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90 millimeter Lightning SVT Mass air final tune

Old 04-17-2019, 07:52 AM
LX 5.0
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Location: FL
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Default 90 millimeter Lightning SVT Mass air final tune

I have a 1990 mustang with a blower, GT 40 heads, intake, cam ect... Besides boring out the cylinders my cars engine was recently rebuilt. I got a custom tune amounting to 422hp. The tuner said my mass air was pegging out. He recommended either a 90 mil SCT BA 2600, or Diablosport Mafia MAF extender. I currently have a 90 mil 01-04 lightning mass air housing and sensor which is identical to the SVT 03-04 Cobra. I have read the mass air set up I have can support up to 500 HP. Does my current mass air set up on a 1990 fox need to be upgraded? To my knowledge my mass air sensor will work but must have MAF extender in order to not run lean at high RPM's. My plan is to get the SCT BA 2600 and will re-tune the car. Any advice is much appreciated.
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Old 04-19-2019, 09:25 PM
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with my software, i can tell if the meter is maxing out. I assume his can too.

i believe part of the issue may be the difference in the blower set-ups in your car and a cobra. I am assuming you have a centrifugal.

The maf can be scaled in the tune, but it some work for a tuner to do. It may be cheaper to go ahead and buy a meter. also, whatever he is tuning with may not be capable of that i guess.

another thing to consider is, there are a lot of fake lightening meters out there. Same thing with the old 42lb ford green tops that haven't been made in years.
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