I'm gonna be having the coupe I've been building tuned soon. The guy whos doing it mentioned taking out the MAF. Thinking we might exceed the MAF's limits. I dont think we will but just curious how much PSI can be ran through before problems occur?

 

About 5 volts worth.

 

I've seen posts on my350z that assert somewhere in the neighborhood of 9psi. Check over there.

 

has anyone put a Z32 maf on a Z33 with an EB or EU. Z32 maf is good to ~550chp.

 

A MAF is just a translation device creating a voltage that is exponential to the grams per second air flow. Most MAF top out at 255 grams per second not because they cannot flow any more air just where the system is calibrated................a 3" pipe will have x resistance.........measure the pressure drop across the MAF and decide how much is acceptable.

My Q 77mm has a 7" W.C. drop at 7,000 rpm that 1/4 psi or 1.7% restriction.....[that's 176.6 feet per second air flow]...how much restriction is acceptable is the question in deciding upon the desired diameter of MAF...............too big and the idle and cruise RESOLUTION becomes to inaccurate.........balance game or except idle cruise problems.

For those engineers you can calculate the Mass Flow Choke point:
http://www.grc.nasa.gov/WWW/K-12/airplane/mflchk.html

The question is how many grams per second [or pounds per hour] of air is needed to create 1 HP? What is engine BSFC?