Campieri
Porsche 944 Turbo Build
One ride and you'll understand why most rocket scientists are German.
My ZHP Build 2004-2014 RIP
Consigliere
6whp peak from headers/intake. not terrible.
Call me Seth
CURRENT: 2016 Long Beach Blue BMW /// M2
RETIRED: ‘15 F22 M235i | '08 E90 M3 DCT "GoinHAM3" | '04 E46 M3 6MT "WEGOHAM"
'04 330i ZHP | '11 E82 135i | '08 E90 328xi | 07 E91 328xi SportWagon
Originally Posted by danewilson77
Enforcer
I might do headers on the Sedan and add these:
http://www.mandrelbendingsolutions.c...High%2C/Detail
Enforcer
Why do headers at all if you're just going to add cats back in there.
2003 BMW 330i ZHP
ESS Twin Screw Stage 2 - Wavetrac - Headers - Borla - BMW Performance
Turner Motorsports - Powerflex - Hawk Performance
Build thread: http://www.zhpmafia.com/forums/showt...yan-s-2003-ZHP
Wheelwell: 2003 BMW 3 Series
Fuelly: 2003 BMW 330i
Campieri
Clearly to pass emissions. The cats aren't the issue on the stock headers, its the congestion that occurs before them.
Horney...via TT.
Porsche 944 Turbo Build
One ride and you'll understand why most rocket scientists are German.
My ZHP Build 2004-2014 RIP
Soldier
FWIW, some tunes (e.g. Evolve) can turn down the post cat 02 sensitivity while leaving them turned on-- meaning they still show as ready for plug in OBD2 inspection.
I have headers and race cats installed down stream. Race cats, at least good ones, will still be sufficient to pass sniffer tests once they're up to temp. So, as long as you have a friendly shop, you can pass a sniffer with race cats just by taking the car for a hard drive and then immediately pulling in an doing the sniffer test.
Because it makes no difference with my tune and makes running wires less work, I have my post cat 02s in the headers with the pre cat 02s... before the cats.
And... headers do make power, not sure how that was ever in contention
Current Cars: 2005 IR/IR M3, 2001 LMB/blk M5, 2003 530i 5mt, 04 M3 wagon (with ZHP interior and exterior trimmings)
Past cars: 04 M3, 96 M3, S50B32 e36 M3 CM race car, 6mt NA RWD e91
Consigliere
Yes, our tune does that as well.
- Goin' H.A.M. Mobile
Call me Seth
CURRENT: 2016 Long Beach Blue BMW /// M2
RETIRED: ‘15 F22 M235i | '08 E90 M3 DCT "GoinHAM3" | '04 E46 M3 6MT "WEGOHAM"
'04 330i ZHP | '11 E82 135i | '08 E90 328xi | 07 E91 328xi SportWagon
Soldier
which tune is "our" tune?
Current Cars: 2005 IR/IR M3, 2001 LMB/blk M5, 2003 530i 5mt, 04 M3 wagon (with ZHP interior and exterior trimmings)
Past cars: 04 M3, 96 M3, S50B32 e36 M3 CM race car, 6mt NA RWD e91
Consigliere
Eurocharged
- Goin' H.A.M. Mobile
Call me Seth
CURRENT: 2016 Long Beach Blue BMW /// M2
RETIRED: ‘15 F22 M235i | '08 E90 M3 DCT "GoinHAM3" | '04 E46 M3 6MT "WEGOHAM"
'04 330i ZHP | '11 E82 135i | '08 E90 328xi | 07 E91 328xi SportWagon
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