Quote:
Originally Posted by MikeM7
My OFH/Perrin catback are making my house shake for the first 50 seconds the car is running.. I'd like to do this fix but I read there's a functional reason that it starts up the way it does, and it's best not to tamper with it.
What are your thoughts on that? Is there any potential harm that can be done with improper warm up?
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Disclaimer: I'm no expert. However, everything I've read indicates that the cold start is purely to warm up the cats. You're really not going to gain much temp in the fluids in one minute of warmup anyways. The only change I made was preventing the car from retarding ignition during warmup.
I'm totally happy I did it. The cold start is still loud-ish, but MUCH more reasonable (and doesn't sound quite as crappy). Haven't noticed any effect on normal driving.