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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Fuel Pressures and Injectors
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Thu, 24 November 2005 06:50
 
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| mic* wrote on Thu, 24 November 2005 16:19 |
Corollas, unless you have a RRFPR how does boost affect the pressure of the system? I guess the 2J has one stock? How did you calculate 4.2 bar or did you get this figure from spec on the factory FPR?
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normal pressure reference fuel pressure regulators will increase fuel pressure as a 1:1 ratio of the reference pressure.
rising rate fuel pressure regulators are called that because the rate at which the fuel pressure increases is greater than the boost reference pressure, ie 1.5:1, 2:1 etc.
a RRFPR increases fuel faster, and you run into fuel pump problems sooner. since injectors are designed for a certain range of pressure, you should keep the pressure differential across them close to their design.
a higher differential, as with RRFPR, gives higher flow for same PW.. to a point.. and the only time they are warranted is when you are trying to richen the fuel curve of a stock setup using stock ECU which has MAP sensor, after you decrease intake flow path resistance....
or so i think  .... in all other situations, you are better off using a 1:1 FPR so that you always have the same pressure differential across the injector, and then you have a better idea of what a given increase in PW will do to fuel flow..
maybe
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| | Subject | Poster | Date |
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Fuel Pressures and Injectors
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Viper_III | Tue, 22 November 2005 05:11 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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Viper_III | Wed, 23 November 2005 01:12 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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Skip | Wed, 23 November 2005 01:48 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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Viper_III | Wed, 23 November 2005 02:15 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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STR8 2.8 | Wed, 23 November 2005 02:37 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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Viper_III | Wed, 23 November 2005 04:29 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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Viper_III | Wed, 23 November 2005 21:46 |
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Re: 2JZ Fuel Pressures/ g.min to cc conversion
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oldcorollas | Thu, 24 November 2005 03:43 |
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Re: Fuel Pressures and Injectors
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mic* | Thu, 24 November 2005 05:19 |
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Re: Fuel Pressures and Injectors
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oldcorollas | Thu, 24 November 2005 06:50 |
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Re: Fuel Pressures and Injectors
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oldcorollas | Thu, 24 November 2005 06:53 |
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Re: Fuel Pressures and Injectors
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oldcorollas | Thu, 24 November 2005 06:59 |
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Re: Fuel Pressures and Injectors
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mic* | Thu, 24 November 2005 06:59 |
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Re: Fuel Pressures and Injectors
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mic* | Thu, 24 November 2005 05:21 |
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Re: Fuel Pressures and Injectors
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oldcorollas | Thu, 24 November 2005 06:14 |
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Re: Fuel Pressures and Injectors
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mic* | Thu, 24 November 2005 06:47 |
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Re: Fuel Pressures and Injectors
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mic* | Thu, 24 November 2005 07:00 |
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Re: Fuel Pressures and Injectors
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oldcorollas | Thu, 24 November 2005 07:20 |
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Re: Fuel Pressures and Injectors
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Viper_III | Thu, 24 November 2005 07:22 |
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Re: Fuel Pressures and Injectors
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Viper_III | Thu, 24 November 2005 22:47 |
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Re: Fuel Pressures and Injectors
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mic* | Fri, 25 November 2005 03:38 |
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Re: Fuel Pressures and Injectors
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Viper_III | Fri, 25 November 2005 03:43 |
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Re: Fuel Pressures and Injectors
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mic* | Fri, 25 November 2005 04:00 |
