upgrading injector size
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Bullitt Member
Joined: May 21, 2013
Posts: 237
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From: OK
Didn't think my what injector is correct would get this type of response. Oh well..
Ok so if the flow needed is 40% more and our systems are rated up to 600hp that would still leave me a little bit of a window for maxing out flow, right. The bigger injectors is just a safeguard right?
To my knowledge , most FI setups do not increase fuel pump size until they get to the 600 hp mark? I guess I could go with a high flow fuel rail but it just doesn't seem it would be needed with my setup.
I dunno
Ok so if the flow needed is 40% more and our systems are rated up to 600hp that would still leave me a little bit of a window for maxing out flow, right. The bigger injectors is just a safeguard right?
To my knowledge , most FI setups do not increase fuel pump size until they get to the 600 hp mark? I guess I could go with a high flow fuel rail but it just doesn't seem it would be needed with my setup.
I dunno
Mach 1 Member
Joined: March 10, 2014
Posts: 564
Likes: 0
From: Manchester, NH
I agree here, I am in no way CLOSE to knowing it all, I know a fair amount and know what I can't do. A simple injector swap on the 11+ is all you need for E85, that has been tried and true for almost 4 years now. Some cars with 50,000 plus E85 miles.
I, myself will never run a BAP. A friend lost a BAP at the big and and lost pressure and you know the rest. If it was my build I would do another pump and make it a return system.
But picking up 3mph and 2 tenths is pretty big(DA was -900ish all night) and same left lane. The other things ARE possible but this was on a PD blower car that was heat soaked and still picked that kind of time up. All things being considered the E85 in my opinion is what made the change.
Sorry if I came off rude to you, friend.
I, myself will never run a BAP. A friend lost a BAP at the big and and lost pressure and you know the rest. If it was my build I would do another pump and make it a return system.
But picking up 3mph and 2 tenths is pretty big(DA was -900ish all night) and same left lane. The other things ARE possible but this was on a PD blower car that was heat soaked and still picked that kind of time up. All things being considered the E85 in my opinion is what made the change.
Sorry if I came off rude to you, friend.
We are a stronger group united than we are against one another. Discussions are good. That's how we pick stuff up. None of us know everything. Those who believe they do are preparing themselves for failure. :-)
Mach 1 Member
Joined: June 24, 2011
Posts: 755
Likes: 1
From: Delaware
Didn't think my what injector is correct would get this type of response. Oh well..
Ok so if the flow needed is 40% more and our systems are rated up to 600hp that would still leave me a little bit of a window for maxing out flow, right. The bigger injectors is just a safeguard right?
To my knowledge , most FI setups do not increase fuel pump size until they get to the 600 hp mark? I guess I could go with a high flow fuel rail but it just doesn't seem it would be needed with my setup.
I dunno
Ok so if the flow needed is 40% more and our systems are rated up to 600hp that would still leave me a little bit of a window for maxing out flow, right. The bigger injectors is just a safeguard right?
To my knowledge , most FI setups do not increase fuel pump size until they get to the 600 hp mark? I guess I could go with a high flow fuel rail but it just doesn't seem it would be needed with my setup.
I dunno
Mach 1 Member
Joined: March 10, 2014
Posts: 564
Likes: 0
From: Manchester, NH
If you want to run an injector @ 90% duty cycle you need an injector that flows 41 pounds of fuel an hour or 426cc's per minute for E85 fuel that will support 450 HP.
So lets end the argument and walk it through. There are 8 cylinders @ 426cc/min. That is 3.4 liters of fuel per minute. 3.4 liters per minute is 204 liters an hour. So a stock fuel pump is adequate for 450 HP running E85? Let's see what is needed for 600 HP running E85. You need a fuel pump that will support 270 liters per hour. Now I will say you should never run a fuel pump at 100 percent duty cycle which is what my math did. Ideally you should run a pump at 80 percent max to be safe. So that said you really need a 240 liter/hour pump for 450 HP and 324 liters /hour for 600 HP.
Does anyone know how much fuel our stock fuel pumps will flow? I do not have that handy. Once we get that detail we can quickly determine how adequate the factory fuel pump is for E85.
So lets end the argument and walk it through. There are 8 cylinders @ 426cc/min. That is 3.4 liters of fuel per minute. 3.4 liters per minute is 204 liters an hour. So a stock fuel pump is adequate for 450 HP running E85? Let's see what is needed for 600 HP running E85. You need a fuel pump that will support 270 liters per hour. Now I will say you should never run a fuel pump at 100 percent duty cycle which is what my math did. Ideally you should run a pump at 80 percent max to be safe. So that said you really need a 240 liter/hour pump for 450 HP and 324 liters /hour for 600 HP.
Does anyone know how much fuel our stock fuel pumps will flow? I do not have that handy. Once we get that detail we can quickly determine how adequate the factory fuel pump is for E85.
Last edited by 2014GHIGGT; Apr 1, 2014 at 06:50 PM.
Member
Joined: September 5, 2019
Posts: 5
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Info:
Fuel Pump Flow Test - 5.0 Mustang & Super Fords Magazine
http://www.mustangandfords.com/how-t...ump-flow-test/
http://www.mustangandfords.com/how-t...ump-flow-test/
Member
Joined: September 5, 2019
Posts: 5
Likes: 1
Here you go
there is no way a stock Coyote fuel pump is going to support 900 rwhp. In the car using the stock 13.5 volts and nominal 55-psi fuel pressure, and not having to work against supercharger boost, Kenne Bell figures the stock pump is good up to 281 liters per hour, or 753 rwhp. Obviously this is one heck of a pump, and you don't have to buy it or install it because your Mustang came off the showroom floor with it.
Member
Joined: February 10, 2024
Posts: 15
Likes: 6
From: USA
This thread had me on my toes.
Very informative though i must say.
I have a stock besides exhaust, 2013 gt 5.0 and im so excited to start doing **** and wanting to get this an that. But..im thunking im just gonna baby her until i can get like a majority of the stuff done all at once. Now. Ihave a new thread in mind.. peace out fellas
Very informative though i must say.
I have a stock besides exhaust, 2013 gt 5.0 and im so excited to start doing **** and wanting to get this an that. But..im thunking im just gonna baby her until i can get like a majority of the stuff done all at once. Now. Ihave a new thread in mind.. peace out fellas
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alcarames
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Feb 1, 2012 09:23 AM