Speed density vs MAF - Mustang Evolution

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Old 01-01-2014, 04:51 PM   #1
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Speed density vs MAF

I'm sure this has been answered 1000 times in the past but here I go anyway. I have a 88 GT with speed density I know that a MAF is better but why? Do I need to replace the engine harness or can I just add a 89+ ECU and splice my harness? I want a big cam I'm thinking a x303.


02 GT 5 spd. Best 1/4 12.28 @ 112mph
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Old 01-03-2014, 12:26 AM   #2
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MAF accepts the mods better than sd because maf calculates air flow/fuel requirements, sd uses a table of predetermined scenarios, so it changes based on air flow in steps. Think of sd as a set of stairs, and maf as an escalator. Also maf calculates earlier in the combustion process, I.e. prior to reaching the intake.

---------- Post added at 12:22 AM ---------- Previous post was at 12:20 AM ----------

You have to change computer and harness to 87-93, use a9l or a9p computer if you depending on trans type.

---------- Post added at 12:26 AM ---------- Previous post was at 12:22 AM ----------

You may want an x cam, but it may not be what's right for your set up. You have to build for a cam, you can't just go swapping cams and expect it to work perfectly. I.e. you need supporting mods, such as maf...going to an cam would be too much for sd to work right. I'm not sure of cams numbers, but sd only accepts mild mods.

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Old 01-03-2014, 10:37 AM   #3
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As far as what is needed and a How To
Backyard MAF Conversion
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