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how to calculate how much fuel to run... and how to get that? fmu?

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how to calculate how much fuel to run... and how to get that? fmu?

Old 11-22-2005, 07:54 PM
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Default how to calculate how much fuel to run... and how to get that? fmu?

i want to run around 7 psi on my v6, i have no idea and i cant find much on how much more fuel pressure i will need to make... i want to go low budget on the whole kit and im looking towards an fmu... what does anyone recommend? a 10:1, 12:1 ? ... or is that even too much?... i just want to have a good idea of a setup before i get an a/f gauge and start to tune..., or is that the only way to know how much fuel to run so i dont lean out..?...
-thanks
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Old 11-22-2005, 07:57 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

drop the FMU idea man you SHOULD be getting your ecu chipped instead works alot better runs like new... but if u wanna get a FMU then get the 12:1 cus i got a 12:1 on my civic 1.5 litre and it works fine just stumbles a little bit at idle...
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Old 11-22-2005, 09:24 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

ditch the fmu and get your ecu chipped with a basemap, i have seen many engines been fucked by lack of fuel management it costs just a little bit more but you'll be on the safe side
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Old 11-22-2005, 09:54 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

just get an adjustable FMU if your going that way, one you can change the discs out
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Old 11-23-2005, 01:10 AM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

Originally Posted by saxxu
ditch the fmu and get your ecu chipped with a basemap, i have seen many engines been fucked by lack of fuel management it costs just a little bit more but you'll be on the safe side
it's not a honda guys
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Old 11-23-2005, 01:52 AM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

IMHO, on a low boost setup like that, an FMU will do just fine. Id look for an adjustable rate-of-rise FMU like a Bell.
Id start with around 8psi of extra fuel pressure per psi of boost. Im sure that will get you pretty close, and go from there with a WB.

I assume this is on a fuel injected engine?
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Old 11-28-2005, 01:46 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

alright this info is good thanks alot... where should i look for FMUs?... ebays got em but i dont think those have changeable plates
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Old 11-28-2005, 05:15 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

Originally Posted by blackoutgt
i just want to have a good idea of a setup before i get an a/f gauge and start to tune..., or is that the only way to know how much fuel to run so i dont lean out..?... -thanks
I hope you are referring to a wideband o2, not a $60 autometer one.
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Old 11-28-2005, 07:27 PM
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Default Re: how to calculate how much fuel to run... and how to get that? fmu?

Originally Posted by SloS13
I hope you are referring to a wideband o2, not a $60 autometer one.
yea so i've read... i really dont understand the difference ... but i know to buy a wideband instead of just an ebay a/f gauge... what is the big difference?
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