Im putting on a pi intake and 24 lb injectors. I haves sniper tuner or whatever it is, and im completely rebuilding my engine. Should i retune it or would it be fine how it is?
What package/version of "Sniper" do you have (there has been no Sniper tuning for 4+ years¹). Is it Special Forces or Commando?Wow thanks for then info cliffyk! I appreciate it! Ill tune it with my sniper tuner i have once i get it all done with! Hopefully it makes a noticeable difference! I havent driven my stang in about a year so itll definitely be an amazing first ride!
That is correct; assuming that:So cliffky what your saying is that if I upgrade my injectors I don't need to do anything to the maf?
Oooo now I know what you mean Iam srry my car is obd1 so it is not as easy to tune it as it is for you guys cause there is no handheld tuners for my car I was looking at the sct 4 bama chip on am has any of you guys heard about that?That is correct; assuming that:
[*]Your MAF has sufficient capacity to measure your engine's air flow without "pegging" (reaching 4.9V output). The stock 80 mm MAF can meter up to 2450 lb/h--at 12.5:1 AFR running n/a. In theory that is enough for 400 flywheel HP, approximately 340 at the wheels. In practice people have gone to 375 rwHP or a bit better with the stock MAF;
[*]You alter your tune to set the proper slope, breakpoint and minimum pulse for the new injectors;
"Calibrated" MAFs, those "matched to the injectors" are only needed if you cannot, or choose not to, do things properly and change the tune.
I am running 24 lb/h injectors, with the stock MAF, the only changes were to those scalar values I referenced above and as shown below:
The highlighted values are those for the 24 lb/h injectors, the others are the stock settings.
Ford's recommended value for the 24 lb units high slope was 24.3 lb/h; however I found this was too low, making the engine run rich, The value displayed in the table (25.6 lb/h) is what i arrived at after a few WOT runs...
The 4-tune chip requires an EEC-IV or EEC-V PCM, with the J3 port--what PCM/ECU are you running that is OBD1?Oooo now I know what you mean Iam srry my car is obd1 so it is not as easy to tune it as it is for you guys cause there is no handheld tuners for my car I was looking at the sct 4 bama chip on am has any of you guys heard about that?