mass airflow sensor

[mynewcar]

i was wondering which mass airflow sensors are interchangable. im trying to switch to 24 lbs injectors. i heard that a 99-02 cobra maf will work cause its calibarted for 24 pounds, any info will help thanks

 

[imblown-ru]

any MAF you buy will be calibrated to the car it came off of. You will need it calibrated with a tune to whatever injectors your running in your car.

 

[hognutz]

don't change your maf unless it is pegging. change you tune to accomidate the larger inectors.

 

[jstreet0204]

i was wondering which mass airflow sensors are interchangable. im trying to switch to 24 lbs injectors. i heard that a 99-02 cobra maf will work cause its calibarted for 24 pounds, any info will help thanks

OEM MAF's are not calibrated to injectors. They are calibrated to a flow vs. voltage table. In order to change a MAF the flow table needs to be programmed into the EEC REGARDLESS of what size injectors are used. Changes in injectors also require changes to be made in the EEC.

 

[myponyrocks]

what year stang do you have? if its an 03 or 04 you allready have 21# injectors... 23# isn't going to be a big difference. If you know you will be upgrading in the future why not go a little bigger and tune down since you should re-tune for the swap any how?

 

[hotmustang331]

Why do you want 24# injectors? If your NA, your stock ones should be fine. I am still running stock injectors. (19 or 21...noone knows for sure)

 

[mynewcar]

i need to bigger injectors to feed my .550 lift cams and stage 2 patriot heads i just put on. my car is a 2000, it came with 19lbs from the factory. i did retune my car with my diablo but it wont let me change the fuel maps under 2000 rpms. which is where i have a small miss because i am running lean.

 

[hognutz]

Well you may need the 24lb injectors with those mods but you will need a custom tune.

you should be at around 300hp and if you do the math that is like 23lb injectors

are you not running a custom tune right now? I mean if I had heads and cams I would go get dyno tuned.

 

[jstreet0204]

You still don't need to up the injectors if you only have a lean spot under 2000. If the injectors are keeping up in the uper rpms then your injectors are fine. Log the duty cycle to see where they are. How do you know you are running lean? was this checked with a wideband, or are you assuming. My guess is if you are running lean under 2k, then you need to make some adjustments to the tip-in fuel settings and the injector timings due to the bigger cams. You can't do these with the predator, so you'll need to get a custom tune loaded into it.

 

[myponyrocks]

Why do you want 24# injectors? If your NA, your stock ones should be fine. I am still running stock injectors. (19 or 21...noone knows for sure)

Pink ARE 21# for sure

 

[billfisher]

tip in lean out sucks. transition lean out what ever it's called. i am experiencing it severely. i changed the entire setup to compensate, but it really does require a custom tune. or SCT pro racer. or a custom PCM like FAST/EPIC. the only thing i was able to do to correct it was to run 60 PSI. that led to other part throttle issues.

 

[jstreet0204]

tip in lean out sucks. transition lean out what ever it's called. i am experiencing it severely. i changed the entire setup to compensate, but it really does require a custom tune. or SCT pro racer. or a custom PCM like FAST/EPIC. the only thing i was able to do to correct it was to run 60 PSI. that led to other part throttle issues.

Changing the manifold volume parameter in the EEC will act like an accelerator pump, and adjust the amount of fuel thrown in when you step on the gas. This can be done by any custom tuner, no need to go to something like FAST.

 

[mynewcar]

i was able to tell it was lean by looking at the spark plugs, i didn't need anything fancy to tell me that my car is thirsty lol. yes i am running a custom tune. does anyone know where i can get a custom dyno tune in north east texas for a reasonable price?

 

[jstreet0204]

i was able to tell it was lean by looking at the spark plugs, i didn't need anything fancy to tell me that my car is thirsty lol. yes i am running a custom tune. does anyone know where i can get a custom dyno tune in north east texas for a reasonable price?

Keep in mind that reading plugs in a newer fuel injected car is not the same as the old days. Normal plug wear will nearly always show signs that look somewhat lean because of closed loop operation. The only accurate way to read the plugs would be to put in a brand new set, then immediately make a few WOT runs then check the plugs. You need to get it on a dyno either way, and a reburn of your current chip shouldn't be that much more if you can find a shop that uses the same software.

 

[mynewcar]

i used a diablo predator for my tune. shouldn't anyone be able to tune with that?

 

[myponyrocks]

only Diablo tuners, some places use SCT, call your local Dyno shops to find out.