks, greddy, list goes on) will give you good results. If you choose to go catless just keep your Stock DP so that you can use it to pass emissions. Its all up to you. Some catback are pretty loud. So a loud catback with a catless dp will be pretty loud. The HKS catback with a catless downpipe will be loud, but some mean as hell. If you want to be catless and still be relatively quiet get a catless downpipe and a more quiet catback like a Greddy Evo 2 (which i have and love), or Borla hush. There are also a few others. So its all up to you. Its just mixing and matching really how loud and how you want your exhaust to sound. Your original idea of an HKS catback with a Helix catless downpipe should be a pretty good one. Itll be loud but sound real nice.
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Old 03-11-2006, 12:15 PM   #11
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Quote:
Originally Posted by PattyB69
OK. Catback exhaust doesnt have cats. They if anything, some have resonators. A catback is the muffler and the mid pipe behind the muffler that connects to the DP. Its everything from the last cat on the downpipe the muffler. Get it?

A stock WRX Dp has 2 cats in it. Deciding Catted to Catless has to do with the downpipe. Not the Catback. You can choose to buy a Catted downpipe or a catless downpipe (which will remove both cats on the stock DP) . Catted tend to be more expensive. OR you can get a Shorty Dp which only removes the first of the two cats in the downpipe.

For the most power gains a catless downpipe (helix, invidia, perrin, etc) and a catback exhaust( hks, greddy, list goes on) will give you good results. If you choose to go catless just keep your Stock DP so that you can use it to pass emissions. Its all up to you. Some catback are pretty loud. So a loud catback with a catless dp will be pretty loud. The HKS catback with a catless downpipe will be loud, but some mean as hell. If you want to be catless and still be relatively quiet get a catless downpipe and a more quiet catback like a Greddy Evo 2 (which i have and love), or Borla hush. There are also a few others. So its all up to you. Its just mixing and matching really how loud and how you want your exhaust to sound. Your original idea of an HKS catback with a Helix catless downpipe should be a pretty good one. Itll be loud but sound real nice.
thanks. i understand a lot now. does anyone know where that diagram is floating around here where it shows the catback, tbe, dp, mp, and up in the diagram. i saw it a few times on here
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Old 03-11-2006, 01:34 PM   #12
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Check out Unabombers manifesto stickied on the Newbies thread, lots of good info there.

And here you go:

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Old 03-11-2006, 04:24 PM   #13
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thanks. you guys have been a big help.
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