Just got off the phone with comp cams. I called them to get their opinion on a cam upgrade for my truck. I was told that they currently don't have any cams available for my truck because "the newer late model engines use a different core." I am new to cams and don't really understand a lot about them. But my question is do any of you know of a cam combo that work in my truck. The engine is a 5.3 flex fuel with displacement on demand. The engine is stock expect for a p1sc procharger running 8-9lbs, 42lb injectors and a boost a pump. Sorry if this is a newbie question but I was under the impression that there were cams available for my truck.

 

they are. i would choose a grind close to a gt2-3 cam for the charger. let me see if i can find you some reading material...

 

https://www.performancetrucks.net/fo...play.php?f=188


copy/paste your question here... lots of good info for the NNBS trucks.

 

thanks, I'll check it out. BTW what does NNBS mean, it wasn't on the acronym thread?

 

New New Body Style.
The old motors, lol, used a 3 bolt cam gear setup. ie 3 bolts to attach the gear to the cam. The new motors use a 1 bolt cam gear. ie 1 bolt to attach the gear to the cam.

Do you have a VVT motor (Variable Valve Timing)? I think that's a different animal as well. I'm sure someone will correct me if i'm wrong

 

I forgot to mention. I have AFM, but not VVT. My first cam was a regrind on a stock core. It was a single bolt cam. My new cam is a 3 bolt cam. You can use the 3rd gen cams with a Z06 cam sprocket and they will work. I have the part numbers at home or you can just do a search on here.

 

Not sure if mine is a VVT, how can I find out? Feel like it probably is.

 

from wat i know of, all 5.3s come without VVT.. its the 6.0s and 6.2s that use the VVT..

ive upgraded my cam to a xr265hr comp cams...just changed out the cam gear for a gen3 and i was off....no dtcs, nothing

 

5.3 doesn't have VVT

 

Ok good to know. Sounds like the guys at comp cams was full of it. Shouldn't be that hard to find a replacement cam then, right?