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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 12-19-2007, 09:55 AM   #1
lmatt
 
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Default What MAF for 30lb injectors

Trying to tune a 90 5.0. I have put in 30 lb injectors and still seem to run lean. I have had a buddy of mine tell me that the MAF is wrong for the injectors. What is or would be the correct one for these injectors? Thanks
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Old 12-19-2007, 10:37 AM   #2
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Default RE: What MAF for 30lb injectors

well first off what combo do you have? and pro m makes the best meters
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Old 12-19-2007, 12:24 PM   #3
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Default RE: What MAF for 30lb injectors

Sorry, got busy. I have windsor jr heads 1.94/1.60 valves
1.72 roller rockers
30 lb motorsport injectors
cobra upper and lower intake
3.73 ring and pinion
5spd trans
2 1/2 inch exhaust with shorty headers h-pipe and flow's
stock a9l computer- For now. Looking into a tune.
Will get the motorsport # off of the MAF.
65mm throttle body
no egr spacer
e303 cam



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Old 12-19-2007, 12:26 PM   #4
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Default RE: What MAF for 30lb injectors

What mass air do you have now and 30's seem a lil big for your mods.
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Old 12-19-2007, 12:51 PM   #5
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Default RE: What MAF for 30lb injectors

agreed 24s would have more than sufficed
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Old 12-19-2007, 01:44 PM   #6
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Default RE: What MAF for 30lb injectors

I have part # m-12b579-a70 MAF sensor. I was having problems running VERY lean and burning valves. Thats why someone suggested to put the 30's in.
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Old 12-19-2007, 02:03 PM   #7
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Default RE: What MAF for 30lb injectors

was the car tuned properly?
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Old 12-19-2007, 02:36 PM   #8
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Default RE: What MAF for 30lb injectors

Quote:
ORIGINAL: Jasperstang308

was the car tuned properly?
tuned for what? just having heads?
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Old 12-19-2007, 02:44 PM   #9
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Default RE: What MAF for 30lb injectors

Walbro - Mass Air Flow Sensors
Here is a good place for reference.
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Old 12-19-2007, 04:45 PM   #10
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Default RE: What MAF for 30lb injectors

It should not matter what MAF you're running if you get a tune on a chip, the correct way to use larger injectors is with the tune telling the computer what injectors you have as opposed to getting a "calibrated" MAF.
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Old 12-19-2007, 04:45 PM
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