adding enough fuel for boost
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From: Gig Harbor, Wa
adding enough fuel for boost How do you get the computer to add enough fuel when under boost? I plan on running between 8 and 10# boost. Can you just use an FMU or do you need to tune the computer to react differently when boosted?
Re: adding enough fuel for boost our computers cant read 'boost' pressure per say but it can read airflow through the maf so it can 'calibrate' for how much air is comming in and set the right pulsewidth (until you go out of maf range)
so if you dont do that, the computer will add the right amoung of fuel.. but thing is that the boost is keeping 1psi per psi of fuel from getting out of the injectors, so then all you need is a boost referrenced fuel pressure regulator to add that 1psi fuel per 1psi boost back in.
then you get in to the general need for the mixture to be richer for a FI car than NA so you have to monitor that and change it accordingly with some hard or software.
then you are just fine <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<small>[ February 09, 2003, 12:05 PM: Message edited by: MIGHTYMOUSE ]</small>
so if you dont do that, the computer will add the right amoung of fuel.. but thing is that the boost is keeping 1psi per psi of fuel from getting out of the injectors, so then all you need is a boost referrenced fuel pressure regulator to add that 1psi fuel per 1psi boost back in.
then you get in to the general need for the mixture to be richer for a FI car than NA so you have to monitor that and change it accordingly with some hard or software.
then you are just fine <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<small>[ February 09, 2003, 12:05 PM: Message edited by: MIGHTYMOUSE ]</small>
