Cat converter option

[K4fxd]

The aft sensor is measuring oxygen in the cat after the reaction.

Stoich is stoich. It should work without the cat. It's doing 2 jobs, cat health should have no bearing on stoich cal.

I would think the calibration test would be different than the cat test.

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[Robottrainer]

Stoich is stoich. It should work without the cat. It's doing 2 jobs, cat health should have no bearing on stoich cal.

I would think the calibration test would be different than the cat test.

Or the problem is the system goes into fault without the cat. When in fault, the fore aft sensor calibration logic is suspended. You would need to write new logic into the system.

 

[K4fxd]

Or the problem is the system goes into fault without the cat. When in fault, the fore aft sensor calibration logic is suspended.

This is probably the case. Maybe @Rolls can find some time to look into this. It would help true race cars if this system works without cats.

 

[WildHorse]

Or the problem is the system goes into fault without the cat. When in fault, the fore aft sensor calibration logic is suspended.

You'll get the P0420/0430 for sure. But nothing else will change is terms of performance / reliability .

Edit: Damn, didn't take the 18+ into account. May be different for 18+, everything I posted was in reference to 15-17.

 

[GregO]

This is probably the case. Maybe @Rolls can find some time to look into this. It would help true race cars if this system works without cats.

Holy Smokes, is MoTec even a thing at this point ?

 

[Robottrainer]

You'll get the P0420/0430 for sure. But nothing else will change is terms of performance / reliability .

Edit: Damn, didn't take the 18+ into account. May be different for 18+, everything I posted was in reference to 15-17.

Yes we don't know where this started. I have to put something on this thing. The cops around my area have nothing to do and the city and province need money. Either I take my chances with what I have, go Gt500.for the exorbitant cost (I know the 13 GT500s were prone to failure) or aftermarket GENSI units (hard to say if they are any better). It's picking the best from worst and then making it fit.

 

[WildHorse]

es we don't know where this started. I have to put something on this thing. The cops around my area have nothing to do and the city and province need money.

Here in Manitoba it's just a visual. TBH there more interested in straight through muffler violations.

 

[Robottrainer]

Here in Manitoba it's just a visual. TBH there more interested in straight through muffler violations.

Noise gets em sniffing around like you were a fire hydrant

 

[Rolls]

This is probably the case. Maybe @Rolls can find some time to look into this. It would help true race cars if this system works without cats.

Unfortunately it is very difficult for us to ascertain what is a true race car with no VIN and hence enabling these features in the US is not something we have a solution for at the moment. Once we grow as a company we may look into a training course or some other method to enable it. You can make 1000hp with a cat in a street car however I do understand in a real race car you would not run one.

For now we are all about protecting the company and that means disabling CEL codes or any emissions related controls has to be blocked.

 

[Robottrainer]

Unfortunately it is very difficult for us to ascertain what is a true race car with no VIN and hence enabling these features in the US is not something we have a solution for at the moment. Once we grow as a company we may look into a training course or some other method to enable it. You can make 1000hp with a cat in a street car however I do understand in a real race car you would not run one.

For now we are all about protecting the company and that means disabling CEL codes or any emissions related controls has to be blocked.

And this is why a chatted solution that st least stands a fighting Chance with boosted application needs to be smoked out (no pun intended). Yes, the GT500 or Hellcat would most likely do the job, but at 1500 to 2k a pop it's a pricey. Is there any experience with GENSi UHOs or similar? They aren't cheap either but a bit more in the reasonable price department.

 

[WildHorse]

@Rolls is this basically correct ?

re: downstream o2. @engineermike is correct. They do keep the upstream o2 calibrated, in a sense . Narrow band O2's do not need to be calibrated as they are continually oscillating from full rich to full lean and the average is very accurate, but only when near Stoich, so Ford uses the Rears to re-calibrate Stoich of the Front O2's. So to keep the upstream calibrated, periodically replace the upstreams. when the downstream are eliminated.

Rear o2 are meaningless at WOT, or at any range other than at stoich.

 

[junits15]

@Rolls is this basically correct ?

I think the thing that mike was driving at is that FAOSC generates an offset that is applied all the time.

So even though the downstream sensors are not providing useable data at WOT, the learned offset found at part throttle is still active at WOT.

For what its worth I have FAOSC turned off, and then i have an emissions test tune with it back on that i used to pass testing.

 

[GregO]

For what its worth I have FAOSC turned off, and then i have an emissions test tune with it back on that i used to pass testing.

That’s what I call the “Al Capone Tune”

 

[Grimreaper]

https://forum.hptuners.com/showthread.php?91083-FAOSC-with-no-cats

 

[cbrtrx]

https://forum.hptuners.com/showthread.php?91083-FAOSC-with-no-cats

Only issue with that reposted info is that it's from over 15 years ago, before the coyote platform. I've also read that the fuel correction that ford uses was only up to .5 percent but again that was very old info.

I believe that once you change the exhaust components/flow and sensor placement the factory logic would not work well enough to keep it enabled to have any benefit. I've also noticed that all the coyote based Ford racing tunes I've seen have FAOSC disabled. They are for "off road" track use only and have no provisions for rear o2s in the tune either.

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