4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Injector Size?

Old 05-20-2007, 01:27 AM
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99STEEDAGT
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Default Injector Size?

I'm in the middle of building a new motor for my 99 GT. I have a stock block, with forged internals, Ross pistons, Fox Lake stage 2 heads, Fox Lake's P-51 intake manifold, and Comp Cams. Since I'm not getting a supercharger anytime soon, can I use the stock fuel injectors, or should I go to a larger size? Thanks in advance for your help!
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Old 05-20-2007, 02:47 AM
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DeltaV
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Default RE: Injector Size?

I would suggest a larger injector for your application. The stock injectors can hold up to ~320rwhp. It seems like you are goign to make a little more than that. You should at least go with the 24 if not the 36 lb. ers. It will put less strain on your fuel system if you don't try to max out a fuel injector!
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Old 05-20-2007, 02:52 AM
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code3GT
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Default RE: Injector Size?

30#'s will work well...don't forget to upgrade your fuel pump.
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Old 05-20-2007, 04:17 PM
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ZW99GT
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Default RE: Injector Size?

I'm running 24's with 330rwhp
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Old 05-20-2007, 06:15 PM
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undecided.steve
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Default RE: Injector Size?

ORIGINAL: 99STEEDAGT

I'm in the middle of building a new motor for my 99 GT. I have a stock block, with forged internals, Ross pistons, Fox Lake stage 2 heads, Fox Lake's P-51 intake manifold, and Comp Cams. Since I'm not getting a supercharger anytime soon, can I use the stock fuel injectors, or should I go to a larger size? Thanks in advance for your help!
I think the FRPP catalog has a section on sizing injectors to application.
You might want to look there.


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Old 05-20-2007, 11:08 PM
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cammed99gt
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Default RE: Injector Size?

24's should be good.I think there good for 375 give or take.I would go with aleast 30's then u can put a little shot of nitrous if u wanted later on
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Old 05-21-2007, 02:42 AM
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99STEEDAGT
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Default RE: Injector Size?

Thanks for all your input guys!
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