Supercharged 02 Sport

[justin146]

The lightning MAF is calibrated however for 42# injectors.

The Lightning meter is not calibrated for any specific injector. No OEM MAF's are calibrated. The exact same meter is used in the 03/04 Cobras with 39lb injectors.

 

[jah81592]

Usually the failures are in the opposite direction. People using return (gerotor) pumps on returnless (turbine) vehicles. Focus pumps have been known to be temperamental though.

Rocket, I never stated that I would even think of using a Walbro style in a returnless system. They just will plain fail due to thier inability to be pulse width modulated. But I have tuned several 'Stangs with return style systems and Focus pumps and my truck has a return style system and the Focus pump just doesn't like to be run in a return style system(wear is premature). As stated earlier there are no checks to hold the fuel which is drained back to tank after sitting and the problem list goes on with a return style system,which is why I swapped to the Walbro. This isn't just with mine either. These problems followed with all of my custom tuning customers which were using the Focus pump as well. The Focus pump has a place and in a return style environment isn't where it is at. All of this can be verified through SCT as well. They dont recommend using a Focus pump in a return style they always recommend using a properly sized walbro. Yes a Focus pump can be run in a 100% duty cycle but not highly recommended because it was never designed for that!

 

[wpurple]

Does a Focus have a return system or returnless?

What is the lph of a focus pump?

 

[kabukie]

Does a Focus have a return system or returnless?

What is the lph of a focus pump?

im pretty sure its a return system and the X is a returnless system.

**UPDATE** Kinda broke right now... someone stole my cc number online and charged a bunch of stuff so im out $300. Hopefully the bank gets their heads out of their ***** and gives me my money back. So im gonna postpone the fuel pump and stick to MAF and injectors. Then go from there. the damned check engine light is getting on my nerves and i want to get this thing tuned asap. dyno tune and xcalibrator will run me about $500... that I dont have =(

 

[wpurple]

Your bank should take care of everything for you and you will not have to worry about any charges.

 

[stang99x]

The Lightning meter is not calibrated for any specific injector. No OEM MAF's are calibrated. The exact same meter is used in the 03/04 Cobras with 39lb injectors.

That is just plain wrong. Every meter is individually calibrated for its individual injectors. 5.0 mustangs are calibrated for 19# injectors, 93-95cobras for 24# injectors, lighting pickups for 42#s, and so forth. you stack a bigger maf made for different injectors on your motor and see what happens. The 88-93 5.0 mustang MAF will work on the 4.0OHV motors though since they both use 19# injectors.

I suggest you check this link:
http://www.diablosport.com/index.php?module=htmlpages&func=display&pid=4
and read about the MAF extender. I am suprised someone with a turbo doesn't know this information.

[edit]I can't even stop there. I just can't see how you could say something so wrong with the application you have. If what you said was true, then there would be like a total of 6 ford MAFs ever made, varying only by diameter. Instead there are literally hundreds of them, each made for its own individual application. If you're working on the peter principle (dazzle them with brilliance, baffle them with bullshit) then do it with something of your own and not someone elses engine. Before reading this, I would personally have taken some of your advice seeing as you had a custom remote turbo setup. Now, I wonder if you know the difference between a bowtie and a blue oval

 

[performancenut]

That is just plain wrong. Every meter is individually calibrated for its individual injectors. 5.0 mustangs are calibrated for 19# injectors, 93-95cobras for 24# injectors, lighting pickups for 42#s, and so forth. you stack a bigger maf made for different injectors on your motor and see what happens. The 88-93 5.0 mustang MAF will work on the 4.0OHV motors though since they both use 19# injectors.

I suggest you check this link:
http://www.diablosport.com/index.php?module=htmlpages&func=display&pid=4
and read about the MAF extender. I am suprised someone with a turbo doesn't know this information.

[edit]I can't even stop there. I just can't see how you could say something so wrong with the application you have. If what you said was true, then there would be like a total of 6 ford MAFs ever made, varying only by diameter. Instead there are literally hundreds of them, each made for its own individual application. If you're working on the peter principle (dazzle them with brilliance, baffle them with bullshit) then do it with something of your own and not someone elses engine. Before reading this, I would personally have taken some of your advice seeing as you had a custom remote turbo setup. Now, I wonder if you know the difference between a bowtie and a blue oval

Sorry, I agree with Justin. Newer MAF meters are indeed not "calibrated" for a certain injector size. If you read more about transfer function, then you may be able to develop a better understanding. This is a common misconception that is prevalent on numerous sites involving performance modification. I wish not to argue, rather to give positive input in a good thread of discussion.

 

[stang99x]

Well then, you'd better get justin on the phone with you when you conference call Ford and tell them. I mean, FMS is who I talked to when I started my project and I would assume they knew what they were talking about vs anyone else. We happen to have quite a few large FMS dealers here in Atlanta, so if you know something they don't, I'd sure like to know

Also, all the vehicles we are talking about here aren't "new" My 2005 Aviator still has a typical MAF on it, so I assume you'd be talking about 2006 and up

 

[performancenut]

Well then, you'd better get justin on the phone with you when you conference call Ford and tell them. I mean, FMS is who I talked to when I started my project and I would assume they knew what they were talking about vs anyone else. We happen to have quite a few large FMS dealers here in Atlanta, so if you know something they don't, I'd sure like to know

Also, all the vehicles we are talking about here aren't "new" My 2005 Aviator still has a typical MAF on it, so I assume you'd be talking about 2006 and up

OK, smart guy. Glad you know it all.

 

[Turdle]

Maf?? Calibrate??

 

[wpurple]

I don't see how a MAF can be calibrated; it is just a dumb sensor...in the sense that it just gives a voltage to the PCM as air flows thru it.
Yes, there are different size MAF's, but it just means different #'s of air gives different voltage readings. It is up to the PCM to use the look up tables to determine fuel and timing based upon the voltage the MAF tells it.

...Just thinking out loud here.

 

[Turdle]

Well
Pmas wants 100 bux to re-calibrate my pro-m big mouth

I also have a maf tuner box, which is supposed to do a crude form of this when you change injector size.

My maf is calibrated for 36's and I'm running 42's with the maf tuner

Also, I might add, they are calibrated for the type of filter which is upstream.

I read an article in Hot Rod about 3 years ago, which was titled "HOW MAFS WORK" . They went thru the whole process of how they were made and calibrated.there were 266 different calibrations for FORD ALONE!!
not only that, they showed how a simple elbow placed upstream of the maf can pollute the signal by 20 percent or more.
This is a trickier subject than you guys think.

If a 42 lb injector is on for an hour, it will pass 42lb of fuel
a 24 will pass 24 lbs

so, when the maf calls for a 2 milisecond pulse--you bet your but the calibration makes BIG difference.

 

[Turdle]

I don't see how a MAF can be calibrated; it is just a dumb sensor...in the sense that it just gives a voltage to the PCM as air flows thru it.
Yes, there are different size MAF's, but it just means different #'s of air gives different voltage readings. It is up to the PCM to use the look up tables to determine fuel and timing based upon the voltage the MAF tells it.

...Just thinking out loud here.

They calibrate them by sandblasting a film resistor to the proper signal, with a very small pen style sandblast wand

 

[wpurple]

so do I assume that not all same MAF are the same? In other words a 80mm can be calibrated for different injector sizes?

 

[Turdle]

so do I assume that not all same MAF are the same? In other words a 80mm can be calibrated for different injector sizes?

yup
ok
here are some on ebay

read the descriptions---why are they for different calibrations if not calibrated?
http://search.ebay.com/pro-m-maf_W0...QQsatitleZproQ2dQ20mQ20mafQQssPageNameZRC0021

and this
notice far left tab on home page

http://www.massairsystems.com/

 

[justin146]

That is just plain wrong. Every meter is individually calibrated for its individual injectors. 5.0 mustangs are calibrated for 19# injectors, 93-95cobras for 24# injectors, lighting pickups for 42#s, and so forth. you stack a bigger maf made for different injectors on your motor and see what happens. The 88-93 5.0 mustang MAF will work on the 4.0OHV motors though since they both use 19# injectors.

I suggest you check this link:
http://www.diablosport.com/index.php?module=htmlpages&func=display&pid=4
and read about the MAF extender. I am suprised someone with a turbo doesn't know this information.

[edit]I can't even stop there. I just can't see how you could say something so wrong with the application you have. If what you said was true, then there would be like a total of 6 ford MAFs ever made, varying only by diameter. Instead there are literally hundreds of them, each made for its own individual application. If you're working on the peter principle (dazzle them with brilliance, baffle them with bullshit) then do it with something of your own and not someone elses engine. Before reading this, I would personally have taken some of your advice seeing as you had a custom remote turbo setup. Now, I wonder if you know the difference between a bowtie and a blue oval

sorry to tell you this, but the MAF on NS95 Mustang GT's(19lb) and Mustang Cobras(24lb) are the exact same meter. This is true for all V8 Mustangs up to '02- The Cobra meter is the same as the GT meter from the same year. The meter in the '03 Cobra (39lb) and '03 Lightning (42lb) are the same meters. The difference is in the programming of the computer controlling them.

Calibrated MAFs only exist in the aftermarket. The link you posted is for a device that just keeps your meter from pegging soon by ramping the voltage.

I am glad that you are trying to test my knowledge; but you need to get your facts straight first. Here is a good read for you.. http://www.mustangworks.com/articles/electronics/InductionBlues.html

 

[Turdle]

sorry to tell you this, but the MAF on NS95 Mustang GT's(19lb) and Mustang Cobras(24lb) are the exact same meter. This is true for all V8 Mustangs up to '02- The Cobra meter is the same as the GT meter from the same year. The meter in the '03 Cobra (39lb) and '03 Lightning (42lb) are the same meters. The difference is in the programming of the computer controlling them.

Calibrated MAFs only exist in the aftermarket. The link you posted is for a device that just keeps your meter from pegging soon by ramping the voltage.

I am glad that you are trying to test my knowledge; but you need to get your facts straight first. Here is a good read for you.. http://www.mustangworks.com/articles/electronics/InductionBlues.html

Justin you are partially correct.
Fact is, the tuners find it EASIER to program thru the pcm using a stock maf--rather an aftermarket maf-if truth be told.

Doug himself said it in a post--I just cannot find it.

 

[Turdle]

And, to make it easier for everyone
If you are wondering why I have a 36lb maf and42 injectors, with the maf tuner--
well, it is because the guy who sold it to me was as confused as us lol

 

[jah81592]

Pro-M Calibrated meters are junk,that is coming from a SCT certified custom tuning dealer.

 

[stang99x]

sorry to tell you this, but the MAF on NS95 Mustang GT's(19lb) and Mustang Cobras(24lb) are the exact same meter. This is true for all V8 Mustangs up to '02- The Cobra meter is the same as the GT meter from the same year. The meter in the '03 Cobra (39lb) and '03 Lightning (42lb) are the same meters. The difference is in the programming of the computer controlling them.

Just left ford, since I had to drop off the aviator for a service call. Parts says you're wrong. I agree with parts. Now, I do know that you can use any 19# calibrated maf with any 19# injected vehicle (ford to ford) For instance, a town car maf with work on an X. However, as I have stated and Ford has confirmed, an MAF for 24# injectors will not PROPERLY function on a 19# injected engine. The MAF would send excess voltage and excess fuel and you'd run rich, and vice versa the other way round.

I should know from the mustangs as well, as I have tried a 19# MAF on a 24# injector. Nothing but problems when I did it with idle quality. Bought the FMS 24# MAF and idle was instantly corrected. I don't think there is a tuner out there worth his salt that will agree with you, and I know Ford says you're wrong, so how can you make the statement that you're right?

Also, I have played with excess tubing and long run intake pipes. Takeing my current setup with just a 90` elbow in front of my supercharger, idle MAF voltage is around .92 Add several feet of piping to run down to the front end and get a true cold air style intake, idle MAF voltage surges to 1.14 or so. These MAF are extremely finicky and using the wrong one without being able to read voltages will cause CEL lights and poor performance. And just for curiousity's sake, which MAF are you running?