D Sport and catless code?

[micro12]

many ppl have told me if your running a dsp on stock computer it wont throw a cat code when you go open downpipe? just wondering if its true or if you still have to do the non fouler mod

[The_Red_Barron]

The DSP can be used to prevent the CEL from going off from having a straight pipe, but it doesn't disable the code all together like the staged PCMs. It sets them to "not ready" and therefore, at least in my case and others that I've seen, won't pass inspection unless you set it back to stock. If your mods are mostly bolt on and you can run with a stock tune, make sure your straight pipe has a bung that will prevent the computer from setting off the CEL, set the car back to stock, and then drive it for like 15 miles and you should be good to go. I learned this the hard way driving over 100 miles trying to get the damn thing to be "ready" lol

[ptperformance]

But you still want to get the COT shut off, let me know if you wan to get this done, see e-mail below.

Thanks.

[thoedsrt4]

what happends if u take the cot off?

[Gizmodo]

You could potentially destroy your cat. However, the more likely scenario is you won't have your AFRs tank in 4th gear when doing a pull through the gears. The problem is our cars don't actually monitor EGTs, it is all based off of tables in the PCM, so various mods can significantly affect actual vs. calculated EGTs. The only true way to know would be to install an EGT probe and monitor. I have one installed, just too lazy to actually do some monitoring and I don't have access to the CMR software to see how close actual vs calculated is. I'm sure someone on here has done that though.