Calibrated Mafs...what gives?

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Calibrated Mafs...what gives?

Unread postby Fasterthangas » Wed Jul 11, 2018 3:26 pm

I know these mafs and adjustable fuel pressure regulators are old school but they still work great for guys. Why are these mafs looked down upon?
Fasterthangas
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Re: Calibrated Mafs...what gives?

Unread postby decipha » Wed Jul 11, 2018 4:18 pm

First I've heard of anyone looking down upon them.

Any MAF that can accurately meter the air going in to the engine is perfectly fine. Its original application is irrelevant. If anyone tells you different they're probably just ignorant.

Others may have different opinions but I don't personally see anything wrong with them.
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Re: Calibrated Mafs...what gives?

Unread postby Fasterthangas » Wed Jul 11, 2018 4:28 pm

decipha wrote:First I've heard of anyone looking down upon them.

Any MAF that can accurately meter the air going in to the engine is perfectly fine. Its original application is irrelevant. If anyone tells you different they're probably just ignorant.

Others may have different opinions but I don't personally see anything wrong with them.


Well that's good to know. I've considered doing this on my '95 after cruising with guy's who run them on their modified Foxes. Their cars are street and track and they have no complaints. In doing some research; it has been suggested that these Mafs mess with timing. If it's truly as easy installing calibrated mafs, injectors and adjustable regulators; why am I messing with tuning for three years instead of enjoying my car?
That's where I'm at these days.
Fasterthangas
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Joined: Sun Aug 02, 2015 1:28 pm
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Vehicle Information: '95 Mustang GT
347 SBF
10.0:1 cr
Systemax ll
230/238 @ .050 custom cam
AFR Renegade 185 heads
Ford Racing EV14 34lb. injectors
90mm Lightning MAF
4" CAI
Accufab 75mm TB
T5
3.73's
1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers

Re: Calibrated Mafs...what gives?

Unread postby decipha » Wed Jul 11, 2018 4:44 pm

Being a tuning forum I was referring specifically to tuning them.

20 years ago people relied on calibrated MAF's since there wasn't a whole lot of support available for tuning the ecu's. At that time it was "ok" to have drive ability issues since that's basically all you had to work with people knew it was to be expected.

These days there's no reason to rely on a calibrated maf in lieu of properly calibrating the ecu.

Calibrated mafs cannot adjust cranking pw nor dashpot nor startup enrichment nor startup air compensation nor commanded lambses nor accel enrichment, transient enrichment, adaptive logic, idle control, spark tuning etc...

All a calibrated maf does is scale the airflow as detailed in the maf write up. Thus that's correct spark is increased for a given condition since calculated load will be lower.

If it were truly that easy tuning wouldn't exist.
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
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98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
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00 Explorer 5L - Bernyce

Re: Calibrated Mafs...what gives?

Unread postby Fasterthangas » Wed Jul 11, 2018 4:47 pm

decipha wrote:Being a tuning forum I was referring specifically to tuning them.

20 years ago people relied on calibrated MAF's since there wasn't a whole lot of support available for tuning the ecu's. At that time it was "ok" to have drive ability issues since that's basically all you had to work with people knew it was to be expected.

These days there's no reason to rely on a calibrated maf in lieu of properly calibrating the ecu.

Calibrated mafs cannot adjust cranking pw nor dashpot nor startup enrichment nor startup air compensation nor commanded lambses nor accel enrichment, transient enrichment, adaptive logic, idle control, spark tuning etc...

All a calibrated maf does is scale the airflow as detailed in the maf write up. Thus that's correct spark is increased for a given condition since calculated load will be lower.

If it were truly that easy tuning wouldn't exist.


Thanks. That's what I was looking for.
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Joined: Sun Aug 02, 2015 1:28 pm
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Vehicle Information: '95 Mustang GT
347 SBF
10.0:1 cr
Systemax ll
230/238 @ .050 custom cam
AFR Renegade 185 heads
Ford Racing EV14 34lb. injectors
90mm Lightning MAF
4" CAI
Accufab 75mm TB
T5
3.73's
1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers


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