2011-2015 Mustang V6 stock injector size

[Aimless]

Correct me if I'm wrong. but by my calculation is seem that stock injector size on these engines are 28lb/h (at 3 bar/43.5psi)

I got this value form the stock tune "Flow Rate High" value of 41.19lb/h at 64psi rail pressure. Now when shopping for injectors most injector are flow rated at 3bar/43.5 psi no 64psi. So now to correct for the pressure difference I do the following calculation.
41.19/64*43.5 = 28 lb/h

if I do same calc on the "Flow Rate Low"
46.83/64*43.5 = 31.8 lb/h

Screenshot 2023-11-06 204438.png

Did I read this information right or is hte "Flow rate" under the "injector control" is not what I think it is?
I'm doing a turbo install, so need to get injectors that would low more than 28lb/h (at 3Bar)?

[veeefour]

Well they are too small and around 30lb. You need 50 or 60 lb at least. I can advise you on specific injectors that will fit, provide a data and a tune as we turbod a lot of Cyclones.

Hit me up should you be interested.

[Aimless]

Thanks veeefour, but I've already bought 2012 GT500 injectors. By my calculation these injectors should flow 53.6lb/h at 43.5psi?
48.2/39.15*43.5=53.6lb/h

Screenshot 2023-11-06 204333.png

My goal is not to make lot's power, I just like turbo is planning to run low boost of 5psi for starters

[veeefour]

Thanks veeefour, but I've already bought 2012 GT500 injectors. By my calculation these injectors should flow 53.6lb/h at 43.5psi?
48.2/39.15*43.5=53.6lb/h

Screenshot 2023-11-06 204333.png

My goal is not to make lot's power, I just like turbo is planning to run low boost of 5psi for starters

Keep in mind Cyclones use short style injectors.

[Aimless]

Keep in mind Cyclones use short style injectors.

yes the cyclone come with "short" or "compact" size injector, and 2012 GT500 uses "standard" size injectors. From my research this is a common injectors to use on Cyclones and from watching a video I saw "standard size" injector fit into the Cyclone fuel rail.
Is it wrong to put "standard" size injector into this engine with stock fuel rail?

Screenshot 2023-11-09 055628.png

[Thatwhite5.0]

How are you going to make the injector smaller?

[Aimless]

How are you going to make the injector smaller?

with a hack saw
Just kidding. I'll try to post a link of the video of hte installation of "standard" size injectors into stock Cyclone fuel rail.
From my understanding the stock "compact" injectors are retained and spaced out in the fuel rail by metal clips. The fuel rail itself is deep enough for "standard" size injectors and spacers won't be required.

[Aimless]

How are you going to make the injector smaller?

https://youtu.be/GJhtkJ9jYns?si=iQxMeXVFZLA1IrPN

[SiriusC1024]

You're calculating incorrectly. It's not a proportional change.

IFR2 = IFR1*SQRT(P2/P1)

For your first example, flow at 43.5psi to 64psi:
IFR2 = 28*SQRT(64/43.5)
IFR2 = 33.96 @ 64psi

Then the other way, 64psi to 43.5
IFR2 = 41.19*SQRT(43.5/64)
IFR2 = 33.96 @ 43.5psi THIS is stock injector size at 3 bar.

Strange how the numbers you picked ended up with the same numbers for IFR, but pay attention that the IFR's are for different pressures.

You can also use the handy tool in VCM Editor>Tools>Unit Conversion>Fuel Injector Calc

Correct, go by flow rate high. Flow rate low is for the short pulse/non-linear region. The breakpoint is where high and low intersect.

[Aimless]

You're calculating incorrectly. It's not a proportional change.

IFR2 = IFR1*SQRT(P2/P1)

For your first example, flow at 43.5psi to 64psi:
IFR2 = 28*SQRT(64/43.5)
IFR2 = 33.96 @ 64psi

Then the other way, 64psi to 43.5
IFR2 = 41.19*SQRT(43.5/64)
IFR2 = 33.96 @ 43.5psi THIS is stock injector size at 3 bar.

Strange how the numbers you picked ended up with the same numbers for IFR, but pay attention that the IFR's are for different pressures.

You can also use the handy tool in VCM Editor>Tools>Unit Conversion>Fuel Injector Calc

Correct, go by flow rate low. Flow rate high is for the short pulse/non-linear region. The breakpoint is where high and low intersect.

Awesome! thanks for that correction! I was able to calculate it by hand and with Fuel Injector Calculator.
What I'm wondering how is that why when I open stock tune of 2013-2014 GT500 from the tune repository I don't see stock injector flow rates at 52lb/h?
Everywhere online M-9593-MU52 injectors are labeled as 2013-2014 GT-500 OEM injectors with 52lb/h flow rate.
Am I missing something?
Screenshot 2023-11-11 072454.png

[SiriusC1024]

Here's the datasheet for those injectors.

I'm not sure why the data entered in the GT500 tune is like that.

Also, I got that completely backward. AHISL (high slope) is what you use for flow ratings.

[Aimless]

Here's the datasheet for those injectors.

I'm not sure why the data entered in the GT500 tune is like that.

yes, and if I convert AHISL value from that datasheet from lb/s to lb/h. Like this 0.015851lb/s * 3600s/h = 57.0636lb/hr again I'm getting 57lb/h flow rate
so AHISL in the MU52 datasheet does match "Flow Rate High Slope" in the repository tune.
Still don't see where the 52lb/h value comes from

Also, I got that completely backward. AHISL (high slope) is what you use for flow ratings.

haha yea I assumed you meant high when you typed low in the previous post, as you did calculation based on the "Flow Rate High" value.

[SiriusC1024]

There's all kinds of advertised flow rates.

Here it's 52lb/hr:
https://performanceparts.ford.com/part/M-9593-MU52

Here it's 56lb/hr:
https://www.vmpperformance.com/56-lb...Set-of-8-GT500

It's trifling. That's why I try to find the datasheet. According to it they are 57.06lb/[email protected] and 60.15lb/[email protected]. At the industry standard 3-bar rating they are technically 60lb/hr injectors.

The nominal rated flow isn't critical to get perfect (whether the injector is called 52 or 56). For example, ratings are typically for n-Heptane. Using gasoline the lb/hr rating will go up, multiplied by 1.04 to 1.07, due to gasoline being higher density. What is important is the actual data.

The Hi slope means slope at Hi flow regions, beyond non-linear compensation. I get it backward in my head because the actual line of Lo slope is a higher slope graphically-speaking.

I guess the point is pay attention to pressures and flow when spec'ing injectors.

[Aimless]

got it! I just wanted to make sure I'm not misunderstanding something. But yea it all makes sense, just need to use values from the datasheets and ignore marketing material

[Aimless]

Keep in mind Cyclones use short style injectors.

haha veeefour instead of trying to scare people into paying for "expert" advice maybe try to contribute for a change. And thanks for the negative reputation review lol

[veeefour]

haha veeefour instead of trying to scare people into paying for "expert" advice maybe try to contribute for a change. And thanks for the negative reputation review lol

What?!? You gave me a negative feedback...not sure what your problem is...Im no trying to scare anyone LOL
Sail away...