Factory Set Restriction On TB Plate Under 3k RPM??!!

[5literPwr]

I have just read a post elsewhere claiming that Ford 4.6 Mustangs come set from the factory with a throttle body plate restriction based upon engine rpms.

Specifically, the claim was that when the engine is operating at less than 3000 rpms, the throttle body plate is restricted from opening beyond 40% regardless of how deep your foot is on the gas pedal.


At the same time I also read that a certain tune would eliminate this restriction and allow the TB plate to open under 3k rpm without this restriction.

So, does anyone know if this claim true? And if so, does anyone have any more detail into the "tune" specifics needed in ridding this TB plate restriction?? Thanks in advance.

 

[KBExperience]

What are you talking about?

The TB plate is cable controlled on 96-04 mustangs. You push the gas pedal, and however much you push the pedal, that's how far the TB opens.

 

[007]

What a load of BS. Its a simple manual throttle body!

 

[trinity_gt]

The DBW (drive by wire) setups used on more recent Mustangs have such control strategies (though I'm not positive about this particular one) whose calibrations and parameters can be adjusted via the tune. However, as noted, our sticks-and-stones pre-05 cars use a primitive (and yet, somehow, still remarkably effective...) cable between the pedal and the plate and there's no computer intervention possible.

 

[nyuk98gt]

5literPwr:

+1 for what "trinity_gt" said. The drive-by-wire throttlebody can be re-mapped in the tune. Pre-05's are mechanically operated and have no restrictions built-in.

For +'05 model TB tuning, SCT requires that the tuner take one of their courses. They do NOT allow Pro Racers to adjust the TB mapping unless you graduate from their course. I presume they do this because of liability and they want you to know what you are doing. Call SCT (sctflash.com) if you want more information.

Chris

 

[Steve491]

5literPwr:

+1 for what "trinity_gt" said. The drive-by-wire throttlebody can be re-mapped in the tune. Pre-05's are mechanically operated and have no restrictions built-in.

For +'05 model TB tuning, SCT requires that the tuner take one of their courses. They do NOT allow Pro Racers to adjust the TB mapping unless you graduate from their course. I presume they do this because of liability and they want you to know what you are doing. Call SCT (sctflash.com) if you want more information.

Chris

+2 on drive-by-wire on 2005 and newer

What could SCT possibly be liable for by selling you a tuner? As far as I'm concerned the tuner (hardware, not tunes) business is a racket.

 

[nyuk98gt]

Steve491:

Consider the whole "Toyota stuck throttle" saga. The investigation has shown that there's nothing in the Toyota tune to cause a stuck throttle but lawyers are lined up to sue Toyota.

You can imagine the same thing happening to a Pro Racer who modified the DBW TB table(s) but without having "sufficient training". SCT would be sued, too, for providing the Pro Racer access to those table(s). If the Pro Racer takes and passes a course then they have enough knowledge to know what they are doing.

Paraonoid? I don't think it is far-fetched. Look at the courts and long list of goofy cases waiting to be heard. [/rant]

Chris