Opinions on the ATI FMU ?
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Opinions on the ATI FMU ? I have a 2002 gmc truck with a procharger P1-sc charger in it
I have ls1 edit and an going to have someone program the truck can i get rid of the FMU unit that ATI provides ?
it's acting a little funny as of late when i get into it the truck bogs until the fmu kicks in
it used to be alot smoother now it's really noticble when the fmu kicks in
Can i get rid of it with some programming ?
thanks a bunch
Jim
I have ls1 edit and an going to have someone program the truck can i get rid of the FMU unit that ATI provides ?
it's acting a little funny as of late when i get into it the truck bogs until the fmu kicks in
it used to be alot smoother now it's really noticble when the fmu kicks in
Can i get rid of it with some programming ?
thanks a bunch
Jim
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From: Deep in the seedy underworld of Koonerville
Re: Opinions on the ATI FMU ? Yes, you can get rid of the FMU as long as you have big enough injectors to handle the fuel supply.
I got rid of the FMU on my SS. I then upgraded to 42# injectors, bigger inline pump, programming and everything was great.
Make sure that whoever tunes the computer takes into account that the fuel pressure will drop as boost pressure rises. It would be best to get it tuned on a wideband dyno.
Here are my thoughts on the ATI FMU <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />
<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John
I got rid of the FMU on my SS. I then upgraded to 42# injectors, bigger inline pump, programming and everything was great.
Make sure that whoever tunes the computer takes into account that the fuel pressure will drop as boost pressure rises. It would be best to get it tuned on a wideband dyno.
Here are my thoughts on the ATI FMU <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />
<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John
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Re: Opinions on the ATI FMU ? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by XLR8NSS:
<strong>Yes, you can get rid of the FMU as long as you have big enough injectors to handle the fuel supply.
I got rid of the FMU on my SS. I then upgraded to 42# injectors, bigger inline pump, programming and everything was great.
Make sure that whoever tunes the computer takes into account that the fuel pressure will drop as boost pressure rises. It would be best to get it tuned on a wideband dyno.
Here are my thoughts on the ATI FMU <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />
<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">shouldn't a big enough fuel pump be able to maintain constant and steady fuel pressure even if the boost rises?
<small>[ September 16, 2002, 10:24 PM: Message edited by: Nickn20 ]</small>
<strong>Yes, you can get rid of the FMU as long as you have big enough injectors to handle the fuel supply.
I got rid of the FMU on my SS. I then upgraded to 42# injectors, bigger inline pump, programming and everything was great.
Make sure that whoever tunes the computer takes into account that the fuel pressure will drop as boost pressure rises. It would be best to get it tuned on a wideband dyno.
Here are my thoughts on the ATI FMU <img border="0" alt="[barf]" title="" src="graemlins/gr_barf.gif" />
<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
John</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">shouldn't a big enough fuel pump be able to maintain constant and steady fuel pressure even if the boost rises?
<small>[ September 16, 2002, 10:24 PM: Message edited by: Nickn20 ]</small>
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From: Bellevue, Wa
Re: Opinions on the ATI FMU ? nope.
unless you have a rising rate regulator then the effective FP at the rails drop 1 psi for every psi of boost.
thats why it's ideal to get a 1:1 vacum/boost referenced regulator. then you can truely maintain a constant FP under all circumstances. assuming your pump can keep up.
unless you have a rising rate regulator then the effective FP at the rails drop 1 psi for every psi of boost.
thats why it's ideal to get a 1:1 vacum/boost referenced regulator. then you can truely maintain a constant FP under all circumstances. assuming your pump can keep up.
