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#1
17-02-2013, 10:25 AM
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2.5 or 3 inch exhaust
Hi I'm crunntly running a 3inch down pipe with 2.5 type r centre and a 2.5 inch back the car is stage one and made 328bhp on dyno but inlet temp were playing up so wound it back to 316 to be safe I now fitting a fmic and pressure reg so the question is will the 2.5 be ok or restrictive will I be better of with a 3inch ?
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#3
17-02-2013, 11:41 AM
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As above, depends how far you plan to go, does the downpipe narrow to 2.5 at the exit to mate to the std system? If so it'll be a custom job or new downpipe.
__________________
2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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#4
17-02-2013, 12:44 PM
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Planing for 350-360 I'm that region, yes it narrows done to the standard system but I'd change it all for a true 3inch if its going to benefit,
So I should be ok with the 2.5 ?
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#6
17-02-2013, 06:42 PM
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Dose any one no if the the type r centre pipe is a restriction as it has 2 resonators one is big like a muffler the other is like a tube ?
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#7
17-02-2013, 08:20 PM
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Quote:
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#8
18-02-2013, 01:36 AM
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As above 2.5" will be OK up to 400bhp,some people running them up to 450-500bhp without the slight issue
Jura
__________________
Proud owner of SBR 2.35L JDM Bugeye WRX Wagon built by Neil@Slowboy Racing and mapped by Simon@JGM
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