setting fuel pressure
#433083
September 21, 2014 01:41 am UTC
September 21, 2014 01:41 am UTC
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Posts: 290 Brantford
scot mitton
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Hello Past little while iv been working on a formula libre race car for a guy. Car makes 200ish hp its a stock ford DOHC 2.0L focus motor in it.
Has 220cc injectors a areomotive FPR and a walbro inline 255 pump. saw his fuel pressure was set to 84psi!
I know a stock focus system runs 45PSI
now my car fully built evo 3 street tune makes 419whp I have a walbro 255 and 1000cc injectors and FPR set to 42psi.
what i dont seem to understand is how do you pick what your PSI should be set to on the FPR ... or the LPH that you need ..
could some one please clear this up for me ..
thank you
"FABzilla MotorSports" custom welding & fabrication on Facebook click "like" 92 Evo GSR
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Re: setting fuel pressure
[Re: scot mitton]
#433084
September 21, 2014 02:17 am UTC
September 21, 2014 02:17 am UTC
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Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
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Senior Member, with Far TOO Much Time on Their Hands
Joined: Jan 2000
Posts: 7,503
Trenton, On, Canada.
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Wish I could help better but your text gets me confused... Past little while iv been working on a formula libre race car for a guy. Car makes 200ish hp its a stock ford DOHC 2.0L focus motor in it...Has 220cc injectors a areomotive FPR and a walbro inline 255 pump. saw his fuel pressure was set to 84psi!
I know a stock focus system runs 45PSI Is that car modified??? Was this vehicle modified with some kind of forced induction (power adder)??? What is "libre" means??? Ghislain
Last edited by Ghislain Goudreau; September 21, 2014 02:20 am UTC.
Rouge!!!
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Re: setting fuel pressure
[Re: scot mitton]
#433085
September 21, 2014 02:18 am UTC
September 21, 2014 02:18 am UTC
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Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
Senior Member, with Far TOO Much Time on Their Hands
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Senior Member, with Far TOO Much Time on Their Hands
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Trenton, On, Canada.
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.
Last edited by Ghislain Goudreau; September 21, 2014 02:18 am UTC.
Rouge!!!
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Re: setting fuel pressure
[Re: Rob Strelecki]
#433087
September 21, 2014 02:46 am UTC
September 21, 2014 02:46 am UTC
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Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
Senior Member, with Far TOO Much Time on Their Hands
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Senior Member, with Far TOO Much Time on Their Hands
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Trenton, On, Canada.
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Seems like that would be a tall order to control, does it idle like sh!t? Hence my WTF??? Ghislain
Rouge!!!
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Re: setting fuel pressure
[Re: Ghislain Goudreau]
#433094
September 21, 2014 02:30 pm UTC
September 21, 2014 02:30 pm UTC
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Joined: Jun 2007
Posts: 290 Brantford
scot mitton
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[/quote]
Is that car modified??? Was this vehicle modified with some kind of forced induction (power adder)???
What is "libre" means???
Ghislain
the car has Individual throttle bodys and tube exhaust, runs full standalone. its still NA formula Libre is a class of race cars where any thing goes pretty much .. car we are running is a British F2000 formula ford looks like a small indy car. car idles not to bad, but cracks and pops when you rev it up
Last edited by scot mitton; September 21, 2014 02:32 pm UTC.
"FABzilla MotorSports" custom welding & fabrication on Facebook click "like" 92 Evo GSR
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Re: setting fuel pressure
[Re: scot mitton]
#433103
September 21, 2014 04:23 pm UTC
September 21, 2014 04:23 pm UTC
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Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
Senior Member, with Far TOO Much Time on Their Hands
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Senior Member, with Far TOO Much Time on Their Hands
Joined: Jan 2000
Posts: 7,503
Trenton, On, Canada.
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Most Fuel Pump have a Pressure Relief Valve that opens when Fuel Pressure is above a certain amount. Walbro 255's Relief Valve normally open around 75 psi.
As stated above I would suggest running larger Injectors and reducing the Fuel Pressure.
Ghilsain
Last edited by Ghislain Goudreau; September 21, 2014 04:24 pm UTC.
Rouge!!!
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Re: setting fuel pressure
[Re: scot mitton]
#433109
September 21, 2014 05:29 pm UTC
September 21, 2014 05:29 pm UTC
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Joined: Jun 2007
Posts: 290 Brantford
scot mitton
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Rob .. the goal is to at some point turbo it .. from what i read that motor can handle 350hp boosted.
Ghislain .. thats what i had suggested aswell to run larger injectors and get the fuel pressure around 40-50psi
the walbros he keeps putting in are blowing after a few races i assumed its due to the high pressure .
"FABzilla MotorSports" custom welding & fabrication on Facebook click "like" 92 Evo GSR
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Re: setting fuel pressure
[Re: scot mitton]
#433118
September 21, 2014 11:32 pm UTC
September 21, 2014 11:32 pm UTC
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Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
Senior Member, with Far TOO Much Time on Their Hands
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Senior Member, with Far TOO Much Time on Their Hands
Joined: Jan 2000
Posts: 7,503
Trenton, On, Canada.
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the walbros he keeps putting in are blowing after a few races i assumed its due to the high pressure.
Rouge!!!
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