03-05-2018, 07:19 AM
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#1 (permalink)
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A True Z Fanatic
Join Date: Aug 2012
Location: NW, AZ
Posts: 9,330
Drives: 10 Nissan 370z Nismo
Rep Power: 2684385
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Quote:
Originally Posted by SS_Firehawk
It's still hasn't been proven that the larger diameter intake pipes benefit the car. If it's not having breathing issues with 2.5", 2.75" will only reduce velocity. Also the filter design of the velocity stack upgrade is really beneficial pulling air in. It's hard to find side by side data against 2.5, 2.75, and 3".
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 LOL, it really isn't much different than what you see with the manifold that I wrongly spoke about. It is about air flow.....velocity and scavenging. It is the same reason there are no gains and possible loss of power with a 3" exhaust on a NA z. Bigger isn't always better!
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