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06-25-2003, 11:08 PM | #1 |
Scooby Specialist
Member#: 5885
Join Date: Apr 2001
Chapter/Region:
NWIC
Location: Portland Oregon
Vehicle:2000 RS (GME) SilvAr |
2.25" vs 2.5" exhaust question
Hello, I've not posted in this forum before and am really very new to FI stuff.
I've ordered a TWE header and cat to complement my brullen cat back, all 2.25". If I were to add a (AVO?) turbo, how much performance would you think I'd be loosing by keeping this diameter piping instead of going up to 2.5"??? THanks,
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06-26-2003, 12:01 AM | #2 |
Scooby Specialist
Member#: 1997
Join Date: Jul 2000
Chapter/Region:
MWSOC
Location: Des Plaines, IL
Vehicle:2006 Acura TL 6spd STMGM6 alumni |
Depends on how much power you're running. 2.5" is good upto about 300bhp. so 2.25".... probably good enough for a 5psi kit without much loss. Bigger is always better with the turbo.
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06-26-2003, 01:16 AM | #3 | |
Sooby Guru
Member#: 1914
Join Date: Jul 2000
Chapter/Region:
SWIC
Location: 2014 Q60S, 2016 Chevy SS
Vehicle:2000 2.5RS w/ EJ22T swap and N20. gone. : ( |
Quote:
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06-26-2003, 09:23 AM | #4 |
Subaru Bounty Hunter
Moderator Member#: 7131
Join Date: Jun 2001
Chapter/Region:
TXIC
Location: Houston - Downtown Julie Brown
Vehicle:2015 Outback - Croc Dundee Edition Ice Silver |
you will have to lose the headers when you turbo the car...
but yes, 2.5" would be better for boost... |
06-26-2003, 11:06 AM | #5 | |
Scooby Specialist
Member#: 1234
Join Date: Apr 2000
Location: Vancouver, Canada
Vehicle:2000 |
Quote:
I got a 2.5" exhaust and it works fine with 8 psi. |
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06-26-2003, 12:57 PM | #6 | |
Scooby Guru
Member#: 13617
Join Date: Dec 2001
Chapter/Region:
MWSOC
Location: MN
Vehicle:2001 Legacy GT back to stock is a project too |
which tech works header did you go with? the super stock one? i was told the super stock is best for turbo applications because the high output headers are tuned more for higher end and can only be taken advantage of if you have a raised rev limit.
i am hoping to get some soon once they find out if their older version will fit an automatic. tell me what you think of it once you get it cause it looks like great craftsmanship. Quote:
Ben |
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06-26-2003, 02:19 PM | #7 |
Scooby Specialist
Member#: 5885
Join Date: Apr 2001
Chapter/Region:
NWIC
Location: Portland Oregon
Vehicle:2000 RS (GME) SilvAr |
Yup, Super stock (2.25"), instead of the High output (2.5"). Stock end placement. There are two different ceramic coats available for its mild-steel construction: The shiny, is actually lower temperature rated, for N/A. The dull is for higher temps of forced induction, but more prone to debris chips. I chose the former, but still have time to change to the latter, if going FI with this header seems a reasonable option.
I suppose I'd be obligated to critique these headers once installed, as there are still only a few who have confessed to getting them. I'm open to suggestions. |
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