Which computer for maf swap
Posting Guru
Joined: Sep 2008
Posts: 2,379
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I realize it wouldn't be ideal but wouldn't a calibration tube work with these MASS Air computers or does this year not support that?
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
Calibration tube can only do so much.
You'll be flowing so little over the maf (at idle) that it will still need tuning to run right. Especially at idle. 24lb injectors you can get away with a cal tube, 42s are a bit much.
You really should get a custom chip for it anyway. With all the parts combined, you can extract so much more hp. And the a9l is programmed for a car that's at least 1000 lb lighter.
It will be in your best interest to get it Dyno tuned.
You'll be flowing so little over the maf (at idle) that it will still need tuning to run right. Especially at idle. 24lb injectors you can get away with a cal tube, 42s are a bit much.
You really should get a custom chip for it anyway. With all the parts combined, you can extract so much more hp. And the a9l is programmed for a car that's at least 1000 lb lighter.
It will be in your best interest to get it Dyno tuned.
Posting Guru
Joined: Sep 2008
Posts: 2,379
Likes: 2
Calibration tube can only do so much.
You'll be flowing so little over the maf (at idle) that it will still need tuning to run right. Especially at idle. 24lb injectors you can get away with a cal tube, 42s are a bit much.
You really should get a custom chip for it anyway. With all the parts combined, you can extract so much more hp. And the a9l is programmed for a car that's at least 1000 lb lighter.
It will be in your best interest to get it Dyno tuned.
You'll be flowing so little over the maf (at idle) that it will still need tuning to run right. Especially at idle. 24lb injectors you can get away with a cal tube, 42s are a bit much.
You really should get a custom chip for it anyway. With all the parts combined, you can extract so much more hp. And the a9l is programmed for a car that's at least 1000 lb lighter.
It will be in your best interest to get it Dyno tuned.
So I'll throw in, if you are going to do it, do it right and get a slot style sensor. The idle will be MUCH smoother and so will the acceleration due to the newer technology in the sensor. And if you don't already have injectors, I have heard the Siemens 60 lb injectors are really good. Not because of the size but because of the responsiveness of those injectors and how they are built. I'll need larger injectors (probably 42s) but I'll get the Siemens.
Senior User
Joined: Oct 2007
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The 42lbers have been removed and replaced with the stockers for the time being. So I can try and figure out this SEVERE flooding issue. Which could possibly be related somewhat to the bad pcm i have now. Once I replaced my pcm with my buddy's it seem to run fair but still smoking like a freight train. I know I need to get it tuned but I have to get it semi driveable and not flood out fouling plugs first lol
Lead Driver
Joined: Jul 2007
Posts: 7,868
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From: Rhode Island
You need to verify 100% that you have all the injector wiring correct and put into the correct pins on the computer connector.
If it's still has black smoke coming out of the tailpipe and the wiring is correct, there is a sensor somewhere not doing its job correctly. If the MAF is known good, I'd start with the ECT sensor.
If it's still has black smoke coming out of the tailpipe and the wiring is correct, there is a sensor somewhere not doing its job correctly. If the MAF is known good, I'd start with the ECT sensor.
Posting Guru
Joined: Sep 2008
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The 42lbers have been removed and replaced with the stockers for the time being. So I can try and figure out this SEVERE flooding issue. Which could possibly be related somewhat to the bad pcm i have now. Once I replaced my pcm with my buddy's it seem to run fair but still smoking like a freight train. I know I need to get it tuned but I have to get it semi driveable and not flood out fouling plugs first lol
Logistics Pro
Joined: Jul 2009
Posts: 3,635
Likes: 3
From: Lansdale, PA
42lb injectors are way more then needed. They will support 550whp easy. 60s are up into the 700-750 range. These old computers don't have the fine adjustment like a newer eec5 computer. You'll be altering the dwell and saturation times and whatever else they call the adjustments to get idle correct. I liked the Siemens 60s I put in the lightning and cobras I've worked on. They did tune very nicely but it was needed on those vehicles. I really think a set of 30s will be plenty for you but I like the safety of 42s and then you won't need to upgrade later if you decide to do more work.
When you get up into the 350-375 hp range it's always good to get Dyno tuned.
When you get up into the 350-375 hp range it's always good to get Dyno tuned.
Senior User
Joined: Oct 2007
Posts: 111
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If only the closest tuner wasnt 4 hours away that'd be beneficial. I'd love to tow it to dynospeed racing where I have all my tuning done but that would break the bank on towing.
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Posting Guru
Joined: Sep 2008
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I kind of figured you were going to say you are too far away.
Posting Guru
Joined: Sep 2008
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I have the tweecer-rt but haven't used it much yet. The guy who is going to tune my truck prfers quarterhorse because of the way it does things to the computer. He said it was easier to configure for data logging and the way it writes and reads is faster than the tweecer. I am not sure these are really reasons to choose one or the other but I've heard more about quarterhose than tweecer. I also noticed on the tweecer web site it doesn't list any major companies as their competition because I don't think they have much of a leg up. I still think I'll be happy with the tweecer after I get the base tune and start making my own adjustments.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Yeah, that's why nothing is working right. You can't just mix and match EFI parts without tuning anything.
If you can't/don't want to tune your truck, you need to get a stock Mustang 5.0 MAF. It'll still choke your motor and make it run lean up top.
If you can't/don't want to tune your truck, you need to get a stock Mustang 5.0 MAF. It'll still choke your motor and make it run lean up top.
Posting Guru
Joined: Sep 2008
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bearster18-
you wanna be realllllllllllllllllllllllllly careful here. I was troubleshooting my motor after the SD to MAF conversion and it was running really crappy (not tuned right). Then, ALL OF THE SUDDEN, a reading must have been measured my the sensor and almost caused my engine to blow up. I think what saved it was me getting to the key and turning it off quickly.
you wanna be realllllllllllllllllllllllllly careful here. I was troubleshooting my motor after the SD to MAF conversion and it was running really crappy (not tuned right). Then, ALL OF THE SUDDEN, a reading must have been measured my the sensor and almost caused my engine to blow up. I think what saved it was me getting to the key and turning it off quickly.