How come 35 PSI is safe?
Re: How come 35 PSI is safe? 35 PSI is not necessarily "safe". Most definately it would cause a lean condition under most circumstances. Lean enough to cuase damage? With a large shot...probably. I think the FPSS is more to catch a sudden complete loss of fuel pressure than a sustained low pressure condition. But its all in how you set your system up. I would prefer to have a feul pressure gauge to monitor for a continued low pressure problem and rely on the FPSS to kick in in the event of a major loss of fuel pressure. At least that the way Ive alwasy approached the matter.
Everyone complains about the "reliabilty" of the FPSS but I really think its a reliable unit when you are talking fuel pressure/no fuel pressure. I would not necessarily setup the FPSS to be to be the FP "monitor" as I think the on/off actuating pressure required to trip the switch probably varies quite a bit with Temps and conditions and is not accurate enough for that type of duty. But I do feel confidant that if my fuel pressure dropped drastically the FPSS would catch it.
That doesnt mean you shouldnt set it at the uppermost limit of pressure without it cutting out. I would still do that. But in my daily approach to fuel monitoring I monitor fule pressure constantly for any signs of abnormalities with the fuel pressure gauge. I also monitor 02s as much as possible when spraying. I have the FPSS only for that massive pressure drop should it ever occur and Im not watching the FP guage.
Oh...btw..with a 100 shot i would be worried if your pressure dropped below 50 psi or so.
Everyone complains about the "reliabilty" of the FPSS but I really think its a reliable unit when you are talking fuel pressure/no fuel pressure. I would not necessarily setup the FPSS to be to be the FP "monitor" as I think the on/off actuating pressure required to trip the switch probably varies quite a bit with Temps and conditions and is not accurate enough for that type of duty. But I do feel confidant that if my fuel pressure dropped drastically the FPSS would catch it.
That doesnt mean you shouldnt set it at the uppermost limit of pressure without it cutting out. I would still do that. But in my daily approach to fuel monitoring I monitor fule pressure constantly for any signs of abnormalities with the fuel pressure gauge. I also monitor 02s as much as possible when spraying. I have the FPSS only for that massive pressure drop should it ever occur and Im not watching the FP guage.
Oh...btw..with a 100 shot i would be worried if your pressure dropped below 50 psi or so.
Teching In
Joined: Dec 2002
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From: va
Re: How come 35 PSI is safe? I wouldn't go by that setting
the units are adjustable, and personally I would
set it to about 47-50 psi depending on how much
your pressure drops on the initial hit
say when you engage the nitrous(this is where it helps to have a fuel pressure gauge mounted in the cockpit)the pressure drops to 45 and immediately recovers to stock setting you would wasnt to set your FPSS at 43.
this reading is going to happen very quick
so it will help to have a second person in the car
have fun
the units are adjustable, and personally I would
set it to about 47-50 psi depending on how much
your pressure drops on the initial hit
say when you engage the nitrous(this is where it helps to have a fuel pressure gauge mounted in the cockpit)the pressure drops to 45 and immediately recovers to stock setting you would wasnt to set your FPSS at 43.
this reading is going to happen very quick
so it will help to have a second person in the car
have fun
Re: How come 35 PSI is safe? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by felton316:
<strong> Probably, because on a 5.0 mustang, the stock fuel pressure is set at 38psi. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">exactly, most cars use much lower pressure.
Ryan.
<strong> Probably, because on a 5.0 mustang, the stock fuel pressure is set at 38psi. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">exactly, most cars use much lower pressure.
Ryan.
TECH Enthusiast
Joined: Jan 2002
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How come 35 PSI is safe? NX basic wet kit has its FPSS pre-set on 35PSI, so if i'm running 100 shot and preassure drops to 36 PSI it is still safe to run nitrous?
I'm asking because stock preassure is about 55-58PSI, right, so the kit is made to run at this preassure,so how it can be safe to run nitrous on 35 PSI?
the car is 2k1 trans am.
Thank you for correcting me <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I'm asking because stock preassure is about 55-58PSI, right, so the kit is made to run at this preassure,so how it can be safe to run nitrous on 35 PSI?
the car is 2k1 trans am.
Thank you for correcting me <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
