Only 5# P1SC, still too lean!!!
Thread Starter
On The Tree
Joined: Mar 2002
Posts: 155
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From: nj
Only 5# P1SC, still too lean!!! I am at my wits end. Too lean left & right bank is what Atap reads with my ATI 5lb setup with that crappy FMU set full rich!
I just recieved my 7lb pully with 42lb ford injectors, I guess they wont see the car for a long while, especially after what Dave at Cartek told me?
I called for custom tuning and he said the LS1 has tuning issues when it comes to blowers? Something about the MAF after 400CMF does not register in the PCM and throws the A/F out of whack???
He said they are not tuning any LS1's, that no one else has perfected this issue yet,and to give them a few weeks as they are trying to perfect the tuning of a blown LS1? Has anyone heard of such an issue?
. I can't even get past 5 lbs of boost with good fuel pressure...about 70lbs & full rich on current FMU??? <img border="0" alt="[whiner]" title="" src="graemlins/gr_cry.gif" /> . I feel like I just wasted money at this point and I am jeopardizing my SS.
I just recieved my 7lb pully with 42lb ford injectors, I guess they wont see the car for a long while, especially after what Dave at Cartek told me?
I called for custom tuning and he said the LS1 has tuning issues when it comes to blowers? Something about the MAF after 400CMF does not register in the PCM and throws the A/F out of whack???
He said they are not tuning any LS1's, that no one else has perfected this issue yet,and to give them a few weeks as they are trying to perfect the tuning of a blown LS1? Has anyone heard of such an issue?
. I can't even get past 5 lbs of boost with good fuel pressure...about 70lbs & full rich on current FMU??? <img border="0" alt="[whiner]" title="" src="graemlins/gr_cry.gif" /> . I feel like I just wasted money at this point and I am jeopardizing my SS.
TECH Addict
Joined: Nov 2001
Posts: 2,659
Likes: 1
From: Bellevue, Wa
Re: Only 5# P1SC, still too lean!!! perhaps it's time to find a new tuner?
tons of people running between 6 and 11psi on the board.
you need to ditch the fmu and get enough injector and fuel pump and optionally I recommend a boost referenced fp regulator to take care of your fueling needs.
tons of people running between 6 and 11psi on the board.
you need to ditch the fmu and get enough injector and fuel pump and optionally I recommend a boost referenced fp regulator to take care of your fueling needs.
On The Tree
Joined: Dec 2001
Posts: 137
Likes: 0
From: Atlanta, Georgia
Re: Only 5# P1SC, still too lean!!! I'm using a Vortech superfueler FMU with 42lb injectors,BBK frame mounted fuel pump,with 6.5 PSI and tuned with LS1 edit.It can be done, the fuel system will support up to 12psi in my application...Whatelse is done to your car besides your kit?
Re: Only 5# P1SC, still too lean!!! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by funeclown:
<strong>I called for custom tuning and he said the LS1 has tuning issues when it comes to blowers? Something about the MAF after 400CMF does not register in the PCM and throws the A/F out of whack???
He said they are not tuning any LS1's, that no one else has perfected this issue yet,and to give them a few weeks as they are trying to perfect the tuning of a blown LS1? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Find another tuner, or get LS1 edit.
FWIW, 400 CFM is only about 260 HP
No one has got a handle on boosted LS1's eh??
<img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />
Blackbird is right, get enough pump and injector to handle all the fuel and ditch the FMU.
<strong>I called for custom tuning and he said the LS1 has tuning issues when it comes to blowers? Something about the MAF after 400CMF does not register in the PCM and throws the A/F out of whack???
He said they are not tuning any LS1's, that no one else has perfected this issue yet,and to give them a few weeks as they are trying to perfect the tuning of a blown LS1? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Find another tuner, or get LS1 edit.
FWIW, 400 CFM is only about 260 HP
No one has got a handle on boosted LS1's eh??
<img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />
Blackbird is right, get enough pump and injector to handle all the fuel and ditch the FMU.
