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Unread 01-04-2011   #1 (permalink)
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Talking Mass Air Meter For 24lb injector questions.

I have finaly got almost all i need to convert to MAF.

Ive have:

Mass Air Meter For 24lb Injectors.
All Tubing.
Plug From 91LX To wire In.
Computer From 91LX.

I Need:

24lb injectors.:laughlitt


Is that all i need?

And i need to know if i can just run the 24lb injecters with the 91 computer and the 24lb MAF. I dont want to get a corbra computer because u cant find them.

In case u guys need my mods.

GT40 Intake.
75 MM throttle Body.
Off Road H pipe. With Flowmasters.
Smog Delete
EGR Delete
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Unread 01-04-2011   #2 (permalink)
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If you're looking for a Cobra Computer, try MPS Auto Salvage and ask for Bill or Derik. Their number is: ( 800-236-1156 ). You shouldn't need the Cobra Computer, as long as the MAF is calibrated for 24# injectors, Mike.
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Unread 01-04-2011   #3 (permalink)
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dont waste time or $$ on the X3Z(cobra EEC)
you basically have all you need

http://www.corral.net/tech/powerplant/maf_tech_2.html
Mustang Mass Air Conversion
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Unread 01-04-2011   #4 (permalink)
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1. What meter do you have? This will determine what ecu you should be looking to buy...

2. Depending on the answer to question #1, the X3Z may be the most cost effective and reliable ecu option... or maybe it isn't...
My point is, an ecu shouldn't be recommended/purchased until the details on the MAF are known.

I wouldn't call the X3Z a 'waste of money', but that's just me
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Unread 01-04-2011   #5 (permalink)
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I will ASSUME that when you say you have a 24# MAF, you mean you have a MAF that is calibrated for 24# injectors...

As opposed to a Cobra MAF which is not calibrated at all...

If the MAF is calibrated, then you will be fine with the computer you have...

BUT, if it is simply a MAF from a Cobra, then it is really the exact same MAF as from the GT...so, to use the 24# injectors, you would need EITHER the Cobra computer OR a different MAF that is calibrated...

Clear as mud?
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Unread 01-04-2011   #6 (permalink)
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Yeah that is pretty much what you need but for your build your fine with the 19's.
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Unread 01-04-2011   #7 (permalink)
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Ok I have the computer from a MAF car (91 LX.) My car is an 87 GT. Can i just run the computer from the 91 with the MAF that is calibrated for 24lb injectors.

And i know i will be fine with the 19lb injectors but i got the MAF calibrated for 24lb injectors for cheap. So i would rather buy 24lb injectors then get a new MAF. So will i be ok with my mods to run 24lb injectors?
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Unread 01-04-2011   #8 (permalink)
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Quote:
Originally Posted by dudeboy View Post
1. What meter do you have? This will determine what ecu you should be looking to buy...

2. Depending on the answer to question #1, the X3Z may be the most cost effective and reliable ecu option... or maybe it isn't...
My point is, an ecu shouldn't be recommended/purchased until the details on the MAF are known.

I wouldn't call the X3Z a 'waste of money', but that's just me
well..he said 91 computer..so i assumed A9L/P etc..

but yeah..what brand/make/model MAF?
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Unread 01-04-2011   #9 (permalink)
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Quote:
Originally Posted by RYAN87GT View Post
Ok I have the computer from a MAF car (91 LX.) My car is an 87 GT. Can i just run the computer from the 91 with the MAF that is calibrated for 24lb injectors.
Can't answer that until you give brand and part numbers for the meter.
If it is ProM/PMAS then I suggest calling the manufacturer to verify.
If it is Ford, then post the part numbers and the housing ID... better yet, a photo of the housing.
If it is C&L then post the part number on the sensor, ID of the housing, and color code of the sample tube. If there is no color on the sample tube then I suggest measuring the ID of both the entry and exit of the sample tube.

Also, please post the catch code of the ecu, just to make sure we aren't dealing with some wierdo computer...
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Unread 01-04-2011   #10 (permalink)
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If you have a 5.0 HO ECM from a mustang it will work with whatever meter you use as long as its calibrated for the inj. DO not use a cobra ECM they are not as aggressive as the a9l or a9p and whatever sister ECMs there are. For 24 # inj a C&L, ProM or Pmas is fine the C&L is probably the cheapest.
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Unread 01-04-2011   #11 (permalink)
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spdjnky u answered what i needed to know. thats all iwanted to know. what im basicaly asking is can i bolt on the Maf and injectors and be fine like without a tune. :?:
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Unread 01-04-2011   #12 (permalink)
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i can take more pics if u guys want other angles.
Attached Thumbnails
Mass Air Meter For 24lb injector questions.-nooddles-cell-pics-066.jpg  Mass Air Meter For 24lb injector questions.-nooddles-cell-pics-067.jpg  Mass Air Meter For 24lb injector questions.-nooddles-cell-pics-068.jpg  Mass Air Meter For 24lb injector questions.-nooddles-cell-pics-069.jpg  
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Unread 01-05-2011   #13 (permalink)
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Yes you can put in a 24# inj set and calibrated MAF with an a9l or a9p (or sister) ecm. The cobra ecm is already calibrated for 24# inj and has less timing when shifting. That kinda looks like a ProM meter to me thats a good one and will be fine if its calibrated for the inj. Looks like they peeled the calibration sticker off thats why you cant find an info. Also being its a 75mm it will be calibrated for small inj like 19,24,30#. So you should be on the right track. Also ProM will recal those for $100 if you ever upgrade inj due to bigger hp app.

Pro-M 75MM Unflanged Bullet Mass Air Meter for Ford Mustang and Thunderbird - Pro-M Racing, LLC.
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Unread 01-05-2011   #14 (permalink)
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Quote:
Originally Posted by spdjnky_42 View Post
If you have a 5.0 HO ECM from a mustang it will work with whatever meter you use as long as its calibrated for the inj.
The bold/underline is used to emphasize the ASSUMPTIONS being made.
If you are comfortable with these assumptions and the associated risks... then you have everything you need to know.

If it were me?
I would confirm every detail of that meters calibration. Call the manufacturer, and if needed send it in for verification or re-calibration.


Quote:
Originally Posted by spdjnky_42 View Post
DO not use a cobra ECM they are not as aggressive as the a9l or a9p and whatever sister ECMs there are.
I have seen this over and over again on this site.
Can you elaborate on how the X3Z is "not as aggressive"?



Quote:
Originally Posted by RYAN87GT View Post
spdjnky u answered what i needed to know. thats all iwanted to know. what im basicaly asking is can i bolt on the Maf and injectors and be fine like without a tune. :?:
Ryan, nothing against spdjnky because he is trying to help based on the limited info you have provided, but you are still guessing at what you have.
Once again...
Quote:
Originally Posted by dudeboy View Post
Also, please post the catch code of the ecu, just to make sure we aren't dealing with some wierdo computer...




Quote:
Originally Posted by spdjnky_42 View Post
Yes you can put in a 24# inj set and calibrated MAF with an a9l or a9p (or sister) ecm.
I agree, ASSUMING he has an A9* or similar, and the MAF really is what he thinks it is...

Quote:
Originally Posted by spdjnky_42 View Post
The cobra ecm is already calibrated for 24# inj and has less timing when shifting.
Does it matter what the timing is between shifts?
Assuming there is less timing in the X3Z between shifts, I can't see how that would make a noticeable difference to how the car runs...
Are there other differences that would make a SIGNIFICANT performance difference?


Quote:
Originally Posted by spdjnky_42 View Post
That kinda looks like a ProM meter to me thats a good one and will be fine if its calibrated for the inj.
Yes, it does look like ProM...

Quote:
Originally Posted by spdjnky_42 View Post
Also being its a 75mm it will be calibrated for small inj like 19,24,30#. So you should be on the right track.
Again, using the bold underline to highlight the assumption of the previous vehicle/application being n/a.



spdjnky,
I quoted you alot here, and that is usually mistaken as an attack. Don't take it that way... you would know if I wanted to attack...
I'm just trying to emphasize that there a ton of variables to verify... and that if ALL of them are not verified, then the OP is still guessing.
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Unread 01-05-2011   #15 (permalink)
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I understand completely. I cannot fully answer your question on the cobra ECM but I have used them and they dump timing. Yes that will cause a performance issue. Maybe not as noticeable for some but IM in it for every last drop of HP not mpg. Second the 75mm meters are calibrated for 19,24,30# inj. If someone had it recalibrated higher most likely pro m would have done a swap to an 80mm. Also if its calibrated for 30# inj or 19 he will notice very easily by plug color, o2 codes, rough idle, loss of power in the WOT rpm's, etc. He is not supercharged so these are things that can be addressed later with no worry of harm to the engine. Not to mention it came with a set of 24# inj. What you are stating would be on the same guidlines of what if I bought a meter directly from Pro M and they calibrated it wrong. Just something that will have to be worked out. Also Pro M meters are very good meters I run 52# inj and they only calibrated mine for 50#. On a dyno that is fixed by fuel pressure and ECm fuel curve not that this is the case here just sayin. There is more than one way to skin a cat. Also Im sure he is aware of the ECm he has I doubt he bought one with no part # on it.
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