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Location:
Perth
Registered:
October 2003
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1JZ Fuel System Q's
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Tue, 14 October 2003 05:00
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Hi
Im doing a 1JZ conversion and just wanted to clear a few things up:
1. Does the fuel supply go into the pulse thingy at the rear of the engine?
2. Is that a rising rate regulator that sits on the front of the fuel rail, and will it still be suitable for my Bosch 044 pump and Haltech management? Does anyone know what it's base pressure is set at?
Cheers 
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Location:
Brisbane
Registered:
May 2002
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 05:12
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1. There is a pulsation damper on the end of the fuel rail, if that's what you mean.
2. There is a fuel pressure regulator on the other end of the fuel rail, but it's not a rising rate fuel pressure regulator. It will work with any EFI pump, provided it flows enough to suit your horsepower requirements of course. Base pressure should be somewhere around 35psi.
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 07:42
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Norbie: What does the vacuum/pressure line on the regulator that pulgs into the inlet manifold do then?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 08:42
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i would guess it is a standard vacuum referenced fuel pressure regulator..
you only really need rising rate when you are trying to use a stock computer to do what it is not meant to.
if you went to an aftermarket computer, you would not use a rising rate reg.
Cya, Stewart
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 12:46
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Riddle me this Robin? Question for all the experts, if that funny little bellows on the end of the fuel rail does not increase rail pressure, then could someone please explain to me why --- my fuel pressure rises, with a rise in boost?. Checked with a fuel pressure guage teed into the fuel feed line. Stock computer, and a fuel pump, totally independent of the computer.
regards Chuck.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
perth WA
Registered:
January 2003
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 13:55
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whats this 1jz going into .. yes bosch 044 will support about 6-700hp .. haltech has no control over your fuel pressure
is this car previously efi ?? or u convert it to efi ..eg surge tank or baffles in the tank
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Location:
Perth
Registered:
October 2003
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Re: 1JZ Fuel System Q's
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Tue, 14 October 2003 22:27
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Thanks for the help guys, but still no one has properly answered whether or not the fuel supply goes into the pulsation damper?
slylux: The 1JZ is going into a Landcruiser LJ71G, it's a Japanese import version of Australia's Bundera. I realise the Haltech does not control the fuel pressure, just giving a bit of info on my setup thats all. The car was a 2.4 turbo diesel, so yes I made an 8 litre aluminium surge tank mounted next to my transfer case. It is supplied by a 100L/hr @ 4 psi pump. Surge has 8mm supply line and 6mm return back to the tank. Supply and return from the fuel rail to the surge are 8mm.
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