What's the realistic MAX for a MAF w. FI?
 

My question is relatively simple - I'm curious what the realistic max you can feed through a stock (or aftermarket) MAF and still have the car function right. I'm planning on going with a D1 Procharger, but a SD tune won't work so well where I live (Altitude is between 5,000 and 12,000, temperature differences between -10 and 105 through the year, sometimes almost on the same day), so I'm trying to avoid that (or having to swap tunes constantly).

you can do 500whp on a stock maf.

I'm curious of results with the ABACO mafs or anything similar.

A SD tune will compensate for changes in altitude and temperatures infinitely better than a MAF based tune.

A MAF limit to read is around 8lbs of boost depending on the setup.You can tune a car over 1000rwhp with a stock MAF being used.

Finally someone that knows what he is talking about..I have gone thru this debate many times, My old set up, 383 LT1 stock maf went 648 RWHP on pump and 722 RWHP on the fast gas. A/F was always spot on..

:search: I swear this topic comes up as much as the "how much boost can a stock LS1 take" :bang:

I got so many different responses I wasn't sure what to believe - hence starting my own discussion :)

every post I've seen about them says that they don't - can you explain more? My understanding was that they don't play well with major temperature changes, which prompted my initial question. I've certainly seen tons of posts around here that say as much.
edit: Ok, if temp/etc aren't an issue, then what ~are~ the limitations of SD tuning? I'm in an emissions state, FWIW.

A 1" MAF will max out at 150 hp. a stock 75mm MAF will max out at 500 rwhp. A stock 85mm maf will max out around 600 rwhp. A 100mm MAF will max out around 750~ rwhp.

Your limit in the PCM is 512 g/sec, and 12k hz.

Larger maf housing= higher ceiling.

Take that info and use it to your advantage ;)

Your 1 code you are allowed to throw will be the MAF fail code.

we don't get to throw ~any~ codes. >_<

512 g/sec is still 512 g/sec no matter how big or small the MAF is. That is a unit of volume per time. Only thing that will change is the velocity at which the air is flowing thru the different sized MAFs if they are flowing the same amount of volume per second.

So what you are saying is that MAFs are limited to certain VELOCITIES rather than VOLUME? :confused:

85mm MAFs from TRUCKS max out MUCH sooner than our stock F-body MAF. I maxed one out last week with a H/C car that made 442rwhp on the dynojet that I tune on.

You can operate in maxed-MAF territory, but you will get WOT AFR swings that are dependent on the outside climate.

If your tuner uses HPTuner's, you CAN run totally SD WITHOUT FAILING THE MAF. Yep, not a single code. I would suggest you ask your tuner up front if he is SURE that he knows how to do this.

Really? Hmm... that would solve it, if my guy knows how.