Bottom Line With Mass Air Meters

[gtsr515]

I have tried several MAF sensors, and all worked fine as far as driveability and an increase in performance, actually I ran fastest with a basic C&L, I know that Pro-M's are "calibrated" v.s. a sample tube, what in your opinion other than what I've stated makes one better than another?

And I don't feel I need to list my mod's as they all are proven and work fine, I'm not having problems, just curious, do you?

[Unit 5302]

Here is the current babble flying around.

The C&L 76mm MAF is the hot ticket. It seems to be making more power than the Pro-M 77mm MAF.

The Pro-M 75mm MAF has/had calibration issues with injectors other than stock sizes, especially the 24lbers.

The Cobra 73mm MAF is better than stock, and that's about all people say about it. From the word, it's not as accurate as the aftermarket pieces.

Basically, there isn't a whole lot of hard data floating around about the MAF's that I've seen. Quite frankly, I haven't been looking much since my Mustang was SD until I picked up the 02GT last week.

[gtsr515]

Thanks, that pretty sums it up.

Why do you suppose Pro-M has calibration problems with 24's?

[Mach 1]

I think he meant just the "Bullit" has calibration problems with the 24 lb'ers, and I would like to know where you heard this also, as I am running that combination and am having some "surging idle" issues that Im 98% sure are caused by the MAF meter.

[Unit 5302]

Yes, I meant specifically the Pro-M Bullitt 75mm MAF. It's been a while since I was first informed about the problem. Apparently, it wasn't too long after the MAF came out that problems were beginning to surface in regards to calibrations with the 24lb/hr injectors. Reports that I read indicated that Pro-M was continuing to research and update the calibration settings on the MAF to get rid of the issue, but I haven't ever heard that they were able to do so. The search engine on this site is pretty difficult to work with in a lot of cases, and I couldn't find where it originally came from.

If anybody would know about them correcting the issue, KillerCanary would. He's running the Pro-M 75mm with 24lb/hr injectors on an SN95 vert with an EEC tuner.

[Unit 5302]

Here are a couple threads. One dates back to June of 2001 that I responded on with the issue in question.

http://forums.mustangworks.com/showt...&threadid=2584

http://forums.mustangworks.com/showt...t=ProM+Bullitt

Seems like Pro-M may have fixed the problem, but there is a mix of people who had cold start issues, and some information about poor mapping in the midrange, etc.

I haven't heard about them offering a new calibration, so I don't recommend the Pro-M 75 with 24lb/hr injectors. Better safe than sorry I guess, hehe.

[gtsr515]

Great info Unit, yude-a-man!

On a sour note, did you guy's know that Bob Atwood died, I knew him back in the eighty's starting out, bummer!

[Jeb_Bush_2000]

Seems like Pro-M may have fixed the problem, but there is a mix of people who had cold start issues, and some information about poor mapping in the midrange, etc.

Just for the record, I had cold-start problems when I removed my MAF bracket...with a stock MAF.

[fiveohpatrol]

Whats the word on the Pro-M optimizer? I found mine cheap ($75) from a co-worker and thats the only reason I got rid of SD.

I have recently encountered a cold start problem, just not sure if its the same as you mention above. When it sits overnight, it kinda struggles to idle when i first start it, then its fine after about a minute. Do you think its the setting on the meter itself? Should I try to sell it and get another one? I was looking at the C&L with the intake elbow, it seems like a good deal.

[Jeb_Bush_2000]

Mine would stumble a little, run kind of rich, and sort of chug along at 400-500rpm. It drove fine, though, and after it warmed up it idled fine. I put the bracket back on and haven't had any cold-start problems since.

[sn95gt19]

i had a pro-m mass air, calibrated for 24 pound injectors and it ran like crap, it ran better with my stock mass air (calibrated for 19#) im going to the c&l because they say that it will cost $100 to have the sensor recalibrated from pro-m.

[Mach 1]

I tried the "optimiser" and it was a piece of crap. i would stay away from it if I was you, and suspect this is why your friend sold it so cheap, to get rid of it.

I had bad luck with mine, and had to send it back three times for them to fix it. Finally, I told them to keep it and just had the regualar electronics installed back on my meter.

[sn95gt19]

i was thinking about getting another pro-m mass air, but you guys say that they have since fixed the problem,ARE YOU SURE, cause i dont want to spend the money for another P.O.S. (i mean one calb'd for 24# injectors)

[Unit 5302]

Originally posted by sn95gt19
i was thinking about getting another pro-m mass air, but you guys say that they have since fixed the problem,ARE YOU SURE, cause i dont want to spend the money for another P.O.S. (i mean one calb'd for 24# injectors)

Originally posted by Unit 5302:
Seems like Pro-M may have fixed the problem, but there is a mix of people who had cold start issues, and some information about poor mapping in the midrange, etc.

I haven't heard about them offering a new calibration, so I don't recommend the Pro-M 75 with 24lb/hr injectors. Better safe than sorry I guess, hehe.

I think that last paragraph I posted sums it up. No. I'm not sure the problems were fixed. There are some people who run the combo that I'm not hearing problems from. There are some people who do seem to have issues. If you want to risk it, it's up to you.