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Discussing 19lb inj /24lb maf /A3M ecu WTF? in the 5.0 Mustangs Forum. i was checking some things on a mustang gt i just purchased and i found ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Newbie
Join Date: Oct 2009
Posts: 13
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19lb inj /24lb maf /A3M ecu WTF?
i was checking some things on a mustang gt i just purchased and i found that it has
oh yeah its a 93 gt 5spd orange 19lb injectors 1993 cobra 24lb maf (F1SF-12B579-AA) A3M ecu which is calibrated for 19lb injectors what is this gonna cause being mismatched? mods i found are initial timing at 16 degrees still has 60mm tb and egr plate explorer upper and lower intake manifold air silencer removed (paper air filter) act sensor relocated to intake tube underdrive pullies shorty headers h-pipe (no cats) flowmasters with turndowns i want more power out of the car im just not sure what to do next do i need to do something about the mismatched injectors,maf,ecu combo what is the next step for more power BBK cai ? Last edited by wick22 : November 3rd, 2009 at 01:03 AM. |
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#2 |
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Newbie
Join Date: Oct 2009
Posts: 13
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well i searched on google and found that a 94-95 gt airflow meter works best as a stock o.e. ford part upgrade i found one at the local pull-a-part and plan to grind the flange off of it
and the cobra meter that is on it now will make it run lean or so ive read |
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#3 |
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Vanilla Godzilla
1988 Japanese girl
The sound of fap
Join Date: Jan 2008
Location: Az
Posts: 4,958
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just grab a stock maf
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#4 |
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Enthusiast
89 gt Hatch
How fast can zippie go down?
Join Date: Jun 2009
Location: CLEVELAND OHIO
Posts: 783
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#5 |
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Vanilla Godzilla
1988 Japanese girl
The sound of fap
Join Date: Jan 2008
Location: Az
Posts: 4,958
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if i remember right the cobra maf is fine with 19s, its the cobra computer calibrated for 24s. Might be your timing is too advanced
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#6 |
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Enthusiast
89 gt Hatch
How fast can zippie go down?
Join Date: Jun 2009
Location: CLEVELAND OHIO
Posts: 783
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The Cheaper way out is to grab a stock maf tho correct?
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![]() Lakewood Uca's/lca's. FMS clutch w/Adj. , Hurst shorty, aluminum d.s. 3.73's Black Stang Crew Co-Founder The blood i bleed is black indeed |
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#7 |
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Vanilla Godzilla
1988 Japanese girl
The sound of fap
Join Date: Jan 2008
Location: Az
Posts: 4,958
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he already has a cobra maf
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#8 |
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Hardcore Enthusiast
1998 Cobra
13.24@105.66
Join Date: Aug 2008
Location: North Carolina
Posts: 1,749
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How many times does it have to be said on the forums that the MAF from the factory (ie. factory cobra 93 maf) is not calibrated to 24lbs. The maf signal is the same. The difference is the 93 cobra computer - calibrated to 24lb injectors.
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weeee foooord!
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#9 |
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Hardcore Enthusiast
1998 Cobra
13.24@105.66
Join Date: Aug 2008
Location: North Carolina
Posts: 1,749
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nope. Usually makes it run richer in most cases.
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weeee foooord!
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#10 |
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MM Fanatic
1990 LX hatch
Join Date: Aug 2006
Location: Hobart Indiana
Posts: 3,101
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The only way to tell if a cobra maf will work with an a9l, and 19# injectors is to flow test the meter with corresponding voltage numbers then convert the flow number to kg/hr, and see if the meters numbers match up with the transfer function table in the a9l.
Or put it on, and check the a/f through various driving conditions.
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#11 |
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Newbie
Join Date: Oct 2009
Posts: 13
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thanks SUPERBEAN so i should be ok with the setup i have then right
ill prob turn timing down to 14 tonight my thinking is that i have the larger maf,cai,explorer intake and free flowing exhaust i prob will look at a accufab 65mm tb and egr plate (i noticed opening on intake manifold is larger than tb to do this) or just get an explorer tb and modify the throttle linkage the tb looks to be the next restriction in the system (except for heads and internals) |
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#12 | |
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Newbie
Join Date: Oct 2009
Posts: 13
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i did alot of searching and reading and found that most people are using the 94/95 gt 5.0 maf because its a 70mm and uses the a9l ecu and 19lb injectors so its a better match for the foxbody |
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#13 |
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Newbie
Join Date: Oct 2009
Posts: 13
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after i get 65mm tb and 94/95 gt maf and bbk cai installed i plan on having it dynoed and tuned to make sure the a/f is proper for engine to be safe
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#14 |
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MM Fanatic
1990 LX hatch
Join Date: Aug 2006
Location: Hobart Indiana
Posts: 3,101
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That could still be an unknown tho. if you can compare the transfer function values between the two and they match it should work..
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#15 |
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Enthusiast
Join Date: Jun 2007
Location: Bedford VA
Posts: 837
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all 3 transfer functions are different , will it run? , yes , will it run the best? , not without chipping it and putting the correct transfer function into the chip tune
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#16 | |
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MM Fanatic
1990 LX hatch
Join Date: Aug 2006
Location: Hobart Indiana
Posts: 3,101
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Good man! I was searching for the tables but came up empty handed.
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#17 | |
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Hardcore Enthusiast
1998 Cobra
13.24@105.66
Join Date: Aug 2008
Location: North Carolina
Posts: 1,749
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spot on. IF your setup doesn't MAX out the STOCK maf, then it's best just to run the oem maf as it's the correct one for that setup. However, if your building a wicked 302 or stroker, aftermarket will be needed. The sn95 5.0 meter (70mm) is a nice upgrade if u find one at the yard (20-30 bucks). Mine ran decent with one (306, gt40p, performer, exhaust, tfs1)
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