Exhaust diameter?

hooey_b · 04-30-2016, 06:03 PM

I've been wondering, what is the best sized diameter exhaust to have for a vq37vhr? I've got some janky ish going on underneath with a "custom" single piece catback and some bolt ons, but have been...apprehensive on pullling the trigger on an exhaust.

I'd like to know the best size, 3" or 2.75"? I'm currently NA going flex, then boost.

Chuck33079 · 04-30-2016, 06:14 PM

3 for boost, but it's too big for NA.

roplusbee · 05-01-2016, 01:35 AM

I agree with Chuck. Go with 2.5" for NA.

2011 Nismo#91 · 05-02-2016, 11:30 AM

If your end goal is without a doubt boost, get the 3" it won't hurt an NA setup, but won't give anymore benefit then a 2.5, and you won't be restricted when you decide to boost.

EzDz · 05-02-2016, 11:54 AM

Quote:

Originally Posted by hooey_b

I've been wondering, what is the best sized diameter exhaust to have for a vq37vhr? I've got some janky ish going on underneath with a "custom" single piece catback and some bolt ons, but have been...apprehensive on pullling the trigger on an exhaust.

I'd like to know the best size, 3" or 2.75"? I'm currently NA going flex, then boost.

if you are doing a y pipe into a single do 3" for na

hooey_b · 05-02-2016, 07:49 PM

it's all in prep for boost down the road...so looks like 3" it is.

I'll just keep the Stillen HFCs on, they should leave enough of a choke for appropriate backpressure

04-30-2016, 06:03 PM	#1 (permalink)
hooey_b Base Member Join Date: May 2015 Location: Atlanta Posts: 126 Drives: 2008 G37S 6MT Rep Power: 10	Exhaust diameter? I've been wondering, what is the best sized diameter exhaust to have for a vq37vhr? I've got some janky ish going on underneath with a "custom" single piece catback and some bolt ons, but have been...apprehensive on pullling the trigger on an exhaust. I'd like to know the best size, 3" or 2.75"? I'm currently NA going flex, then boost.

04-30-2016, 06:14 PM	#2 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	3 for boost, but it's too big for NA. jchammond likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

05-01-2016, 01:35 AM	#3 (permalink)
roplusbee A True Z Fanatic Join Date: Dec 2009 Location: Killeen, TX Posts: 2,360 Drives: 2007 350Z NISMO Rep Power: 22	I agree with Chuck. Go with 2.5" for NA. jchammond likes this. __________________ 2007 350Z NISMO #0618: Zerolift \| UPREV \| F.I. \| Greddy \| Competition Clutch \| Injector Dynamics \| Aeromotive \| Pioneer \| JL

05-02-2016, 11:30 AM	#4 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,400 Drives: slowly Rep Power: 40569	If your end goal is without a doubt boost, get the 3" it won't hurt an NA setup, but won't give anymore benefit then a 2.5, and you won't be restricted when you decide to boost. TechnicZ likes this.

05-02-2016, 07:49 PM	#6 (permalink)
hooey_b Base Member Join Date: May 2015 Location: Atlanta Posts: 126 Drives: 2008 G37S 6MT Rep Power: 10	it's all in prep for boost down the road...so looks like 3" it is. I'll just keep the Stillen HFCs on, they should leave enough of a choke for appropriate backpressure TechnicZ likes this.

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