What is a SD and how is it better than a MAF ?
I'm gonna add my .02 before this one gets ugly cause it will.
If you have a dedicated tuner to getting your tune exact and honestly taking twice the amount of time to do so a Speed Density tune is the way to go. Think of it as a Subway foot long made exactly for your car.
A MAF tune is one that will work just fine, but it may be leaving some performance on the table since it is allowing the MAF to make changes to your tune as it see's fit through changing temps, air flow, etc.
My honest opinion, mildly built primarily street car = MAF / weekend warrior and beyond = SD
If you have a dedicated tuner to getting your tune exact and honestly taking twice the amount of time to do so a Speed Density tune is the way to go. Think of it as a Subway foot long made exactly for your car.
A MAF tune is one that will work just fine, but it may be leaving some performance on the table since it is allowing the MAF to make changes to your tune as it see's fit through changing temps, air flow, etc.
My honest opinion, mildly built primarily street car = MAF / weekend warrior and beyond = SD
All new Mopar Hemi's still use SD to this day (IIRC). My 06 SRT8 300 was anyway and that thing was so snappy around town. My .02 
My C6 will also get a SD tune to get rid of the restrictive 85mm MAF after 500rwhp-
My C6 will also get a SD tune to get rid of the restrictive 85mm MAF after 500rwhp-
