[Z06] Zo6 question
Thread Starter
Racer
Joined: Oct 2012
Posts: 431
Likes: 2
From: Kennesaw Georgia
Zo6 question
It seems like my car is louder in the morning when first cranking up, but as it reaches operating temps it quiets down some. Not a huge difference but noticeable. Does this have something to do with the air pump/emission stuff?
2001 zo6
Long tubes
Catted x pipe
b&b catback
2001 zo6
Long tubes
Catted x pipe
b&b catback
Melting Slicks
Joined: Jul 2010
Posts: 3,355
Likes: 113
From: Los Angeles
Well the idle RPM is a little higher than usual on cold starts, and then it drops down to 725 (or 750, or whatever it is) once the coolant reaches a certain temperature. That's probably the main thing. Another factor could be that parts of the engine expand slightly as it warms, so gaps between parts shrink, thus resulting in a smoother operating engine.
Instructor
Joined: Sep 2006
Posts: 134
Likes: 2
From: Bloomington Illinois
Well the idle RPM is a little higher than usual on cold starts, and then it drops down to 725 (or 750, or whatever it is) once the coolant reaches a certain temperature. That's probably the main thing. Another factor could be that parts of the engine expand slightly as it warms, so gaps between parts shrink, thus resulting in a smoother operating engine.
Pro
Joined: Aug 2006
Posts: 548
Likes: 8
From: Lexington KY
Mine does the same 01 Z same set up that u have except for deleted cats ... I still have the air pump in it decided to keep it when I was putting my LT's on . I definetly can hear it at cold start up then after min it quiets down ... The only thing I don't like is for some reason I can hear the ticking valve noise up until my oil reaches past 100 degrees I know it's a lot louder because of the headers ... Does your sound like that too?
Thread Starter
Racer
Joined: Oct 2012
Posts: 431
Likes: 2
From: Kennesaw Georgia
Haha, yeah unfortunately I hear the ticking also. Longtubes make it way worse but I really dislike it. It sounds like sh$t. Sometimes I think something's wrong with a lifter or valvespring, but it's done it ever since the longtubes. Plus the car runs really strong so I guess it's fine
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Pro
Joined: Aug 2006
Posts: 548
Likes: 8
From: Lexington KY
The way I do it I let it warm up good then drive and when the oil reaches 160F I hit it!! Not wot not yet just half way Talking about beast !! I'm goona wait until I get it dyno tuned ? Drove it to gym last night the temp outside was around 30F .,, man you got to love the sound my b&bs make its awesome ...they sound totally different during hot days .. How does yours do?