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b18b_turbo
Trinituner Peong
Joined: 01 Apr 2007
Tech posts: 412
Location: A world where TriniTuner is unbiased.....guess I live nowhere.....hmmm
My 2NRide: Datsun 120Y
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 Posted: Tue May 20, 2008 11:03 am
Post subject: HELP: Spec-B Turbo Back Exhaust Upgrade |
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check link for product:
http://cobbtuning.com/products/?id=3401
I'm upgrading my Legacy just Turbo Back Exhaust and ECU retune....
Will this Turbo Back Exhaust work on my Spec-B?
I'm looking around for one of these to buy but only finding it here (link above) which is an American company....The GT in America is a 2.5T engine while the JDM Spec-B is a 2.0T. Mind you, the American GT does less hp than the JDM spec-B
Q: Would this upgrade be different from the JDM equivalent? I am thinking that the exhaust upgrade should be the same, but i need a professional opinion.
Also, would the geometry of the piping be different in the USDM? Or is it the same?
Last edited by b18b_turbo on Tue May 20, 2008 11:26 am; edited 1 time in total |
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Knight1
Riding on 17's
Joined: 17 Aug 2005
Tech posts: 1301
Location: On terra firma
My 2NRide:
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Posted: Tue May 20, 2008 11:13 am
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Piping runs for a catback should be similar. Differences (if they exist) may lie in pipe lengths etc, due to the USDM having more flanges and whatnot.
This is why, e.g. a USDM STi catback is about 4" longer than a "pure" JDM STi catback.
Other than that, you may need to double check what turbos are used.
| Quote: | Mind you, the American GT does less hp than the JDM spec-B
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And....you should also realise that the engine is a bit detuned in the USDM model, to make a clear cut difference between the Impreza STi and the Legacy GT.....from a market standpoint. |
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b18b_turbo
Trinituner Peong
Joined: 01 Apr 2007
Tech posts: 412
Location: A world where TriniTuner is unbiased.....guess I live nowhere.....hmmm
My 2NRide: Datsun 120Y
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Posted: Tue May 20, 2008 11:23 am
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Knight1, thank you very much for that very helpful post.
Would you or anyone have a map of the exhaust system in a Legacy Spec-B? It would be helpful to email it to the company and have them take a look at it.
| Knight1 wrote: |
Other than that, you may need to double check what turbos are used. |
The dealer told me that it is TWIN TURBO, but I am yet to check that for myself, i did not get time to go remove the plastic covering over the engine. I will also have a field day finding everything as i am new to the scooby camp. The turbo(s) should be located somewhere below the Intercooler right? |
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Knight1
Riding on 17's
Joined: 17 Aug 2005
Tech posts: 1301
Location: On terra firma
My 2NRide:
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Posted: Tue May 20, 2008 10:25 pm
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| Quote: | The dealer told me that it is TWIN TURBO, but I am yet to check that for myself, i did not get time to go remove the plastic covering over the engine. I will also have a field day finding everything as i am new to the scooby camp. The turbo(s) should be located somewhere below the Intercooler right?
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At the risk of making another "helpful" post.....
Your car doesn't have a twin turbo. That stopped with the previous model Legacy. Newer GT's and SPec B's carry a twin SCROLL turbo. It's a single turbo...with a different turbine design as used in newer Imprezas....v.s. to say...a "regular" turbo.
IIRC the stock GT JDM uses an IHI VF38 turbo. I'm not sure whether the Spec B carries a different turbo....I doubt it does. That should help COBB determine whether it can work. You should confirm this with say...something like a UK Legacy owners forum or something.
As for the location of the turbo....I think Polydor made a post with the "basic layout for a Subaru engine bay".
That should help out.....engines are practically identical. |
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Maserati
Trying to catch PATCH AND VEGA
Joined: 26 May 2003
Tech posts: 6367
Location: not in Waterloo :-(
My 2NRide:
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b18b_turbo
Trinituner Peong
Joined: 01 Apr 2007
Tech posts: 412
Location: A world where TriniTuner is unbiased.....guess I live nowhere.....hmmm
My 2NRide: Datsun 120Y
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Posted: Wed May 21, 2008 8:59 am
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Thanks fellas!
The turbo is where i thought it was....thanks Maserati
i will post in a UK forum also but can anyone source specs on the JDM turbo back exhaust and the equivalent USDM specs? These things are so hard to find!
I know it should be the same, but u never know, ESPECIALLY for exhausts in the US as a result of strict emission laws. |
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