Tales From the dyno: S-AFC vs. XFlash
Originally Posted by shiv@vishnu
How is using a better combination of air, fuel and timing unfair? It's not my fault the S-AFC has no ability to retard timing 

I think the point of this was to show the tuning limitations of the AFC. The tuner of the AFC obviously knew what he/she was doing. They kept the boost at 20psi max, which is the most anyone should run on pump gas without having control over ignition timing. Running more boost than that on the AFC, as shiv said, can result in run to run inconsistancy and timing being pulled due to knock. So I think you could call the original setup a "safe" AFC tune. The XFlash (which costs little more than an AFC) can safely run more boost since it has remapped ignition timing, and as a result it makes more power. Take this at face value, and at face value that's exactly what it says.
- Steve
- Steve
first of all, the afc boost wasn't even 20 psi . It hit 18 then tapered down to 16ish. I just want the game to be fair tis all. To show the power of full timing control ONLY. Hell, the afc probably could have made the power of the xflash on the same boost level. We'll never know. Anyone can jack up the boost and claim a good gain. That's given. If you really wanna see a good gain, put the boost the same and tune it from there.
Originally Posted by Widebandphillip
first of all, the afc boost wasn't even 20 psi . It hit 18 then tapered down to 16ish. I just want the game to be fair tis all. To show the power of full timing control ONLY. Hell, the afc probably could have made the power of the xflash on the same boost level. We'll never know. Anyone can jack up the boost and claim a good gain. That's given. If you really wanna see a good gain, put the boost the same and tune it from there.
FWIW the SAFC tuner did do a good job making power for the tools he had
Originally Posted by Widebandphillip
first of all, the afc boost wasn't even 20 psi . It hit 18 then tapered down to 16ish. I just want the game to be fair tis all. To show the power of full timing control ONLY. Hell, the afc probably could have made the power of the xflash on the same boost level. We'll never know. Anyone can jack up the boost and claim a good gain. That's given. If you really wanna see a good gain, put the boost the same and tune it from there.
better to keep your mouth shut and let us hypothosize that you might be an idiot, rather than open it and leave no doubt
Here is a fun little exercise.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.
Originally Posted by ez76
Here is a fun little exercise.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.

That rocks the house down.
Originally Posted by ez76
Here is a fun little exercise.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.
Stick out your right leg and make clockwise circles with your foot.
Now, stick out your right hand and try to draw a number "6" at the same time WITHOUT having your foot change direction.
Now, using an SAFC, add fuel at a given load/RPM point and advance timing.
daaamm, that was hard
Originally Posted by Widebandphillip
first of all, the afc boost wasn't even 20 psi . It hit 18 then tapered down to 16ish. I just want the game to be fair tis all. To show the power of full timing control ONLY. Hell, the afc probably could have made the power of the xflash on the same boost level. We'll never know. Anyone can jack up the boost and claim a good gain. That's given. If you really wanna see a good gain, put the boost the same and tune it from there.

Granted it didn't hit 20, maybe 19.5....
lol..maybe you should learn how to read a graph, i remember you saying it hit 20 when it didn't even hit 20. Plenty of people use the afc at 20psi , that's why i thought this was an unfair advantage to the xflash. To the guy that said i'm an idiot, well i'd rather tune my own car on my utec than have some flash. What if you change your mods? OH NOES gotta get another flash and hope for the best lol. I'd rather have my car tuned safely rather than having the flash tuned to the limits of the stock knock sensor. Lets just throw money at all our problems rather than take the time to LEARN how to work with it. Take my advice, learn how to tune your OWN **** and then talk.
Originally Posted by Widebandphillip
lol..maybe you should learn how to read a graph, i remember you saying it hit 20 when it didn't even hit 20. Plenty of people use the afc at 20psi , that's why i thought this was an unfair advantage to the xflash. To the guy that said i'm an idiot, well i'd rather tune my own car on my utec than have some flash. What if you change your mods? OH NOES gotta get another flash and hope for the best lol. I'd rather have my car tuned safely rather than having the flash tuned to the limits of the stock knock sensor. Lets just throw money at all our problems rather than take the time to LEARN how to work with it. Take my advice, learn how to tune your OWN **** and then talk.


