pressure riser

jacktam1 · 05-02-2001, 01:16 AM

i'm getting vortech FPR from JCSport,who has the Pressure riser with MY00+, useful?and what's your setting?
Thanks

[This message has been edited by jacktam1 (edited May 02, 2001).]

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jacktam1 · 05-02-2001, 05:02 PM

bump..anyone?

Matt Monson · 05-02-2001, 05:07 PM

This has been hotly debated in the past( search archives). But my general take on it is on a car that already runs rich with mods, what's the point? Unless you get a rising rate one that kicks in above 4500 rpm where the MY00+'s(at least some of them, this has been hotly debated as well) lean out a bit.

blaster88 · 05-02-2001, 07:03 PM

Not sure of what use this would be on an NA car.

The Vortech FMU, from the Vortech website, "Increases fuel pressure in proportion to boost pressure." It has a hose that connects to manifold pressure, and when it sees positive pressure, it increases the fuel pressure at a fixed proportion (if you got it from JCS it is probably a 4:1) to boost. Installed in an NA car, it won't do anything.

jacktam1 · 05-02-2001, 07:49 PM

OIC..so that one is non-adjustable?and 4:1 boost=how much psi?

blaster88 · 05-02-2001, 07:52 PM

I think it is 1 psi boost = 4 lbs fuel pressure. So at 5lbs of boost, you get an additional 20 psi of fuel pressure.

Someone will correct me if I am wrong, I am sure.

05-02-2001, 01:16 AM	#1
jacktam1 Scooby Specialist Member#: 1783 Join Date: Jul 2000 Location: Richmond,BC,Canada Vehicle: 2000 2.5RS silver	pressure riser i'm getting vortech FPR from JCSport,who has the Pressure riser with MY00+, useful?and what's your setting? Thanks [This message has been edited by jacktam1 (edited May 02, 2001).] * Registered users of the site do not see these ads.

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05-02-2001, 05:02 PM	#2
jacktam1 Scooby Specialist Member#: 1783 Join Date: Jul 2000 Location: Richmond,BC,Canada Vehicle: 2000 2.5RS silver	bump..anyone?

05-02-2001, 05:07 PM	#3
Matt Monson Scooby Guru Member#: 832 Join Date: Jan 2000 Chapter/Region: RMIC Location: Teh Ghetto Garage, CO Vehicle: 99 2.5RS, '85 911 '73 914 and 2012 BRZ	This has been hotly debated in the past( search archives). But my general take on it is on a car that already runs rich with mods, what's the point? Unless you get a rising rate one that kicks in above 4500 rpm where the MY00+'s(at least some of them, this has been hotly debated as well) lean out a bit.

05-02-2001, 07:03 PM	#4
blaster88 Scooby Specialist Member#: 1109 Join Date: Mar 2000 Chapter/Region: MAIC Location: Reston, VA Vehicle: 1999 Suzuki Samurai Blackish	Not sure of what use this would be on an NA car. The Vortech FMU, from the Vortech website, "Increases fuel pressure in proportion to boost pressure." It has a hose that connects to manifold pressure, and when it sees positive pressure, it increases the fuel pressure at a fixed proportion (if you got it from JCS it is probably a 4:1) to boost. Installed in an NA car, it won't do anything.

05-02-2001, 07:49 PM	#5
jacktam1 Scooby Specialist Member#: 1783 Join Date: Jul 2000 Location: Richmond,BC,Canada Vehicle: 2000 2.5RS silver	OIC..so that one is non-adjustable?and 4:1 boost=how much psi?

05-02-2001, 07:52 PM	#6
blaster88 Scooby Specialist Member#: 1109 Join Date: Mar 2000 Chapter/Region: MAIC Location: Reston, VA Vehicle: 1999 Suzuki Samurai Blackish	I think it is 1 psi boost = 4 lbs fuel pressure. So at 5lbs of boost, you get an additional 20 psi of fuel pressure. Someone will correct me if I am wrong, I am sure.