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Stock 350z exhaust flow limit

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Old 07-28-2016, 09:03 PM
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Tanahara
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Default Stock 350z exhaust flow limit

With the smallest point being 2.25" would this limitation be causing me not to boost above 7 psi? I am using evc6 boost controller and even changing the coefficients I cannot get above 6-7 psi...

Last edited by Tanahara; 07-28-2016 at 09:04 PM.
Old 07-28-2016, 10:57 PM
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Unicus
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You're boosted with a full stock exhaust?...
Old 07-28-2016, 11:06 PM
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Tanahara
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Originally Posted by Unicus
You're boosted with a full stock exhaust?...
Yes it's my next projecto had to handle some qol fixes such as door motors, seat motors etc first.
Old 07-29-2016, 04:52 AM
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Unicus
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First off, I think it's smaller than 2.25, I'm pretty sure there are 2 or even 1.75 chokes in stock system. I hope the rest of your internals are upgraded? Else you're going to blow in weeks at best...

Just not looking good from the little info you've given, but I suggest putting some more time in before getting serious with running the car.

You have plenty of options, but the stock exhuast is a huge nono. It's horribly restrictive.
Old 07-29-2016, 05:30 AM
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iideadeyeii
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I've hit 10 psi with stock exhaust(resonator and muffler) so that shouldn't be a problem unless you are still running cats then I don't think anyone can answer your question
Old 07-29-2016, 05:31 AM
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NiLL
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When you can buy an E-bay exhaust way bigger than stock for 300 new, I don't get why you don't have something already.

If 300 is to rich for your blood you might wanna trade your turbo car for a non-turbo one.
Old 07-29-2016, 05:36 AM
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Tanahara
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Still running cats as well soon to go away along with stock exhaust. Unicus, I have a stage 2 motor with upgraded pistons ,rods everything. Nill 300 is not anything lol I have been researching what's the best for what I want out of the car hp wise andecision rather to do it myself or let exhaust shop handle it.
Old 07-29-2016, 05:42 AM
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iideadeyeii
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Originally Posted by Tanahara
I have been researching what's the best for what I want out of the car hp wise
Open dumps
Old 07-29-2016, 05:53 AM
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Tanahara
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Originally Posted by iideadeyeii
Open dumps
I understand some like to dump in the open but more private
Old 07-29-2016, 07:20 AM
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Unicus
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Resonated true duals with ART pipes or HFC's will most likely meet what you're looking for. You need to get off of stock cats and muffler ASAP.

What are your emissions like?
Old 07-29-2016, 11:05 AM
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Sleepiedaze
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Originally Posted by Tanahara
Still running cats as well soon to go away along with stock exhaust. Unicus, I have a stage 2 motor with upgraded pistons ,rods everything. Nill 300 is not anything lol I have been researching what's the best for what I want out of the car hp wise andecision rather to do it myself or let exhaust shop handle it.

what the **** is a stage 2 motor. also peak boost hitting at 7 psi your waste gate could be set to open at 7psi manually.
Old 07-29-2016, 12:11 PM
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Unicus
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Originally Posted by Sleepiedaze
what the **** is a stage 2 motor. also peak boost hitting at 7 psi your waste gate could be set to open at 7psi manually.
I imagine he got a stage 2 rebuild from z1 or the like.
Old 07-29-2016, 01:12 PM
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rearranged
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Originally Posted by Sleepiedaze
what the **** is a stage 2 motor.
stage 2 short block

stage 2 long block

Last edited by rearranged; 07-29-2016 at 01:15 PM.
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