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| gryph |
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I have a 2.5 inch system currently on my car was wondering if i put in another 2.5 inch pipe will that free turbo backpressure or will i have to upgrade to a 3"???
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| ebs_4l |
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you means twin 2.5s???
if so, then remember the cross section of twin 2.25's is equivalent to nearly 3.5inches. 3in has less flow ability than twin 2.25's... so i imagine twin 2.5s would flow really well
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| gryph |
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Ta thats what i figured but thought id ask to be sure
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| ebs_4l |
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just fired up the calculator, it tells me that cross section of twin 2.5s is bigger than single 3.5in
63cm2 vs 61cm2
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
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| CHEF |
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I was gonna do this to mine... grab another 2.5in cheapo lukey cat back and mount it next to the existing lukey pipe... would be a cheap alternative to changing to a whole new 3.5in system, and more flow to boot
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