Quote:
Originally Posted by turbo2ltr
I know asking this will be sacrilege but I like and respect my neighbors.
I have stock everything and it seems the startup is with the NPP open even if it's in the quieter modes. Is there a way to not make the thing abnormally loud on startup? A few seconds later it's quiet so why does the startup have to be so loud even in the quiet modes?
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The reason, as far as I know, is to warm the cats quickly enough to meet stricter recent cold start emission requirements. Your only "official" option, as people advised above, is to enter accessory mode and set the exhaust to stealth mode before you start the car, and even then it won't be quiet, as in, Accord or Camry quiet (which is a good, no, GREAT thing IMO).
Now, as an interesting thought experiment, I do see an option in the tune that allows defaulting the valve state to closed. Has anyone tried this by any chance?
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq
Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune
1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
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