Quote:
Originally Posted by roflwaffle
Well, CARB exempt for a much larger engine anyway. The only way to find out would be through testing but I'm pretty sure a cat designed for a larger engine will take longer to light off than one designed for a specific engine size. It could be designed for a range of displacements, and in that case it should work o.k. but if it's specifically designed for use w/ a larger engine I have my doubts.
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I'm not gonna stick a smaller size cat on my car than the piping its going in. Really, I'm only putting one on there to be legal, if the 12pack and smile version of yearly inspection goes well then I wont be sticking it on at all, you can poo-poo my thoughts on cat's creation polluting more than they clean, but I dont really care, the awsome part is most of these pollutants dont really go all that far, and arent a problem till there is a crazy amount of them in a hot area without rain, I live in a cold rainy area with low traffic, not concerned.
the only problem with the higher flow cat I will be using is that it will only last a few years, instead of the 80,000mi the stock one will, THATS why they are so large, to be a cheep and long lasting as possible. I can assure you it will heat up JUST fine sitting straight after a raceheader that in only a month is now fully blued.... it gets and stays hot, much hotter than the previous. plus there have been others with full racing exhausts and running these cats and gotten tested, and passed, thats why I am going with that exact model, someone with a 2.3l fully built K20 motor pushing 240hp and all KINDS of torque recomended it after finding it and a special muffler actually increased his midrange and low end power without cutting his high end power, and that it tested clean on his (though he has a slightly bigger diameter, mine would only be cleaner).
so basically, I am likely going to be putting something proven clean on my car, even though I dont really care about being clean (the whole summer my non-cat as stock motorcycle is my main ride), and I have DONE my research on it, lay off!