Fuel pressure at redline?
07-13-08, 09:13 PM
#1
Fuel pressure at redline?
Does any one know the fuel pressure PSI at redline with a 1:1 rising rate FPR. I will be running around 18 pounds of boost and my regulator is the standard Aeromotive FPR used when converting the FC fuel system to a parallel system.
Reason I am asking is I just found out Jegs Push Loc hose it NOT to be used for fuel systems. Thank God I found out and of course it was in the fine print(didn't see it PLUS it was being sold in Jegs "Fuel" section, WTF). After a couple pressure tests up to 90 PSI I had a leak developing around the outside of the lines a cuople hours later, almost looked as if the hose was sweating and not leaking from the base of the barb fitting but about an inch up from the end. SO i am going to use NHRA approved push lock hose from Russell.
Russell doesn't list the MAX PSI of the "twist-loc" hose and I want to tell them what I will be running fuel pressure wise.
Never the less I am glad I caught it.
Thanks guys.
Reason I am asking is I just found out Jegs Push Loc hose it NOT to be used for fuel systems. Thank God I found out and of course it was in the fine print(didn't see it PLUS it was being sold in Jegs "Fuel" section, WTF). After a couple pressure tests up to 90 PSI I had a leak developing around the outside of the lines a cuople hours later, almost looked as if the hose was sweating and not leaking from the base of the barb fitting but about an inch up from the end. SO i am going to use NHRA approved push lock hose from Russell.
Russell doesn't list the MAX PSI of the "twist-loc" hose and I want to tell them what I will be running fuel pressure wise.
Never the less I am glad I caught it.
Thanks guys.
07-13-08, 10:36 PM
#3
Eye In The Sky
iTrader: (2)
Join Date: Feb 2001
Location: In A Disfunctional World
Posts: 7,895
Likes: 0
Received 114 Likes
on
66 Posts
First you need to study how they work. The web is a good place to search.
Secondly you did not give us a base pressure which is measured at 0 psi.
This makes it impossible to answer the question.
Thirdly the answer is not a definite but an assumption.
********************************************
Fuel Pressure = Base Pressure + Boost Pressure for your 1:1 RR FPR.
This assumes that the FPR and FP can maintane pressure/flow accurately for the flow rate required for the engine.
But in the real world this will not be 100% true.
Secondly you did not give us a base pressure which is measured at 0 psi.
This makes it impossible to answer the question.
Thirdly the answer is not a definite but an assumption.
********************************************
Fuel Pressure = Base Pressure + Boost Pressure for your 1:1 RR FPR.
This assumes that the FPR and FP can maintane pressure/flow accurately for the flow rate required for the engine.
But in the real world this will not be 100% true.
07-14-08, 02:33 PM
#5
Sorry I didn't put the base pressure. It will be 43 PSI.
cewrx7r1: Thanks for your help but I am well aware of how the RR FPR works. For some dumb reason I thought fuel pressure continued to rise with zero manifold pressure to some degree.
I got the problem solved and again, thanks for your patience with my ignorance. These last two weeks have been a doozie and my rushing has only caused brain farts and expected problems. I need a break.
cewrx7r1: Thanks for your help but I am well aware of how the RR FPR works. For some dumb reason I thought fuel pressure continued to rise with zero manifold pressure to some degree.
I got the problem solved and again, thanks for your patience with my ignorance. These last two weeks have been a doozie and my rushing has only caused brain farts and expected problems. I need a break.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
