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Unread 08-19-2013   #1 (permalink)
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Default What size injectors?

So guys I have a 92LX 5.0 and I can't decided what injectors I want or need, I am running a e303 cam with ford racing gt40x heads, any suggestions??


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Unread 08-19-2013   #2 (permalink)
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Depending on everything else.

Does it have 19's now......how does it run? How do the plugs look? What fuel pump you got?

24's wouldn't hurt.
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Unread 08-19-2013   #3 (permalink)
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Quote:
Originally Posted by Smurf stang View Post
Depending on everything else.

Does it have 19's now......how does it run? How do the plugs look? What fuel pump you got?

24's wouldn't hurt.
It's running good, plugs are perfect. I just have the stock fuel pump I was thinking of upgrading that too


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Unread 08-19-2013   #4 (permalink)
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What's the duty cycle on the current 19's? Do you have plans for future mods? What MAF are you running as well?
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Unread 08-19-2013   #5 (permalink)
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Quote:
Originally Posted by fordman777 View Post
What's the duty cycle on the current 19's? Do you have plans for future mods? What MAF are you running as well?
Dute cycle? My next mod on order is a hellion 70 mm single turbo kit


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Unread 08-19-2013   #6 (permalink)
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Quote:
Originally Posted by Mustang92lx1995 View Post
Dute cycle? My next mod on order is a hellion 70 mm single turbo kit
It means what percentage are the injectors running at. For example my setup once consisted of 19's. My tuner told me they were running at about 90% cycle. My car at the time was making around 280 rwhp. He told me they were at there max but would still handle the load but bigger injectors like 24's would be better for my combo because they wouldn't have to work as hard. I believe the rule of thumb is anything over 280HP then one should upgrade to larger injectors.

Now you mention that your going to be running a turbo soon so I'd find out what the recommended injector size is for that and wait till then to buy them.
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Unread 08-19-2013   #7 (permalink)
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Quote:
Originally Posted by Mustang92lx1995 View Post
My next mod on order is a hellion 70 mm single turbo kit


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Your going to need 42# or bigger injectors, bigger fuel pump, and possibly custome tune with the turbo.

If it's running good leave it be for now - save your money fr the turo project (your going to need it) elmo.gif
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Unread 08-19-2013   #8 (permalink)
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Do one project at a time.

If you are truly going to do a turbo kit then save your money and start planning.
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Unread 08-20-2013   #9 (permalink)
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Ford provided 24 lb injectors with the GT40 headed vehicles if that any indication of what you need.

You're at the limit with 19s most likely. Only way to know if you are lean is check the A:F
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Unread 08-20-2013   #10 (permalink)
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hi i have a question have a tork tech supercharged kit on my 02 gt 2v i have a 255lph ford gt super car pump would that be able to push 60# injectors tryin to get more hp out of it i have 42# injectors on it now is there any thing else i can do to get more. oh almost forgot the internals are all forged on a stock block
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Unread 08-20-2013   #11 (permalink)
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Read this kidcobra for some fueling info....

(GAS)Fuel System Upgrade Options: What You Need To Know - SVTPerformance
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Just upgrading to bigger injectors isn't going to give you more power. Now if you are maxing out your current injectors and your tuner had to go about tunning around those maxed out injectors then yes you could possibly see some more power with bigger injectors. There is more things to consider in the fuel system than just injectors. The fuel pump is the other bigger thing. Once you get into higher numbers "big power" you will possibly need more than just injectors and pump. The best way to honestly find out what duty cycle your pump or injectors is at is get with your tuner and check it. If you have the stuff and knowledge then you could do it yourself.

Now 90% duty cycle on a set of injectors in my mind I wouldn't be to comfortable on. I could be wrong but I wouldn't push my luck with that and for dang sure would have an A/F ratio gauge to keep an eye on things. There is a lot of factors on this whole subject. Especially if you are running a power adder. Most of what I "hear" is you really don't want to go over 80% duty cycle on this or you are kinda on borrowed time I guess they say. Everyone has their opinions on this and I am not no injector/fuel pump guru. Nor am I a tuner. So if you have a good tuner and take his word then go for it and run em. Most injectors are rated to a certain amount of power if it is N/A or with a power adder. This is just an idea and there is other things to factor as well.
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