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fuel pressure? fmu adjustment?

Old 05-05-2006, 04:32 PM
  #1  
0.5 BAR
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Default fuel pressure? fmu adjustment?

I am running a mini me with a greddy turbo(19t) in my car. What fuel pressure should I adjust to for 7lbs of boost? And what fmu ratio should I adjust to? Any help would be great. I am running stock injectors/pump.
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Old 05-05-2006, 07:30 PM
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Default Re: fuel pressure? fmu adjustment?

48 psi

10:1 <-- Total guess...I hate FMUs
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Old 05-08-2006, 12:12 PM
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Default Re: fuel pressure? fmu adjustment?

Thanks, I am running like 42 psi on a walbro 255, and the fmu is 12:1. So far so good, making great power for 10 lbs, no pinging, a/f's are great. thanks for the input
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Old 05-10-2006, 12:03 PM
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Default Re: fuel pressure? fmu adjustment?

don't mean to hijack your thread but what do the different ratios on FMU's scale up? I realize amount of fuel of based on vacuum but how does like a 12:1 to 10:1 and 8:1 all differ? I'm planning on running a FMU and 255lph fuel pump on my Z since MS is kinda out of my pocketbook right now. Would a adj fpr be ideal too?
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Old 05-10-2006, 12:51 PM
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Default Re: fuel pressure? fmu adjustment?

12:1
means 12psi is gona be added per lbs of boost.

8:1
8psi/lbs of boost
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Old 05-10-2006, 01:49 PM
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Default Re: fuel pressure? fmu adjustment?

Thanks for tidbit of info on my ?. Gracios.
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