09 Nismo Z exhaust project

Chuck33079 · 02-14-2014, 08:26 AM

I must have read that wrong. There's no final numbers and several people in that thread are pointing out that 3" may not be ideal. Do the math. Look at the link I posted. Look at the right hand column in that chart attached to it. Double the area of the 2.5" and then subtract the area of the 3" pipe. That's the reduction in area of the single 3". In order for your project to work as planned, you should really run a 3.5".

It's your car, but get a baseline on a dyno beforehand with the hfcs already installed. That way it'll be easy to see if you've improved things or made them worse.

Fulljim · 02-14-2014, 10:01 AM

Amuse R1000, 3in tubing, 15hp gain ....

Megan370z · 02-14-2014, 10:20 AM

Quote:

Originally Posted by Fulljim

Amuse R1000, 3in tubing, 15hp gain ....

the problem with the OEM exhaust is mostly the Y-Pipe which restrict a LOT since the exit of the y-pipe isnt 3'' if I remember correctly ( I will have to mesure mine after work and provide with a true mesurement)

that Amuse single in 3'' will provide more flow than the OEM Y-pipe which also give more power.. but the VHR can flow a lot more than a 3'' single.

remember that 15hp you are talking about with the Amuse R1000
its basicaly the same with the Fast Intension cat-back

Chuck33079 · 02-14-2014, 10:23 AM

Quote:

Originally Posted by Megan370z

the problem with the OEM exhaust is mostly the Y-Pipe which restrict a LOT since the exit of the y-pipe isnt 3'' if I remember correctly ( I will have to mesure mine after work and provide with a true mesurement)

that Amuse single in 3'' will provide more flow than the OEM Y-pipe which also give more power.. but the VHR can flow a lot more than a 3'' single.

remember that 15hp you are talking about with the Amuse R1000
its basicaly the same with the Fast Intension cat-back

We're basically talking to the wall, man.

jwick · 02-14-2014, 10:52 AM

Quote:

Originally Posted by Megan370z

the problem with the OEM exhaust is mostly the Y-Pipe which restrict a LOT since the exit of the y-pipe isnt 3'' if I remember correctly ( I will have to mesure mine after work and provide with a true mesurement)

that Amuse single in 3'' will provide more flow than the OEM Y-pipe which also give more power.. but the VHR can flow a lot more than a 3'' single.

remember that 15hp you are talking about with the Amuse R1000
its basicaly the same with the Fast Intension cat-back

It's 2.5" O.D. but with thin wall pipe I.D. and O.D. are pretty close

Megan370z · 02-14-2014, 11:24 AM

Quote:

Originally Posted by jwick

It's 2.5" O.D. but with thin wall pipe I.D. and O.D. are pretty close

you close but not quite.

OEM Y-pipe exit spec is as follow ; avg 2.5'' OD and 2.350'' ID ,, its a double wall exit (inner sleeve)

jwick · 02-14-2014, 04:12 PM

Quote:

Originally Posted by Megan370z

you close but not quite.

OEM Y-pipe exit spec is as follow ; avg 2.5'' OD and 2.350'' ID ,, its a double wall exit (inner sleeve)

My caliper said I.D. was 2.4"ish

Megan370z · 02-14-2014, 04:32 PM

Quote:

Originally Posted by jwick

My caliper said I.D. was 2.4"ish

how about those then.
they are in lock mode at 2 different axis .

edit; we don't have the same y-pipe. do we?

02-14-2014, 08:26 AM	#1 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29540	I must have read that wrong. There's no final numbers and several people in that thread are pointing out that 3" may not be ideal. Do the math. Look at the link I posted. Look at the right hand column in that chart attached to it. Double the area of the 2.5" and then subtract the area of the 3" pipe. That's the reduction in area of the single 3". In order for your project to work as planned, you should really run a 3.5". It's your car, but get a baseline on a dyno beforehand with the hfcs already installed. That way it'll be easy to see if you've improved things or made them worse. Dzel likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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02-14-2014, 10:01 AM	#2 (permalink)
Fulljim Base Member Join Date: Mar 2013 Location: Qc, Canada Posts: 44 Drives: 09 Nismo 370Z Rep Power: 14	Amuse R1000, 3in tubing, 15hp gain ....