Davidwnuc
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- Mar 13, 2022
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- On order ‘22 RCSB.
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Just wanted to make sure all the Roush Supercharged guys knew that there is a tune revision out. Its a free update from Roush. You either have to have your Roush dealer do it for you or do it yourself.
Long story short…one of my catalytic converts came apart while doing a 0-60 run. 24 hours later the check engine light came on. Took to Ford who replaced the cat under warranty. I then contacted Roush and was informed they have a tune revision that is supposed to prevent cat/engine damage.
You have to email them and open a case.
[email protected]
“…they call it long term robustness…”
“Engine and/or Catalyst Failure associated with high RPM operation in manually selected gear position. Extended operation at the engine speed limiter, as can occur with transmission in manually selected gear, can result in large oscillations in engine torque and exhaust flow potentially causing engine or catalyst damage. A revised calibration provides smoother operation at the speed limiter in these conditions.”
I was not shifting manually at the time, truck was handling that itself.
Hard to explain…my cheapo laptop doesnt have excel so i had to screen shot graphs to compare.
It seemed sketchy to repeat the conditions that led to the failure in order to datalog but I did grab some data pre and post revision while doing a short on ramp pull which wasn’t as violent as from a dead stop but still WOT. It appears that the new tune brings cat over temperature protection in a little sooner but it doesn’t add as much fuel as it did pre revision. Example-A/F would go to ~10.5 after hitting 1600F on old tune. New tune A/F hits ~11.5 but at 1400F. This seems to be key to keeping the cats from melting and something discussed at length on the mustang 6g forum. Of note, my cat was not melted, it was shattered into a bunch of pieces. It rattled like it was full of rocks when I shook it.
I think this is more what Roush means with they talk about “smoother operation”
Throttle position doesnt swing up and down during shift events like before. The old tune would cut throttle way back to ~45% then ramp it back up. The new tune still cuts throttle but slower and only to ~60%.
My 18yr old son rides with me a lot and he could tell the truck was smoother during WOT runs. No more head thrown forward feeling during shifts he said.
Hope this is helpful to someone.
You can find pictures of my destroyed cat on this forum.
Long story short…one of my catalytic converts came apart while doing a 0-60 run. 24 hours later the check engine light came on. Took to Ford who replaced the cat under warranty. I then contacted Roush and was informed they have a tune revision that is supposed to prevent cat/engine damage.
You have to email them and open a case.
[email protected]
“…they call it long term robustness…”
“Engine and/or Catalyst Failure associated with high RPM operation in manually selected gear position. Extended operation at the engine speed limiter, as can occur with transmission in manually selected gear, can result in large oscillations in engine torque and exhaust flow potentially causing engine or catalyst damage. A revised calibration provides smoother operation at the speed limiter in these conditions.”
I was not shifting manually at the time, truck was handling that itself.
Hard to explain…my cheapo laptop doesnt have excel so i had to screen shot graphs to compare.
It seemed sketchy to repeat the conditions that led to the failure in order to datalog but I did grab some data pre and post revision while doing a short on ramp pull which wasn’t as violent as from a dead stop but still WOT. It appears that the new tune brings cat over temperature protection in a little sooner but it doesn’t add as much fuel as it did pre revision. Example-A/F would go to ~10.5 after hitting 1600F on old tune. New tune A/F hits ~11.5 but at 1400F. This seems to be key to keeping the cats from melting and something discussed at length on the mustang 6g forum. Of note, my cat was not melted, it was shattered into a bunch of pieces. It rattled like it was full of rocks when I shook it.
I think this is more what Roush means with they talk about “smoother operation”
Throttle position doesnt swing up and down during shift events like before. The old tune would cut throttle way back to ~45% then ramp it back up. The new tune still cuts throttle but slower and only to ~60%.
My 18yr old son rides with me a lot and he could tell the truck was smoother during WOT runs. No more head thrown forward feeling during shifts he said.
Hope this is helpful to someone.
You can find pictures of my destroyed cat on this forum.
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