interesting observation with removal of stock cat
#1
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Location: S.F. Bay Area, CA
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interesting observation with removal of stock cat
I just removed my stock cat ( huge pita ) and replaced it with a resonating MP. One thing I noticed was that with my high mileage engine (128K), I would always get a fair amount of white smoke coming out from the exhaust for a few minutes during a cold start. When I cranked the engine with the MP to my surprise there was no white smoke! What's up with that? Does the stock cat hold that much condensation? All this time I thought that I was burning either oil or coolant. ( although I never smelled coolant, only rich exhaust)
I thought I read a previous post and someone commented the same observation. Has anyone else experienced this and know exactly why this happens?
I thought I read a previous post and someone commented the same observation. Has anyone else experienced this and know exactly why this happens?
Last edited by overkill; 08-08-05 at 02:00 AM.
#3
all the cells inside the cat create a huge surface area for condensation to collect on, so although i am not sure - it is perfectly possible that the smoke you saw was condensation from the cat.
#4
RX-7 Bad Ass
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What's funny is I've had opposite experiences on FC's. On non-turbo FC's it's not too uncommon to have bad oil seals in the motor. In that case you get less smoking with a cat, as it seems to collect the oil and burn it off slowly, or burns it hotter, or something . With a straight pipe it's a smoke show.
But, I'd vote for the condensation on your car.
Dale
But, I'd vote for the condensation on your car.
Dale