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Old 06-10-2007, 02:31 PM   #1
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2.25" exhaust sufficient?

Setup in progress: 14b, 8 psi, DSM SMIC, going to get 42# or higher injectors and a bigger MAF along with a XCal II tune. Shooting for 200whp on a stock Zetec with just a 65mm tb.


Will I be okay sticking with my FS 2.25" exhaust or should I upgrade to a 2.5" or 3" exhaust?


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Old 06-10-2007, 02:37 PM   #2
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I would go to 2.5" if ur gonna be running any kind of boost... 2.25" will work but u will gain a lot more with 2.5"... 3" is something for around 15psi+
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Old 06-10-2007, 03:47 PM   #3
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I would at least go with 2.5
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Old 06-10-2007, 03:58 PM   #4
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2.5 ftw
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Old 06-10-2007, 04:06 PM   #5
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yeah, 2.5" is enough
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Old 06-11-2007, 11:05 AM   #6
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What are you guys using for exhaust, mild steel, aluminized steel, or stainless steel?
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00 ZX3 DD now with over 100K miles
Old turbo: 14b @ 9ish psi: 182.93whp, 188.57wtq (blown seals)
Chinese 16G @ 7psi: 180.62whp 193.6wtq (died at 5,000 rpms)
DSM T25 at 13 psi coming soon (third time's a charm, right?)
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Old 06-11-2007, 11:09 AM   #7
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go with stainless if you can although aluminized will be ok it'll just rust faster.
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Old 06-11-2007, 11:18 AM   #8
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Ok, cool. I'd like to go stainless, but aluminized is $6.50/ft cheaper, so I'll probably go with that.
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00 ZX3 DD now with over 100K miles
Old turbo: 14b @ 9ish psi: 182.93whp, 188.57wtq (blown seals)
Chinese 16G @ 7psi: 180.62whp 193.6wtq (died at 5,000 rpms)
DSM T25 at 13 psi coming soon (third time's a charm, right?)
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Old 06-11-2007, 11:22 AM   #9
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I think if you're going to upgrade from a 2.25 you might aswell go 3" it won't hurt anything just be a little louder.
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Old 06-11-2007, 12:17 PM   #10
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I had actually planned on it. If I couldn't keep my FS 2.25" exhaust I was going to go 3" just because I plan to upgrade the turbo setup later on down the road when money is less of an issue.
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00 ZX3 DD now with over 100K miles
Old turbo: 14b @ 9ish psi: 182.93whp, 188.57wtq (blown seals)
Chinese 16G @ 7psi: 180.62whp 193.6wtq (died at 5,000 rpms)
DSM T25 at 13 psi coming soon (third time's a charm, right?)
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