Boost Jet orifice size = how much boost

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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Sgt
Posts: 1227
Joined: Tue May 13, 2008 5:13 pm
Car: 1991 Fairlady Z (JDM) Twin Turbo

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Just wondering if anyone knows what orifice size will result in (on stock turbos):1) 14psi2) 13psi3) 12psi

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itsa300zx
Posts: 1287
Joined: Sun May 31, 2009 9:39 am
Car: 1990 300zx NA W/TT swap
2011 Nissan Rogue S
2008 Highlander SR5
Location: up North

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0.044" will give approx. 12-13 psi. Every engine will be slightly different. To be safe start with larger orfice and work down untill required max boost.
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