10psi safe or not safe?

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TougeChallenger
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Joined: Sat May 21, 2005 6:10 am
Car: 91 240SX
Location: NH

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will my SR be safe running 10psi with the GT2871R on stock HG and injectors?


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wildacexxx
Posts: 500
Joined: Thu Jan 13, 2005 6:17 pm
Car: 2002 Q45 nav sport

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u should really upgrade the injectors at least. if u had money for a gt2871r u should fork over sum more for injectors

Kenrik
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Car: Nissan 240SX Coupe
Infiniti G35 Coupe
Nissan Versa Hatch

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No... that turbo flows better then the stock T25.. at 10PSI you will be lean without injectors/Safc

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TougeChallenger
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Joined: Sat May 21, 2005 6:10 am
Car: 91 240SX
Location: NH

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Ya i kinda thought that i do have a AFC but the displace doesnt work on it, so thats no good. But what if i run the stock T25 acuator at 7 psi i should be fine with that right?

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highmilehatch
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Joined: Wed Mar 17, 2004 7:16 am

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No. You won't be fine. Don't risk leaning out. Do you mean the display doesn't work on it? Pick up a set of Deatschwerks 550cc injectors and Power FC. How far are you from PA?

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S13FASTBACKSR
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Car: '92 Fastback SR powered

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yes definately upgrade the injectors. That turbo needs more fuel than what 4 370's can dish out. you will definately lean out. but once you upgrade the injectors you'll be fine at 10psi. the stock HG will be fine at 10psi as well

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TougeChallenger
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Car: 91 240SX
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i meant i should be fine at 7psi with stock injectors?

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xero1
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Car: 08 Altima Coupe

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is 10 psi safe on a s15 t28 turbo with stock injectors?

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S13FASTBACKSR
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Car: '92 Fastback SR powered

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No this also is not safe. the s15 t28 which obviously came factory on s15 sr's uses 480cc injectors. So using this turbo with your 370's is robbing the turbo of the fuel it desires which in turn means you will be leaning out. No its not safe

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highmilehatch
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Just bite the bullet and buy injectors and management. Your engine will thank you.

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S2R4200_ONEVIA
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Car: 1990 Nissan 240sx

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Ya either way if you upgrade turbo you will need upgraded injectors

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DRIFTINIZ
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Joined: Sat Dec 31, 2005 11:30 am

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can you turn up the boost to 10psi on the stock t25 w/stock injectors without leaning out???

DrifterProdigy85
Posts: 1817
Joined: Sat Jul 02, 2005 7:42 pm
Car: 1989 Nissan 240sx (Zenki Onevia)

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i ran 15psi on the stock injectors and T25. just be sure to have a Walbro Fuel Pump. Youll have the MAF maxed out at this point though.

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S13FASTBACKSR
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Joined: Sun Nov 27, 2005 10:28 am
Car: '92 Fastback SR powered

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yes 10 psi is safe on the stock injectors and T25. I believe the limit for the t25 though is 15psi. and as far as having the stock maf maxed out, it will max out at 280hp

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DRIFTINIZ
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Joined: Sat Dec 31, 2005 11:30 am

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so even though you'll be forcing in more air w/a higher psi level.....it won't lean out??? for example running 10-12 psi w/the stock turbo and fuel injection

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highmilehatch
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DRIFTINIZ wrote:so even though you'll be forcing in more air w/a higher psi level.....it won't lean out??? for example running 10-12 psi w/the stock turbo and fuel injection
Just becuase your running more boost DOES NOT MEAN you are getting more air into the engine. An engine doesn't know what boost is. It's just a number. 10 psi on a larger turbo will flow the same amount of cfm (air) as 20 psi on a smaller turbo. It's all attributed to turbo size. In simplest terms, a 2871R is a larger turbo, flows more cfm, requiring more fuel at the same boost level as the T-25.

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S2R4200_ONEVIA
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highmilehatch wrote:Just becuase your running more boost DOES NOT MEAN you are getting more air into the engine. An engine doesn't know what boost is. It's just a number. 10 psi on a larger turbo will flow the same amount of cfm (air) as 20 psi on a smaller turbo. It's all attributed to turbo size. In simplest terms, a 2871R is a larger turbo, flows more cfm, requiring more fuel at the same boost level as the T-25.
Very well said


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