SAFC Increases timing?? Hear me out....
SAFC Increases timing?? Hear me out....
Disclaimer, yeah I know you cannot set an exact timing incriment at a set rpm with a SAFC, I would need a flash or a standalone to do this, so I am not arguing this point, but a slightly different angle on this SAFC Trick.
OK, I wuz thinking....
When you introduce a SAFC to a MAF system to lean out a very FAT topend, you effect the MAF readings. So when your MAF should read say 1800HZ and you lean it out say 10% the car actually sees 1620HZ, and pulls fuel back as well. Doing thsi actually advances timing as the car thinks it is fatter and can afford to do so until it hits a leaner condition and then pulls back timing. So your car actually reads less air then there really is, pulls back fuel, and therefore advances timing but a couple of degrees. This is how you gain power, mixture is hotter, and you have advanced timing. Needless to say topend is improved on a proper tune.
NOW
Lets say you add injectors that are bigger, like 660's on the Evo, you now have to lean things out quite a bit, especially in the lower RPMS, so that will really raise the Timing as you lean it out so much that the car sees way less air then there is.
Isn't this a way to increase lowend torque by alot and also increase spoolup?
POwer would also increase as the car thinks it is putting way less fuel and air into the motor as the injector duty cycle is say 65% but since the injectors are bigger, it is a lot more fuel then read. And there is also a LOT more boost the car does not read, so it advances timing, ON TOP of more fuel and boost, to give a massive gain in power.
AMS had stated this and I remember some DSM guys doing the same, so the AFC really does advance timing but not to a specified point, right? Can anyone testify to this?
OK, I wuz thinking....
When you introduce a SAFC to a MAF system to lean out a very FAT topend, you effect the MAF readings. So when your MAF should read say 1800HZ and you lean it out say 10% the car actually sees 1620HZ, and pulls fuel back as well. Doing thsi actually advances timing as the car thinks it is fatter and can afford to do so until it hits a leaner condition and then pulls back timing. So your car actually reads less air then there really is, pulls back fuel, and therefore advances timing but a couple of degrees. This is how you gain power, mixture is hotter, and you have advanced timing. Needless to say topend is improved on a proper tune.
NOW
Lets say you add injectors that are bigger, like 660's on the Evo, you now have to lean things out quite a bit, especially in the lower RPMS, so that will really raise the Timing as you lean it out so much that the car sees way less air then there is.
Isn't this a way to increase lowend torque by alot and also increase spoolup?
POwer would also increase as the car thinks it is putting way less fuel and air into the motor as the injector duty cycle is say 65% but since the injectors are bigger, it is a lot more fuel then read. And there is also a LOT more boost the car does not read, so it advances timing, ON TOP of more fuel and boost, to give a massive gain in power.
AMS had stated this and I remember some DSM guys doing the same, so the AFC really does advance timing but not to a specified point, right? Can anyone testify to this?
Re: SAFC Increases timing?? Hear me out....
Originally posted by umiami80
Disclaimer, yeah I know you cannot set an exact timing incriment at a set rpm with a SAFC, I would need a flash or a standalone to do this, so I am not arguing this point, but a slightly different angle on this SAFC Trick.
OK, I wuz thinking....
When you introduce a SAFC to a MAF system to lean out a very FAT topend, you effect the MAF readings. So when your MAF should read say 1800HZ and you lean it out say 10% the car actually sees 1620HZ, and pulls fuel back as well. Doing thsi actually advances timing as the car thinks it is fatter and can afford to do so until it hits a leaner condition and then pulls back timing. So your car actually reads less air then there really is, pulls back fuel, and therefore advances timing but a couple of degrees. This is how you gain power, mixture is hotter, and you have advanced timing. Needless to say topend is improved on a proper tune.
NOW
Lets say you add injectors that are bigger, like 660's on the Evo, you now have to lean things out quite a bit, especially in the lower RPMS, so that will really raise the Timing as you lean it out so much that the car sees way less air then there is.
Isn't this a way to increase lowend torque by alot and also increase spoolup?
POwer would also increase as the car thinks it is putting way less fuel and air into the motor as the injector duty cycle is say 65% but since the injectors are bigger, it is a lot more fuel then read. And there is also a LOT more boost the car does not read, so it advances timing, ON TOP of more fuel and boost, to give a massive gain in power.
AMS had stated this and I remember some DSM guys doing the same, so the AFC really does advance timing but not to a specified point, right? Can anyone testify to this?
Disclaimer, yeah I know you cannot set an exact timing incriment at a set rpm with a SAFC, I would need a flash or a standalone to do this, so I am not arguing this point, but a slightly different angle on this SAFC Trick.
OK, I wuz thinking....
When you introduce a SAFC to a MAF system to lean out a very FAT topend, you effect the MAF readings. So when your MAF should read say 1800HZ and you lean it out say 10% the car actually sees 1620HZ, and pulls fuel back as well. Doing thsi actually advances timing as the car thinks it is fatter and can afford to do so until it hits a leaner condition and then pulls back timing. So your car actually reads less air then there really is, pulls back fuel, and therefore advances timing but a couple of degrees. This is how you gain power, mixture is hotter, and you have advanced timing. Needless to say topend is improved on a proper tune.
NOW
Lets say you add injectors that are bigger, like 660's on the Evo, you now have to lean things out quite a bit, especially in the lower RPMS, so that will really raise the Timing as you lean it out so much that the car sees way less air then there is.
Isn't this a way to increase lowend torque by alot and also increase spoolup?
POwer would also increase as the car thinks it is putting way less fuel and air into the motor as the injector duty cycle is say 65% but since the injectors are bigger, it is a lot more fuel then read. And there is also a LOT more boost the car does not read, so it advances timing, ON TOP of more fuel and boost, to give a massive gain in power.
AMS had stated this and I remember some DSM guys doing the same, so the AFC really does advance timing but not to a specified point, right? Can anyone testify to this?
here is the same evo with a professional SAFC tune and the the dyno flash
writing in the exact timing yeilds major power
