NPP Question

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Sep 29, 2014 | 10:40 PM

rixvette

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Racer

Joined: Apr 2010

Posts: 379

Likes: 2

From: Naples FL

NPP Question

I noticed that the NPP sound in sport mode changes when I shift into 5-7 gears. Sound is more like touring mode. Is it designed that way?

Sep 29, 2014 | 11:26 PM

xp800

Drifting

Joined: Jun 2007

Posts: 1,425

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From: Macomb MI

Quote:

Originally Posted by rixvette

I noticed that the NPP sound in sport mode changes when I shift into 5-7 gears. Sound is more like touring mode. Is it designed that way?

What do the RPMs drop to when you upshift? Even with engine sound management off, the NPP valves typically close under 1700RPM in upper gears. Try pulling fuse 41 in the engine fuse box and see the difference.

See the thread here:

https://www.corvetteforum.com/forums...ck-result.html

Sep 30, 2014 | 07:41 AM

rixvette

Thread Starter

Racer

Joined: Apr 2010

Posts: 379

Likes: 2

From: Naples FL

Quote:

Originally Posted by xp800

Thanks. That explains what is going on. I just installed a supercharger and it has so much power I am trying to figure out the differences from before.

I did try searching the forum but did not find your write up.

Thanks.

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