3inch single exit exhaust too big for N/A

blacknismoZ

Anyone has this set up? Im planning to do 3inch single or 2.5 single exit? anyone has dyno chart with 3 inch single?

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HKS filter, DBA 5000/4000, HPS, Stoptech. bone stock dyno at Surgeline tuning 294whp 251tq.

98intrigue

It won't be a problem... Depending on a few things, I'll be running FI LTHs with my 3" single exhaust with a HKS Hi-Power muffler.

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blacknismoZ

Thanks, I notice on your pic your single is on the driver side. any reason why? Im planing doing mine on right

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HKS filter, DBA 5000/4000, HPS, Stoptech. bone stock dyno at Surgeline tuning 294whp 251tq.

98intrigue

No particular reason...that's just the way the piping was ran.

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Footloose301

No more turbo?

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2010 40th Anniversary 370Z

NYBladeZ

Wow FI LTH plus 3" single HKS exhaust? Must be loud as hell and you have the power to back up the screeeeaaam.

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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

fuct

wouldn't it flow better through two separate exhausts than routed into one?

blacknismoZ

Most JDM exhaust like Amuse used 3 inch mid pipe then connect to 2 canister.

370ZTUNE.com

im guessing same flow but lighter. I just want lighter exhaust without going TI.

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HKS filter, DBA 5000/4000, HPS, Stoptech. bone stock dyno at Surgeline tuning 294whp 251tq.

NYBladeZ

for a single turbo setup a large single exhaust is ideal of course you then need to either live with the extra bumper cutout or fill it somehow.

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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

awkwardturtle

I doubt it. To be honest, I keep wondering why every company keeps putting out the same 2.5" exhaust. It's almost as if people are afraid of 3" exhausts.

In the civic community (8thcivic), everyone ran 2.25-2.5" exhausts for years because of these claims that a 3" was 'too big'. Finally a company came out with a 3" and showed that it gained everywhere, with no losses, and now no one wants an exhaust that isn't a 3". I suspect the gains would be just as great (greater) here. I really don't get all of the FI guys who are running 2.5" DPs/exhausts. That one really boggles my mind.

edub370

dual 3" WILL lose you low end torque. back ressure creates torque. sure u might gain slight hp up top but the butt dyno will feel like there is less power because of the torque loss.

and before anyone asks "how do u know if a 3" will lose power? have u tried it?"... well no i havent, but i understand how cars work...


"Horsepower sells cars, torque wins races".

-Enzo Ferrari-

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awkwardturtle

You sound EXACTLY - like word for word - like everyone used to on the 8thcivic forums. "We need backpressure or we'll lose power down low". That was the mantra for at least 2-3 years. Everyone chanted it. One day a 3" comes out, proves every single person wrong.

Maybe you are right, maybe your'e wrong. Someone should actually test it before saying that, though, because everyone used to be like you until it was proven wrong.

@617DRFT_370z

Dont mean to sound like a jerk, but ur only partially correct. I made 330whp 270wtrq with my Amuse R1 Titan Extra. Swapped to Tomei Expreme Ti with same mods on car, made 330whp/270wtrq, same exact numbers. 270 peak trq @ 3000rpms and actually carries the trq curves higher and longer through the revs than the Amuse dual exhaust did. High revving cars dont want any back pressure, trq is measured on how fast exhaust gas leaves the cylinder, you want straight flow no back pressure or turbulence from flanges or bends. If anything, trq is sustained better through the revs and hp curve seemed to drop up top, but peak numbers were both same. Strange i know, EcuTek and DynoJet do not lie.

blacknismoZ

^ not sure if you're talking to me but i want single exit 3 inch exhaust.

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HKS filter, DBA 5000/4000, HPS, Stoptech. bone stock dyno at Surgeline tuning 294whp 251tq.

edub370

i was more responding to awkwardturtle above. comparing a single 2.25" to a single 3" doesnt mean it would work on duals.

i think a single 3" would work great on our cars tho. our engine would definately create enough exhuast gas take advantage of that type of setup

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