Tuning guys, question about MAF

99FiveOh

99FiveOh

15 Year Member
May 20, 2006
2,051
20
99
J-Ville, FL
#1
I've read that you don't always need a MAF cal'd for certain injectors if you get a tune. Is this true? Can a car be tuned to use the factory MAF with say, 42lb injectors?

Also, I have this ancient looking Pro M meter setup, it's 3 pieces and look like it would fit a fox setup. it's made of aluminum. I don't see any part numbers on it, it just say Pro M on all the pieces and there's no sensor in it. It looks like you'd put a stock sensor in it, not sure.
 
#2
also, if I need an actual "pro m" sensor, where can I get the sensor to put into the housing? Also, it takes the traditional Pro M style filter, the one with three studs on it. Where do I get one of those?
 
#3
A note about putting stock electronics in the Pro M housing - it fits but unless the housing is a 70 mm unit, the calibration would be off. I'm sure you can work around it with the MAF transfer but just expect to run a little lean if you do this without accomodation.

If you still have the blower, why not use a LMAF? I've seen them go used for 40 shipped.

Good luck.
 
#4
+1

You can use a stock mass air sensor with the 42's if you have a way to tune the computer for the injectors but the stock sensor will not be able to support the amount of airflow that a engine that needs 42lb injectors will flow. The bottom line is that if you need 42lb injectors you will need some sort of aftermarket maf. The lightning maf is a great choice if you gonna make no more than about 450 hp but it's not a direct bolt on. You'll need a late model maf wiring pigtail and I believe the flange is different. You can buy air filter adapters to use a clamp on filter for them though. I believe you can also buy a conversion harness for the wiring.
 
#5
i think most people who talk about getting a new mass air meter are really talking about getting a new housing for the mass air meter sensor, but still using the stock sensor. in that case, the stock sensor is simply transferred from the original housing into the new housing.

i don't know much about the pro-m housing, but if it is just the housing without the actual sensor in it, and the stock sensor fits in there and the 2 bolts on either side line up and fit, i would bet that is it is designed to be used with the stock mass air meter sensor.

to answer the other question though, you can use it with any size injectors, so long as you get a tune that tells the computer how to read the voltage the sensor puts out and the size of the injectors.

the whole thing about getting a meter calibrated for certain injectors is for people who want to change the meter housing and the injectors without having to get a tune. in that case, the meter and the injectors fool the computer into thinking there are stock pieces in place.

i hope that helps ...
 
#6
I'm just planning for the future. I'm planning a turbo setup. I have some parts laying around that don't really fit my goal, so I could get these sold and bank the cash to get what I really need.

I identified my mass air housing, it's a 3 piece ancient Pro M 77mm. It looks like a bell. From what I'm seeing, this thing is worth good money. I'll sell it and score a lightning MAF. As for the plug, is there any other ford vehicle I can take it off of? My brother works at a salvage yard so I may be able to get it there.
 
#7
I think any 99 up mustang uses the same plug but I'm unsure. In a turbo setup if the maf is going to be blow through it is going to peg much faster than it will if it's draw through. Check and see if the turbo kit your gonna use is set up for a draw through or blow through maf before making a desision on a maf. A lightning maf on a blow through app. will be maxed out at roughly 375hp. So if it it's a blow though setup you'll probably want to go a different route.
 
#8
BlackVert said:
i think most people who talk about getting a new mass air meter are really talking about getting a new housing for the mass air meter sensor, but still using the stock sensor. in that case, the stock sensor is simply transferred from the original housing into the new housing.
Click to expand...

Could be some truth in that :nice:

If you look at it from C&L's perspective :crazy:

But ProM's are setup with electronics and housing as a unit when they
flow the meter.

Also ... you see some of the time ..........

Peeps trying to put the electronics from one OEM meter in the housing of
a different OEM meter :shrug:

Grady
 
#11
I'm not buying a kit, I"m gonna build it myself. Kits are overly priced and you have to install it "their" way. One of the reasons why I want to do a turbo is the price, DIY kits can be done for alot less than Supercharging.
 
#12
Very true! If I'm right you wont be able to vent the blow off valve to the atmosphere with the draw through maf. I haven't done tons of research on that kind of stuff though. Which turbo are you planning on using a MP T70?
 
#14
rj95svt said:
Very true! If I'm right you wont be able to vent the blow off valve to the atmosphere with the draw through maf. I haven't done tons of research on that kind of stuff though. Which turbo are you planning on using a MP T70?
Click to expand...

A cheap one..LOL! Any suggestions on a nice entry level turbo that won't break the bank? I have someone who will fab up the entire hot side for 600 bucks. This guy knows his stuff, he has a later model Honda civic with a 5.0 Turbo in it! He converted it to all Mustang driveline and rear drive. I'm sure he can run my turbo pretty easily.
 
#16
5.0 turbo ricer!!! Now that is a sleeper.

Check out a masterpower T70. It's not actually a 70mm turbo but alot of people run them on stock bottom end 5.0's and make good powerand they are pretty cheap at about 500 dollars new. They are easily good for 500hp. People on ebay sell what is called a super T70 but I think I would steer clear of them as they are not actual master power turbos. Check out this website it was turbo mustangs but they changed the name. Everything you want to know about turbos are on this site.

http://www.theturboforums.com/smf/index.php
 
#17
I post on that site, but if you don't have a doctrine in turbo engineering, they won't answer your questions, if they do answer, it'll be some kind of sarcastic BS, like "do a search!" Which I do, but hardley ever find anything.
 
#18
Yeah unfortunatly that is the problem with that site. They have a wealth of information on the site but alot of the members are a** holes. It is deffinatly not a community like this one. I recomend reading and searching their forum but honestly I have never posted on there because of the way they treat a newbie. I have noticed that if you explain that you tried searching before asking alot of times they will point you in the right direction. Good luck with your project. It sounds like a fun one.
 
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