appropriate fuel pressure?
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From: Los Gatos, CA
appropriate fuel pressure?
I run an apexi rx6 single with 550/1300 injectors.
Was wondering what you guys think the fuel pressure should be at WOT?
After reading a couple dozen posts from a search, I'm not getting an answer.
TIA
Fabian
Was wondering what you guys think the fuel pressure should be at WOT?
After reading a couple dozen posts from a search, I'm not getting an answer.
TIA
Fabian
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Joined: Jul 2001
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From: Where there's only two seasons, hot and wet! I love Okinawa
Re: appropriate fuel pressure?
Originally posted by foko
I run an apexi rx6 single with 550/1300 injectors.
Was wondering what you guys think the fuel pressure should be at WOT?
After reading a couple dozen posts from a search, I'm not getting an answer.
TIA
Fabian
I run an apexi rx6 single with 550/1300 injectors.
Was wondering what you guys think the fuel pressure should be at WOT?
After reading a couple dozen posts from a search, I'm not getting an answer.
TIA
Fabian
03 Cobra Killer
Joined: Jan 2002
Posts: 1,423
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From: All Over
29psi sounds low. I can't monitor my fuel pressure at the present while @ WOT since the gauge is in the engine bay...
But my base fuel pressure is set to ~40psi. With a 1:1 rrfpr, you should get 1 additional psi of fuel pressure with each psi of boost above the base (idle) fuel pressure, hence the 1:1 (rrfpr = Rising Rate Fuel Pressure Regulator).
K
But my base fuel pressure is set to ~40psi. With a 1:1 rrfpr, you should get 1 additional psi of fuel pressure with each psi of boost above the base (idle) fuel pressure, hence the 1:1 (rrfpr = Rising Rate Fuel Pressure Regulator).K
Senior Member
Joined: Mar 2001
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From: Jax, Fl.
Ideally what you want is about 75PSI MAX at the highest boost that you will ever run.
Some people run higher, but it taxes the pump.
And Nocab. No offense, but 1:1 isn't considered Rising Rate. That's a straight linear rate. Rising rate increases rail pressure exponentially compared to a linear rise in manifold pressure (boost). Therefore rising rate regulators can't be measured with a fixed ratio.
Some people run higher, but it taxes the pump.
And Nocab. No offense, but 1:1 isn't considered Rising Rate. That's a straight linear rate. Rising rate increases rail pressure exponentially compared to a linear rise in manifold pressure (boost). Therefore rising rate regulators can't be measured with a fixed ratio.
03 Cobra Killer
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From: All Over
Oops, thanks for the correction es. No offense taken, been hanging around my turbo honda friends too much...they all DO use rrfpr's 
I figured you could call any FPR that raised full pressure in any ratio to boost pressure a rising rate FPR.
I figured you could call any FPR that raised full pressure in any ratio to boost pressure a rising rate FPR.
Last edited by nocab72; Oct 3, 2002 at 09:57 AM.
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Joined: Mar 2001
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From: Jax, Fl.
Originally posted by nocab72
Oops, thanks for the correction es. No offense taken, been hanging around my turbo honda friends too much...they all DO use rrfpr's
I figured you could call any FPR that raised full pressure in any ratio to boost pressure a rising rate FPR.
Oops, thanks for the correction es. No offense taken, been hanging around my turbo honda friends too much...they all DO use rrfpr's
I figured you could call any FPR that raised full pressure in any ratio to boost pressure a rising rate FPR.
J/K
03 Cobra Killer
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From: All Over
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03 Cobra Killer
Joined: Jan 2002
Posts: 1,423
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From: All Over
I knew you were joking... hence the
I do like to roll up in my car, NOT pop the hood and let ppl think I'm a ricer... For some of the smarter ones the FMIC blows my cover... If it didn't have so many bent fins I could tell them it was fake.... hahaha
K
I do like to roll up in my car, NOT pop the hood and let ppl think I'm a ricer... For some of the smarter ones the FMIC blows my cover... If it didn't have so many bent fins I could tell them it was fake.... hahaha
K
Originally posted by nocab72
29psi sounds low. I can't monitor my fuel pressure at the present while @ WOT since the gauge is in the engine bay... But my base fuel pressure is set to ~40psi. With a 1:1 rrfpr, you should get 1 additional psi of fuel pressure with each psi of boost above the base (idle) fuel pressure, hence the 1:1 (rrfpr = Rising Rate Fuel Pressure Regulator).
K
29psi sounds low. I can't monitor my fuel pressure at the present while @ WOT since the gauge is in the engine bay...
But my base fuel pressure is set to ~40psi. With a 1:1 rrfpr, you should get 1 additional psi of fuel pressure with each psi of boost above the base (idle) fuel pressure, hence the 1:1 (rrfpr = Rising Rate Fuel Pressure Regulator).K
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