Forced Induction Custom FI Setup Questions

need help with fuel system

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Old 05-30-2006, 03:54 PM
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Default need help with fuel system

since i want to hit 10+psi on my 4.3L i need some help with understanding the fuel system. im gonna go with 2x extra injectors.

if i go extra injectors do i need an FMU ? i know if i run an FMU i can run 7 to 8 psi on the stock fuel system. so for the extra injector controller should i just put it on a msd boost switch to kick on @ 7 or 8 psi? how should i go about adding the extra fuel with the extra injectors

btw i cannot upgrade my stock injectors because they are poppet style. so im stuck with the stock 19lbs'ers. thanks for the help

thanks
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Old 05-30-2006, 05:19 PM
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Default Re: need help with fuel system

Originally Posted by 02vortec
since i want to hit 10+psi on my 4.3L i need some help with understanding the fuel system. im gonna go with 2x extra injectors.

if i go extra injectors do i need an FMU ? i know if i run an FMU i can run 7 to 8 psi on the stock fuel system. so for the extra injector controller should i just put it on a msd boost switch to kick on @ 7 or 8 psi? how should i go about adding the extra fuel with the extra injectors

btw i cannot upgrade my stock injectors because they are poppet style. so im stuck with the stock 19lbs'ers. thanks for the help

thanks
no one can help me?
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Old 05-30-2006, 05:25 PM
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Default Re: need help with fuel system

im running three on my charge pipe near throttle body. one is set at 3 next is 6 and next is 9. start off one going off at 1 lb. and if it bogs move up to 2lb or 3lb's and so on until it pulls nicely and their is no bog.
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Old 05-30-2006, 06:06 PM
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Default Re: need help with fuel system

Originally Posted by FLIPINTENTIONS
im running three on my charge pipe near throttle body. one is set at 3 next is 6 and next is 9. start off one going off at 1 lb. and if it bogs move up to 2lb or 3lb's and so on until it pulls nicely and their is no bog.
are you running an fmu or just extra injectors? what controller did you use and isnt it alot of work to get them all to go off at different boost levels? how big are all 3 injectors running on your charge pipe?
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