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CEG\'er
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CEG\'er
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What the hell here goes...
A 99-00 Lightning has 80 MM Mass Air unit.
A 01-04 Lightning has 90 MM Mass Air unit.
Both programmed for 42 # Injectors.
Both Lightning units tend to peg at around 450-500 RWHP/550-600 CHP.
And I agree and disagree with the Hp factor. I agree with
the fact that is not number specific, however around a certain hp range, certain MAF's do peg out. But the increased hp numbers are usually credited to increased boost levels, which increase the amount of CFM coming in. And more boost usually means more heat. The quality of your air has a large factor in the voltage IMO. Which greatly affects the maf and it's voltage.
You can tune around hitting 5 V but with what is available out there you really don't have to anymore (on other SVT products).
They make MAFextender's. So if for some reason you are seeing 5 volts you can add this without having to spend big $$$ on a MAF that does not see 5 Volts at a certain HP. Mafextenders are a great compromise, however I can not vouch if they will work on a 'Tour. But would imagine so.
There is also a few company's that offer aftermarket MAF's. Once again, I do not know if they will work on a 'Tour but I know they have them for several ford products, so I do not foresee that it wouldn't work, but who knows. Needless to say, I can not imagine that you should have to worry to much about pegging a Lightning Maf, but kudos to ya if you do in a 'Tour!
But as usual, probably none of what I said matters, because this is a contour and nothing seems to work on these cars without a lot of custom work.
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Hard-core CEG'er
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Originally posted by Smokeshow:
What the hell here goes...
A 99-00 Lightning has 80 MM Mass Air unit.
A 01-04 Lightning has 90 MM Mass Air unit.
Both programmed for 42 # Injectors.
Both Lightning units tend to peg at around 450-500 RWHP/550-600 CHP.
And I agree and disagree with the Hp factor.
Outside of the years everything else is incorrect.
The MAF's are NOT calibrated for injector sizes. Injector sizing is done via PCM code. MAF's are calibrated on a flowbench.
Rating a MAF by HP is not very accurate as well. They are calibrated by kg/hr flow on a flow bench. Multiple variables can effect what kg/hr flow equates to what HP level.
The MAF functions of all Lightning MAF's all available so anyone can know their kg/hr limit before the MAF pegs. No reason to guestimate a HP limit when you have the actual hard data to use.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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CEG\'er
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CEG\'er
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Really now, why does every major manufactor the makes MAF's ask to program them to specific injector size?
This is the greatest forum 3v3r!
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Joined: Sep 2000
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Originally posted by Smokeshow:
Really now, why does every major manufactor the makes MAF's ask to program them to specific injector size?
This is the greatest forum 3v3r!
That's very simple.
The reason is they tailor the MAF calibration of the MAF meter to make the injector size change because a MAF manufacturer can't re-program your PCM. 
It's called HACK tuning. It's a sloppy way to tune but it's been done for a long time. After all look at FMU's... 
The OEM MAF's have no need to be programmed in this fashion because the "factory" can simply just program the correct injector sizing information into the PCM code. Therefore you get an accurately calibrated MAF and it's matching MAF function programmed into the code.
Next time you try to be smug and a major smart ass you should probably know what the hell you are talking about. 
Now you just come off as even more of a dumb ass. 
...and to answer your next question; "yes" I'd rather be a jerk then a dumb ass. You just happened to catch me on a bad week to boot. (call me MR. E-Thug!)
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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CEG\'er
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CEG\'er
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So why don't they leave it blank and leave the customer to tune around it?
I would continue this one side on slaught. But there is no point... Yes, you have made some valid points.. but you stand where you stand.. and there is no convincing anyone on this forum of anything I ever say. I could say that Henry Ford found FoMoCo. And I would get flamed.
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Greg are you saying that a specific vehicles factory MAF is not calibrated for X size injectors that come in the car and that the injector size is programmed into the PCM and it does whatever it does? Say for example if I was going to put 24# in my car, and I added a say a 96-98 or Mark VIII MAF to corralate (sp?) with the injectors.....would that work? Or is my thinking wrong? Originally posted by DemonSVT:
Originally posted by Smokeshow:
Really now, why does every major manufactor the makes MAF's ask to program them to specific injector size?
This is the greatest forum 3v3r!
That's very simple.
The reason is they tailor the MAF calibration of the MAF meter to make the injector size change because a MAF manufacturer can't re-program your PCM.
It's called HACK tuning. It's a sloppy way to tune but it's been done for a long time. After all look at FMU's...
The OEM MAF's have no need to be programmed in this fashion because the "factory" can simply just program the correct injector sizing information into the PCM code. Therefore you get an accurately calibrated MAF and it's matching MAF function programmed into the code.
Next time you try to be smug and a major smart ass you should probably know what the hell you are talking about.
Now you just come off as even more of a dumb ass.
...and to answer your next question; "yes" I'd rather be a jerk then a dumb ass. You just happened to catch me on a bad week to boot. (call me MR. E-Thug!)
Ryan
Trollin!
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CEG\'er
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That is what I was going to say.. but I figured it would just start another flame war attack on me...
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Posts: 2,454
Learned patience the hard way
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Learned patience the hard way
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Ryan,
Technically I beleive the MAF would function in reading the 24# injectors, but actually getting your computer to correctly "talk" to the MAF from another car is something else.
Rick
Owner of 00 #1611 Silver (Totalled) 98.5 T-Red SVT #6180
Buckshot77@msn.com
Misc 3L parts for sale
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Redneck Troll
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Redneck Troll
Joined: Jun 2000
Posts: 2,621 |
Originally posted by RTStabler51:
Greg are you saying that a specific vehicles factory MAF is not calibrated for X size injectors that come in the car and that the injector size is programmed into the PCM and it does whatever it does?
Say for example if I was going to put 24# in my car, and I added a say a 96-98 or Mark VIII MAF to corralate (sp?) with the injectors.....would that work?
Or is my thinking wrong?
I'll tried to dumb it up as much as possible... No offense to you or anyone else...
Your thinking is wrong. MAF tables are made up of calculated values of air that pass through the MAF at certain transfer voltages on a flow bench. These MAF tables are engineer set values in the ECU once they are figured out on the flow bench. Now, with those known flow numbers, engineers can make calculations on the intended engine size, cam duration, intake volume, intended load, etc. etc. etc. to make a base calculation in the ECU before heading to an engine dyno. For X amount of air, you will need Y amount of fuel from your Z sized injectors. (there are also many variables to calulate load too, but they're all based off of this very basic principle of air and fuel)
You change the size of the injectors, you have to make changes somewhere in that A/F equation. The way the MAF guys make their changes to "tune" for larger injectors is by adding resistance to the transfer circuit. Instead of needing Y amount of fuel for X amount of air, the MAF tells the ECU that it's getting the original amount of air minus a percentage increase in injector size. X becomes .8X amount of air, requiring only .8Y amount of fuel, from 1.2Z sized injectors.
One MAF that came on a car with 24# injectors does not have to equal another MAF that came on another car with 24# injectors, electronically or in physical size.
http://www.bnmotorsports.com
"And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."
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Makes sense, thanks for the reply! 
Ryan
Trollin!
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