maf install success!!!!!!...so far
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so i read the thread posted below and was really interested in doing this conversion on my 951, so i bought a ford taurus MAF at first i followed the wiring that was posted by sweet9fourtyfour and i had some drivability issues the car was WAAAAAAY rich and had a dead spot where it was making no power. so i did some research and ended up removing the stock iat sensor since it wasnt needed...instead of using it like sweet9fourtyfour did. Car was still running very rich since the MAF was sending incorrect signal....so in order to get the conversion to work i made restrictor nozzels to mount in the MAF..see added pic. i made several sizes for tuning the car my dyno session is saturday and ill post before and after results since i dynoed it before doing the conversion.
also you need an air bypass in the intake tube somewhere post MAF.
i will post specific restrictor sizes and write up after i get the dyno results and see if this was a success...my butt dyno tells me it was!
here is the original thread
https://rennlist.com/forums/924-931-...-dyno-run.html
also you need an air bypass in the intake tube somewhere post MAF.
i will post specific restrictor sizes and write up after i get the dyno results and see if this was a success...my butt dyno tells me it was!
here is the original thread
https://rennlist.com/forums/924-931-...-dyno-run.html
Last edited by prossi; 11-22-2010 at 08:13 PM.
#2
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thats really clever putting a restrictor in there.
im curious though, how are you getting incoming air temperature to the DME? did you use the MAF's output signal for temperature in addition to the voltage output signal?
im doing the same thing to my NA with a contour maf but i have it wired right now to keep using the IAT because as far as i know the DME couldnt understand the MAF's temp signal.
also why do you need a bypass?
im curious though, how are you getting incoming air temperature to the DME? did you use the MAF's output signal for temperature in addition to the voltage output signal?
im doing the same thing to my NA with a contour maf but i have it wired right now to keep using the IAT because as far as i know the DME couldnt understand the MAF's temp signal.
also why do you need a bypass?
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Have you logged the AFR's in the upper rpms??
If it scales properly that is a good idea, similiar to changing sample tubes in the mustangs MAF.
If it is close you could use a piggyback to get it perfect. I am curious about the AIT sensor , I have in the past just used the factory AIT (I think it is between pins 1&4 on the plug). I then used a GM AIT as the resistance seems close.
If it scales properly that is a good idea, similiar to changing sample tubes in the mustangs MAF.
If it is close you could use a piggyback to get it perfect. I am curious about the AIT sensor , I have in the past just used the factory AIT (I think it is between pins 1&4 on the plug). I then used a GM AIT as the resistance seems close.
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If you use a MAF & AIT without making on-chip changes then your tune will drift with temp changes. This is due to 'double-compensation' being done for air-temp. One by the MAF itself, and the other by the DME.
Furthermore, the DME does more then just adjust fueling from the AIT signal input...
Not saying that either way won't work. However it will never be 'right' without making on-chip changes.
-Rogue
Furthermore, the DME does more then just adjust fueling from the AIT signal input...
Not saying that either way won't work. However it will never be 'right' without making on-chip changes.
-Rogue
Last edited by Rogue_Ant; 05-06-2009 at 05:19 PM.
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If you use a MAF & AIT without making on-chip changes then your tune will drift with temp changes. This is due to 'double-compensation' being done for air-temp. One by the MAF itself, and the other by the DME.
Furthermore, the DME does more then just adjust fueling from the AIT signal input...
Not saying that either way won't work. However it will never be 'right' without making on-chip changes.
-Rogue
Furthermore, the DME does more then just adjust fueling from the AIT signal input...
Not saying that either way won't work. However it will never be 'right' without making on-chip changes.
-Rogue
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the guage readings are VERY close to what i was getting with the stock afm
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My understanding is with a maf you don't need an ait due to the fact a maf reads the mass of the air which takes into consideration density and temp. Is this correct?
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IMO that depends on how close the AIT output on the MAF unit is compared to the factory unit.
Some MAF's don't have an AIT output at all and need the separate AIT.
However, it is a bit more complex than just that b/c the curve is dictated by the MAF output and "that curve " changes with AIT and the DME has to be properly mapped to keep it sorted properly. There is only one vendor at the moment that has that capability AFAIK. That is why most other units require a PB.
Some MAF's don't have an AIT output at all and need the separate AIT.
However, it is a bit more complex than just that b/c the curve is dictated by the MAF output and "that curve " changes with AIT and the DME has to be properly mapped to keep it sorted properly. There is only one vendor at the moment that has that capability AFAIK. That is why most other units require a PB.
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here are some more pics..i do plan on moving it to in front of the coolant tank where most aftermarket companies put them
Last edited by prossi; 11-22-2010 at 08:13 PM.
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Really, if the AIT scaling is similar then the best thing to do would be to flatten the AIT fueling on-chip. And use it as is.
-Rogue
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Furthermore, the altitude sensor needs to be taken out of the loop, or this compensation also zero'ed on chip.
-Rogue
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Didn't the guy that originally did this dyno the car and it made less power with the MAF and never ran correctly?...so why are you doing this? You NEED some sort of translator to convert the signals, otherwise it might run correctly in some places and not in others. Sounds like a good way to blow an engine.
That and you need to recirculate your BOV as you are losing metered air.
That and you need to recirculate your BOV as you are losing metered air.