continuously variable valve timing

[skunkstripe]

2014 Chevy Silverado. OK got the understanding of the AFM. And the G80 locker. Thanks to people on this site. Now can someone explain what continuously variable valve timing. Is thanks.

 

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[MikeNH]

This is from a 2011 spec sheet but it should be the same on the new trucks. Read the section titled "Camshaft Phasing".

 

http://www.gmpowertrain.com/PowertrainFiles/Engine/Stories/11_LC9 Gen IV.doc

[skunkstripe]

Thanks

 

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[Stex]

http://www.linkecu.com/support.old/geninfoarticles/camcontrolinfo

 

I think the GM system also uses oil as mentioned in the link to control the cam position and a reason to run what GM recommends which is now 0-20 for the K-2s

[ChrisNJ]

In short, camshaft selection and camshaft timing is always a compromise. It's why a race car doesn't idle well, but has the most hp it can make for that engine configuration at say 6Krpm. Need it to idle well? Then it won't make the most hp at 6K rpm. Variable valve timing is just that, but it is not perfect, it just helps.