Pro-M MAF

Any one have used the PRO-M Maf??

Will it solve the problem of maxing out maf?

I would love to have a unit that outputs less hz than stock and tune around it...

mine is on the way.

Good to know... Lets see how it goes ;)

How much hp or cfm will it handle? 1700 cfm?

Not sure.. I think its 80mm

the cool thing is that it can be calibrated to send a lower Hz signal to the PCM and thus avoid the max out.. you can tune around it and have a nice tune that will work.

And let me guess, this thing costs an arm, leg, AND one of your jewels. :p Sounds very interesting indeed.

$250 for the MAF, and $299 for the f*rd_> gm converter (programable)

not cheap!!!!!

actually they told me they had one specifically for GM

Pro-M MAF + impedence converter = over half of what FAST costs!!!

We are still half way... jaja..


Anyways.. I heard that there are one or 2 people that solved the maf max issue in the pcm code... they just haven't released it.

shoooot. Ill have more in my stock PCM setup than my FAST setup (wideband stuff/impedence converter/MAF/maf converter)

highlander-
the first guy i spoke with said they had a GM MAF that woudl work, but he didnt have a effen clue what i was asking. I hung up, called back and got a diff guy that actually had a clue... he said this is the setup I need, and the converter box will come with a baseline curve programmed into it.

Do you actually need a new MAF to use their converter box? If I'm not missing anything, it almost seems like their recalibration box would work with the stock MAF to solve this.

All you have to do is use a MAFT.. which I do not know if exists for our cars.

Lets hope and see how this goes

The Pro-M converter box converts the 0-5V signal from their MAF to an AC frequency the GM PCM uses.

ditto what 96 turbo said, and it is also programable.

MAFT will not do it. the MAF stops at abotu 471g/sec which means that anything above that it will not be able to tell the PCM/MAFT etc that more air is coming in.

Is it capable of reading 900-1000 g/sec?

in what ways is it programable?

my guess is that it can take the 0-5 volt signal and vary the output frequency curve. I would assume that you would want to make sure it keeps the frequency close to but not exceeding the Hz that corresponds to 471gps during max boost (don't have tunercat open right now so can't tell what that is) That would allow the PCM to have a greater resolution for fueling.

Bill

Mine arrived today. Will advise on how well the tuning and dynoing goes.

Great... let us know

Stealth 2.. any updates?

Does anyone know what kind of wave is going back to the PCM, Is it a square wave or an AC sign wave. My car is not running right now, so I can't hook the old ocilloscope up to it. Looking at maybe making a circuit that can do the same thing but keep the stock MAF. If no one knows I'll have to hunt down someone with a running car locally. Thanks

Bill

In the process of mini-tubbing and redesigning blower ducting, so I haven't installed the Pro M yet. It'll be two more weeks.

Where can you buy the Pro-M Maf??? Size??? Is it much bigger than a ported stocker?

Yea, it's 100mm, so a 90mm tb might work best.

Where can you buy it?? Price??

I have an LT1 im not sure the size of the lt1s... THANKS

http://pro-flow.com/

449 is the cheapest to get that MAF?

$450 sounds right. I'm moving about 1000 g/sec, so it should really help. I'll let you know how my tuning goes, but it should work fine.

I take it you have a stock PCM... Nice power down on your sig ;)

yea, stock pcm.

I just hope frequencies can be lowered and are lower than normal so you can have a better resolution of fuel and "tune" around it.. tricks... but if it works as it should.. IM happy about it.

I don't like being on the forefront of this "idea." But, Pro M says it will work so . . .

do NOT trust pro-m! There stuff is good, but they dont have any idea what is going on as far as ls1/lt1 stuff goes. They speced mine out for me, and it was WRONG. I am going to send it back with DETAILED instruction on how I WANT it done, hopefully they dont try to use their brains too much :-/

What specs and what hapenned?

They tried to use their brains, instead of just listening to me.

I told them what I wanted, a 0-900g/sec maf with a 0-5v output.

they started asking me what injector sizes and ****, i tried to tell them it was irrelvalent.

Exactly... So it can be scaled up to what you want...

I thought the PCM saw Hz not volts? Let me know.. but its a good idea if the maf has that resolution...

WOuldn't it be beter to have a 0-1024g/s in a 0-5v resolution? that way you easily scale the inj constant in half and have full control over fueling.

it doesnt matter- because the MAF table will be 100% changes anyway(the response is different).

the PCM needs a freq input, but thats what a voltage to freq box is for :-D

So... You still need the box.... How much for the box???

The idea of a TEC 3 starts to get more interesting.

well, you can make one if you are cheap, or buy for 200-300ish.

Does anyone have any idea what the freq limit of our MAF's are? Or at what airflow they start to become inaccurate?

Bill

I prefer to buy unles its easy to make ;)

TTT

Originally posted by SMOKNZ
Does anyone have any idea what the freq limit of our MAF's are? Or at what airflow they start to become inaccurate?

Bill
An LS1 maf will only read around 450 g/sec.

The computer can only read up to a certain frequency output that the MAF puts out, which can be programmed up to 510 gps. Undoubtedly the MAF will continue to output a higher frequency the higher the airflow goes above this limit. How much higher is what I was inquiring. A frequency divider would take care of the Maxing signal to the PCM, requiring PCM table modification of course. Thats what I'm working on right now. Was just curious if maybe someone placed one of our MAF's on some sort of flowbench and plotted a freq output vs. CFM. Thats kinda my next step, to see if a flowbench or something can flow enough air to test a MAF.

Updates on this????

Pro M is installed, will dyno within a week.

Ok I'm confused. I understand that the stock MAF maxes out around 450 g/sec and that the PCM basically won't read any higher than that (correct?). By adding the new MAF to allow for boost, what do you do with the fuel tables under boost or do you use an FMU? And since you are using a stock PCM, did you get a higher rated MAP sensor? Does Tunercat or the like allow for modifying the fuel tables for higher MAP readings?

Not quite...

The idea of a bigger MAF like the PRO-m is that the maf will not max out at the same Hz as the smaller maf... hence you will have a shift in "resolution" that way you can have "metered" air and tune around it...

The pro-m has an output voltage of 0-5v and it needs a converter.. im not sure if the one for GMs has the circuitry in Hz output.. which was one of my main concerns.

Updates

the GM maf is still 0-5V out, you need the converter box. either make it, or buy it.

Well if you have the converter then you can make it lower Hz Output?

Anyone ever get one of these to work??

I have mine, but i have yet to install it... it comes with its own software AND converter... its really nice.. i could post pics if interested.

I have mine, but i have yet to install it... it comes with its own software AND converter... its really nice.. i could post pics if interested.

I'm interested. Are you trying to sell it?

Nope!

I know this is old but just wanted to see if anyone has the Pro-M MAF working? If so how well is it working,easy to tune..etc,etc...

thanks

i have it... not yet working... :D

Please post pics. Thank You, Tim