Maybe I am being to simplistic with this but factory cats are designed to be efficient within a certain parameter.
Wow I didn't realize that. Wonder what the hell is causing two of your posted runs to have good solid rich AFR under WOT and one to have lean AFR under WOT since they're all so close together. That's crazy! Cat temp wise though I still think your peak (1900+) temp is from being lean in that one run, since all the runs I saw where you had solid fueling were 300F colder.
Sorry, was at work on that last reply. Now looking at it, yes, lambda around 1 at WOT, the logs happened in order, so yeah it seems my only high temp was that first run. The only log you haven't looked at is 14. see below if you would like. Also has lambda at 1ish at not a very good WOT. The last log, is me at my high idle before I added the thread sealer. I shouldn't complain, I have a new tune I'm supposed to try, but that will have to wait until this weekend. I have to go read about lambda and WOT. Now my other car is acting up, compounding my situation, go figure. Good thing life always works out, lol.
ya, thanks for that. That's the way I entered it, half thinking there would be a month of tweaks. Just being dumb I had it in the head that, naw most likely everything will go just fine. My Jeep has been finished for years, I remember plenty of frustration, just nothing with the engine, or anything that would have been more than a $100 obstacle and maybe some welding, hurting an engine or just the cats is what into the 4 digits, pay to play, yep I know. I sure do hope your right and I'll end up very happy. Just scared of the prospects of emissions testings and my cats not melting before I'm forced into a tough decision.
Well I was letting my brain naysay me into believing that since lots of OEM cars have FI with their cats lasting through the 80k mile warranty thing, things would be just dandy. I get what you are saying, just was hoping someone tuning for use with cats would have that figured out. I now put two and two together that even though companies like ProCharger and Whipple leave the OEM code that offers cat protection in their code, that OEM code was based on 435 HP. Might not be quite enough with what we have going on. Praying it is, and that it will all work out. Don't worry, not a Jesus freak, lol.
Lambda values are another way to represent fueling. They are the equivalence ratio, where stoich is 1.0 for the given fuel. To mathematically figure out AFR from lambda values, multiply the lambda value by the stoich AFR of the fuel. For our application you're shooting for somewhere under 0.8, really around 0.78ish, which is about 11.5AFR rounded up (0.78 * 14.7).
Heh my buddy has been working on his jeep build for about 24 months now, it's like $30K+ into it, LS2 engine, etc... He's plenty frustrated with the timeframe. JustEmptyEveryPocket!
Most of those cars aren't pushing the kind of power ;-). But don't despair yet, because:
If you're gonna break the law run on the street without cats, unless your inspection place looks under your car, why not just tune them out? Then no swapping until you're ready to sell it, and even then only if it's some rando that buys it who may not understand what's up.
Some of the PD superchargers are making much more power than Procharger on the (Procharger) tune. And they are CARB compliant. I am assuming they would not be CARB compliant if they would easily overheat the stock cats.