Is corvette fuel filter/regulator a straight swap to Fbody?
07-11-2017, 02:40 PM
#21
Second, there is no boost reference on the vette regulator. So you push 15psi of boost and you lose 15psi of fuel pressure. It isn't an option for me regardless.
I got my 411 running at 44psi right now, flawless within a day. I am always adjusting fuel pressure and tune related variables because I feel like it. 15 years of it in fact, various cars. So, not just guessing in the dark.
07-11-2017, 04:03 PM
#24
TECH Senior Member
Lowering the pressure is as bad as raising it; the tune is off because the injectors are not flowing the correct amount of fuel for the air metered. You really do not know what you are doing, as you are not accounting for all the variables in the equation.
07-11-2017, 04:35 PM
#26
As long as the fuel trims are ok it isnt bad to do that. There are so many ways to run a fuel system. Unless you are running HUGE injectors for one reason or another or running boost, there seriously is no reason to do it though.
Older comps have no idea what fuel pressure is. They are like an obedient dog. They throw fuel at something like a dog would run after a stick, and then return the fuel trims. If the fuel trims are wrong, if the dog brought back the wrong stick, and they are like is this good master, then you change the tune up until it is right. Dont give the computer credit for being any smarter than it is. The dog...well pet him of course.
Some larger fuel inj cannot operate at a short enough pw for idle or off idle/cruise so you are stuck with turning the fuel pressure down. That happens normally when you over inject a setup though. The opposite way is true. You can set you base pressure at 58, run the correct inj, and let the boost take care of adding pressure over base and making the inj flow more.
There are so so many ways to do it.
The way he is running his may not be wrong, but what he said DEF was.
It wont prolong the life of the pump either.
Older comps have no idea what fuel pressure is. They are like an obedient dog. They throw fuel at something like a dog would run after a stick, and then return the fuel trims. If the fuel trims are wrong, if the dog brought back the wrong stick, and they are like is this good master, then you change the tune up until it is right. Dont give the computer credit for being any smarter than it is. The dog...well pet him of course.
Some larger fuel inj cannot operate at a short enough pw for idle or off idle/cruise so you are stuck with turning the fuel pressure down. That happens normally when you over inject a setup though. The opposite way is true. You can set you base pressure at 58, run the correct inj, and let the boost take care of adding pressure over base and making the inj flow more.
There are so so many ways to do it.
The way he is running his may not be wrong, but what he said DEF was.
It wont prolong the life of the pump either.
07-11-2017, 04:49 PM
#27
Tune is not a problem if you know how to tune. I've tuned a hundred cars so its not an issue for me to **** with fuel pressure or any other components I desire.
Fact remains lower fuel pressure is easier on fuel system parts- just like lower blood pressure is easier on the bodies parts. All pressure systems typically show this relationship.
And yes, if my fuel pressure is 60psi and I use 15psi of boost, I now have 45psi worth of fuel pressure at the injector, within some significant digit 1% to 10%. If the injector is exposed to boost pressure (direct injection is not).
Fact remains lower fuel pressure is easier on fuel system parts- just like lower blood pressure is easier on the bodies parts. All pressure systems typically show this relationship.
And yes, if my fuel pressure is 60psi and I use 15psi of boost, I now have 45psi worth of fuel pressure at the injector, within some significant digit 1% to 10%. If the injector is exposed to boost pressure (direct injection is not).
07-11-2017, 05:01 PM
#28
from aeromotive tech:
"All testing on Aeromotive fuel pumps for durability is done at 60-PSI. We typically see 2,000 run hours from a 340 Stealth Pump at 60-PSI and 13.5 volts. That said, lower pressure and/or slower speed can extend pump life, but you would need to change injectors (possibly) and retune the ECU (certainly) if you plan to run lower pressure."
Hope that helps, let us know if you need further assistance and thanks for choosing Aeromotive!
Brett Clow
Tech Director
trying to be civil here but literally 15 years of setting up engines vs a bunch of tech talk idiots who jerk each other off all time
I wont post something that I sound like I am sure of, unless I am sure of it within a fairly high confidence interval say 99.1%
"All testing on Aeromotive fuel pumps for durability is done at 60-PSI. We typically see 2,000 run hours from a 340 Stealth Pump at 60-PSI and 13.5 volts. That said, lower pressure and/or slower speed can extend pump life, but you would need to change injectors (possibly) and retune the ECU (certainly) if you plan to run lower pressure."
Hope that helps, let us know if you need further assistance and thanks for choosing Aeromotive!
Brett Clow
Tech Director
trying to be civil here but literally 15 years of setting up engines vs a bunch of tech talk idiots who jerk each other off all time
I wont post something that I sound like I am sure of, unless I am sure of it within a fairly high confidence interval say 99.1%
07-11-2017, 05:08 PM
#29
You have alot to learn about fuel systems, blood pressure, and anaolgies it seems.
Lower blood pressure than normal can cause fainting and heart attacks as well as many other issues. So please stop using that.
And no you dont have 45psi at the inj tip whether you add..um 1% or 10%? that makes no sense.
How do reg supercharger kits and even most turbo kits work so well with such a huge drop in pressure? They normally just come with larger injectors but properly sized for the hp output. You are misunderstanding what happens under boost in a manifold. Yes it does give resistance to the atomized fuel coming out of the inj, but is not directly proportional. If what you say is true and you run 36lbs cruising then at 15lbs you are only making 51 psi which, in your theory would be the same as 7lbs on a 58psi fuel pressure. Does that seem right?
You should seriously watch that feather light chip on your shoulder as well. No one cares how long youve worked on anything, esp when you bring such a nasty attitude.
What stock pump runs on 13.5v? Most pumps are even hotwired for 12. The lack of voltage to the pump is what kills them not running at 4bar vs 3 bar. There are many MANY of the racetronix 255 kits out there and rhe same pump is used for lt cars (3bar) as 98 ls cars (4bar) pretty much. They both will have nearly exactly the same service interval. Years.
Lower blood pressure than normal can cause fainting and heart attacks as well as many other issues. So please stop using that.
And no you dont have 45psi at the inj tip whether you add..um 1% or 10%? that makes no sense.
How do reg supercharger kits and even most turbo kits work so well with such a huge drop in pressure? They normally just come with larger injectors but properly sized for the hp output. You are misunderstanding what happens under boost in a manifold. Yes it does give resistance to the atomized fuel coming out of the inj, but is not directly proportional. If what you say is true and you run 36lbs cruising then at 15lbs you are only making 51 psi which, in your theory would be the same as 7lbs on a 58psi fuel pressure. Does that seem right?
You should seriously watch that feather light chip on your shoulder as well. No one cares how long youve worked on anything, esp when you bring such a nasty attitude.
What stock pump runs on 13.5v? Most pumps are even hotwired for 12. The lack of voltage to the pump is what kills them not running at 4bar vs 3 bar. There are many MANY of the racetronix 255 kits out there and rhe same pump is used for lt cars (3bar) as 98 ls cars (4bar) pretty much. They both will have nearly exactly the same service interval. Years.
Last edited by tech@WS6store; 07-11-2017 at 05:14 PM.
07-11-2017, 05:17 PM
#30
You have alot to learn about fuel systems, blood pressure, and anaolgies it seems.
Lower blood pressure than normal can cause fainting and heart attacks as well as many other issues. So please stop using that.
And no you dont have 45psi at the inj tip whether you add..um 1% or 10%? that makes no sense.
How do reg supercharger kits and even most turbo kits work so well with such a huge drop in pressure? They normally just come with larger injectors but properly sized for the hp output. You are misunderstanding what happens under boost in a manifold. Yes it does give resistance to the atomized fuel coming out of the inj, but is not directly proportional. If what you say is true and you run 36lbs cruising then at 15lbs you are only making 51 psi which, in your theory would be the same as 7lbs on a 58psi fuel pressure. Does that seem right?
You should seriously watch that feather light chip on your shoulder as well. No one cares hlw long youve wormed on anything, esp when you bring such a nasty attitude.
Lower blood pressure than normal can cause fainting and heart attacks as well as many other issues. So please stop using that.
And no you dont have 45psi at the inj tip whether you add..um 1% or 10%? that makes no sense.
How do reg supercharger kits and even most turbo kits work so well with such a huge drop in pressure? They normally just come with larger injectors but properly sized for the hp output. You are misunderstanding what happens under boost in a manifold. Yes it does give resistance to the atomized fuel coming out of the inj, but is not directly proportional. If what you say is true and you run 36lbs cruising then at 15lbs you are only making 51 psi which, in your theory would be the same as 7lbs on a 58psi fuel pressure. Does that seem right?
You should seriously watch that feather light chip on your shoulder as well. No one cares hlw long youve wormed on anything, esp when you bring such a nasty attitude.
So in an engine application, I find my injector size, I find my headroom at some pressure to be 80% or 90% Duty cycle or whatever desired, and that is my max pressure to support power. No need to go any higher than that. This, using the smallest injector possible, with the lowest fuel pressure possible, is the goal (for production daily drivers/reliable transportation/economy).
Forget everything you know about engines for the next one. Just imagine this.
Fuel pressure is 0psi
intake manifold pressure is 0psi
the injector opens: what happens?
You might get a drip drip drip effect from gravity. We call that negligible flow. That is your 1% to 10% of negligible flow I mentioned.
Now increase both the same rate- 15psi fuel pressure, 15psi manifold pressure.
Same thing happens.
07-11-2017, 05:41 PM
#33
Why keep on with this pissing match that you insist on turning every thread in to when you arent brining much to the discussion table?
The original post you had about running a lower pressure was fine. a bit self absorbed and arrogant but fine. After that the chip got shot and it turned into talon on a tide box. The initial theory was right but what you said was wrong. And every post after as well. You claim to be a smart man, but you should practice being humble.
The original post you had about running a lower pressure was fine. a bit self absorbed and arrogant but fine. After that the chip got shot and it turned into talon on a tide box. The initial theory was right but what you said was wrong. And every post after as well. You claim to be a smart man, but you should practice being humble.
07-11-2017, 06:03 PM
#34
TECH Senior Member
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He overthinks everything, tries to re-engineer everything, and can never be told he is wrong. With his particular knowledge and particular attitude these conversations are a daily occurrence for him. BOOM!
07-11-2017, 06:17 PM
#35
TECH Senior Member
It does help all but you, because he is right, and you are wrong. Plus, anyone reading this thread agrees with him, and not you. Some of the people here ARE engineers, and you are not. Your comments make that obvious. You are here to feed your starving ego with your delusions of authoritative automotive knowledge, but nobody here buys it. Nobody is impressed at all.
Are you starting to get the picture?
Are you starting to get the picture?
07-11-2017, 11:05 PM
#38
11 Second Club
iTrader: (3)
You will have to modify the fuel line coming out from the filter to your fuel rail also. I removed a portion of the line and the block for the return line then cut and flared an aluminum line and ran AN fittings. So far my fuel pressure holds steady at about 60 psi. I currently have the engine back out but will snap some pictures of my set up and post them.
07-12-2017, 09:11 PM
#40
11 Second Club
iTrader: (3)
Glad to see someone simplified the mod for us. That was not around when I did it so thanks for sharing!
