OK, I currently have straight-pipes on my car, but it is "stock". So from the turbo-back I have no cat or muffler but it is still a 2.25" diameter.
Now my question. Would I notice any gain besides sound in going to a 3" turbo-back straight pipe exhaust? Will increasing the diameter by .75" make a noticable performance difference?
I know people have a decent increase in going from stock to the 3" downpipe & 2.5" exhaust, but the only restriction I currently have might be the diameter.
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5 replies to this topic
#1
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Posted 04 November 2009 - 12:18 AM
1999 C70 2.4 LPT Convertible
19T, 3" turbo back exhaust, InMotion tune, fmic with 2.5" piping, ME7 NA intake manifold, snabb IM spacer, ebay BOV, catch can, japanifold exhaust, EBC, weitec lowering springs, euro plate, no cat, single dual output muffler, e-code headlights, dual transmission coolers, polyurethane mounts, front strut bar, Innovate wideband
#2
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Posted 04 November 2009 - 12:23 AM
more exhaust flow = more powa!
96 850R autotradgic. Custom TD04 Billet turbo. ST custom tune. OBX. Japanifold. AEM ebc. MSD. Kingsbourne Wires. IPD Intake Spacer and SR5T. Bilsteins. B&G Springs. Forge BOV.
98 S70 GLT.
98 S70 GLT.
#3
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Posted 04 November 2009 - 12:56 AM
Depends what turbo you're running. I don't think it'll make much of a difference if you're stock up front. Even with de-cat and downpipe, the turbo is normally the bottleneck.
I've got a 3" straight-through turboback system on the S70, with a GT3582R. It flows nicely. I had the 3" system with the 18T, and noticed a gain, but nothing HUGE over just the de-cat. (other than bending a rod on a boost spike :| )
I've got a 3" straight-through turboback system on the S70, with a GT3582R. It flows nicely. I had the 3" system with the 18T, and noticed a gain, but nothing HUGE over just the de-cat. (other than bending a rod on a boost spike :| )
#4
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Posted 04 November 2009 - 01:18 AM
hmm...
I have a 15G on it with the angle exhaust housing. I probably won't be going any larger than a 18T, or maybe a S60R turbo if i'm feely crazy. I don't want to kill the internals on my daily LPT.
I have a 15G on it with the angle exhaust housing. I probably won't be going any larger than a 18T, or maybe a S60R turbo if i'm feely crazy. I don't want to kill the internals on my daily LPT.
1999 C70 2.4 LPT Convertible
19T, 3" turbo back exhaust, InMotion tune, fmic with 2.5" piping, ME7 NA intake manifold, snabb IM spacer, ebay BOV, catch can, japanifold exhaust, EBC, weitec lowering springs, euro plate, no cat, single dual output muffler, e-code headlights, dual transmission coolers, polyurethane mounts, front strut bar, Innovate wideband
#5
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Computer Engineering at University of Florida. Dig it - Location:Florida(Jacksonville/Gainseville)
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Posted 04 November 2009 - 02:40 AM
3inch Turboback with all mandrel bends = the only way to go.
Now if only i could buy my OBX DP and afford 600$ for a shop to make a good system =p
Now if only i could buy my OBX DP and afford 600$ for a shop to make a good system =p
I live in Sunny Fl..Home of the beach!! (And Rust! )
1993 850 GLT - My Baby, Lanier
1996 850 R - My Love, Suwanee
VS for life
1993 850 GLT - My Baby, Lanier
1996 850 R - My Love, Suwanee
VS for life
#6
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Posted 04 November 2009 - 02:49 AM
most noticeable difference you will find is from a DP.
Ian Carr - 99' Volvo S70 T5M - 86' Porsche 944 Turbo - 07' Mazda 3
Because Race Car.
True CAI, Neptunes, XC bumper, iPd25mm rear sway, short shifter, front mount, ssqv, sweet license plate mounted in the engine bay, lowered, HD Endlinks.
Because Race Car.True CAI, Neptunes, XC bumper, iPd25mm rear sway, short shifter, front mount, ssqv, sweet license plate mounted in the engine bay, lowered, HD Endlinks.
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