Dunno what to tell you, the manual doesn't have that info. Doesn't the fuel pump put out a regular pressure? If so, the only other controlling factor would be the regulator, which is controlled via manifold vacuum. Pressure should raise as load increases and vacuum drops, so you should be able to get a max pressure reading (wide open regulator) with a gauge regardless of speed by manually modulating vacuum with a pump.
Dunno what to tell you, the manual doesn't have that info. Doesn't the fuel pump put out a regular pressure? If so, the only other controlling factor would be the regulator, which is controlled via manifold vacuum. Pressure should raise as load increases and vacuum drops, so you should be able to get a max pressure reading (wide open regulator) with a gauge regardless of speed by manually modulating vacuum with a pump.
efi pumps in general will put out between 15-80psi depending on application....
on most efi toyota systems, they will put out close to 70psi on returned systems..... however, they are regulated by the fuel pressure regulator which is vacuum/boost operated.... so they are a rising rate regulator......
you can't get the right pressure by revving the motor at wot when sitting in a driveway.... .the load condition are different than when under wot and driving.....
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1) 2004 IS300 Manual/LSD/Sportdesign 2) 2010 Corolla S 5 speed 3) 1986 MR2 "MK1.22" 5sfe/s54 swap 3) 1995 Ford Explorer 4x4, TT/AAL/custom shackle lift, 31"s
efi pumps in general will put out between 15-80psi depending on application....
on most efi toyota systems, they will put out close to 70psi on returned systems..... however, they are regulated by the fuel pressure regulator which is vacuum/boost operated.... so they are a rising rate regulator......
you can't get the right pressure by revving the motor at wot when sitting in a driveway.... .the load condition are different than when under wot and driving.....
Right, I never said anything about revving the engine in the driveway, I suggested manually modulating the pressure regulator via a hand pump to get max load (WOT) values.
And in my years of Toyota service, I've never found a fuel pressure reading of 70 psi to be normal. You'll find that most factory manuals specify a 40-50 psi range. But, I didn't start working on Toyotas 'til 2000, so maybe the older models are higher.
not sure if the 3sgte has a csi.... i would assume that the newer ones don't and just have the cold start sequence built into the computer rather than mechanical.....
i'm saying the pumps will put out that much..... but the regulator is what stops that sort of pressure being built in the rail
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1) 2004 IS300 Manual/LSD/Sportdesign 2) 2010 Corolla S 5 speed 3) 1986 MR2 "MK1.22" 5sfe/s54 swap 3) 1995 Ford Explorer 4x4, TT/AAL/custom shackle lift, 31"s
The cold start injector is mounted right after the throttle plate.
The 3sgte fpr is a rising rate (1:1 ratio) regulator as toyspeed mentioned. Fuel pressure will increase 1psi/ 1psi of boost.
If you are looking to increase injector size, I'd suggest also getting an rising rate afpr(aeromotive) w/ all the accompanying mods (ie rail, fp, ems) of course.
If there are 4 injectors then something is wrong. According to numerous injector size calculators, I would need somethign in the 700+ cc range to accomodate a 300whp setup, when I know that the stock injectors are good up to that much.
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