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HOW TO homemade "Super FMU"

Old 03-02-2010, 08:35 PM
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Default HOW TO homemade "Super FMU"

Here is a HOW TO, to lower the Fuel Ratio from FMU 12:1 for example to 8:1 or 2:1

To do that we need to bypass the Vac line that goes to the FMU with a MBC to restrict the air pressure the FMU reads, and instead of goes to 12:1 as preset (for example), only raise the fuel pressure controlled by the MBC as you want.

Enjoy
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Old 03-03-2010, 02:59 AM
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+1!!!!!!!!!!!!!!!!!!!!
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Old 03-13-2010, 05:10 AM
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avoid using fmu's as a tuning devise....
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Old 03-13-2010, 10:14 PM
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Originally Posted by busa4 View Post
avoid using fmu's as a tuning devise....
I agree, but FMU are a nice option for low boost 6-7psi.
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Old 03-25-2010, 03:24 PM
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lol add a boost tap on the line and you have a fully incremental super fmu. top ----. not bad for low boostie
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Old 04-05-2010, 11:01 AM
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with any obd1, chipping is way better, and cheaper
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Old 04-11-2010, 01:46 PM
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Originally Posted by MAJORAHOLE View Post
with any obd1, chipping is way better, and cheaper
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Old 04-11-2010, 09:20 PM
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yeah maybe chipping is easier but I have a neon and those ecus are not chippable
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Old 04-28-2010, 03:44 PM
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you never mentioned that
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Old 07-27-2010, 08:27 PM
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Originally Posted by Photonic_Si View Post
lol add a boost tap on the line and you have a fully incremental super fmu. top ----. not bad for low boostie
wat do you mean by boost tap? im planning on running 8psi so i was thinkin going with the fmu just for now. plz help me out
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