problem with my A/F RATIO
5th Gear Member
Joined: Sep 2006
Posts: 4,039
From: CA
RE: problem with my A/F RATIO
ORIGINAL: oxfordgt
I would just order the sniper software and tune the car yourself its very easy anyone can do it. I bought mine for just under $300 off of ebay. Here is a review of the software and what you can do with it. http://www.modularfords.com/articles/Sniper_Tuning_Review/1.htmlReplace the **** with fordsmodular but in reverse. Since you already have a wideband you will be able to tune your car perfect just by doing pulls on the highway and datalogging. All you really need changed is to tell your computer what injectors you have. Never listen to anyone that says "you have to calibrate the MAF" because they don't know what they are talking about. Now before anybody starts trying to sharp shoot me and act like they know more then me, A calibrated MAF is only true with aftermarket MAF sensors like the Pro-M, C&L / Vortec and Auto Specialties air meters, not the stock Ford air meters. What Ford does, is select a MAF sensor and inform the EEC about it by calibrating the airflow Vs voltage transfer function with data obtained from a flow bench. Then they determine how much fuel the engine will require under worst case scenarios, select an injector size, and put that value into the EEC calibration. The MAF sensor and injector size are basically un-related which means a stock4.6 Mustang's MAF sensor IS NOT calibrated for 19# injectors - the EEC is. Now that the EEC knows what air meter it has and what injectors are being used, it can correctly calculate how much to pulse the injectors to get the desired fuel flow.
In order to make more then 8 psi you have to change pulleys. If you have a stock shortblock I would leave it at 8 psi untill you forge the bottom end.
I would just order the sniper software and tune the car yourself its very easy anyone can do it. I bought mine for just under $300 off of ebay. Here is a review of the software and what you can do with it. http://www.modularfords.com/articles/Sniper_Tuning_Review/1.htmlReplace the **** with fordsmodular but in reverse. Since you already have a wideband you will be able to tune your car perfect just by doing pulls on the highway and datalogging. All you really need changed is to tell your computer what injectors you have. Never listen to anyone that says "you have to calibrate the MAF" because they don't know what they are talking about. Now before anybody starts trying to sharp shoot me and act like they know more then me, A calibrated MAF is only true with aftermarket MAF sensors like the Pro-M, C&L / Vortec and Auto Specialties air meters, not the stock Ford air meters. What Ford does, is select a MAF sensor and inform the EEC about it by calibrating the airflow Vs voltage transfer function with data obtained from a flow bench. Then they determine how much fuel the engine will require under worst case scenarios, select an injector size, and put that value into the EEC calibration. The MAF sensor and injector size are basically un-related which means a stock4.6 Mustang's MAF sensor IS NOT calibrated for 19# injectors - the EEC is. Now that the EEC knows what air meter it has and what injectors are being used, it can correctly calculate how much to pulse the injectors to get the desired fuel flow.
In order to make more then 8 psi you have to change pulleys. If you have a stock shortblock I would leave it at 8 psi untill you forge the bottom end.
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