Hey guys, I have a 2003 Silverado Z71 Regular Cab/Short Bed getting a LQ4 short block with LS3 heads and a ZL1 blower going into it (along wits LS9 head gaskets, head studs, etc). The truck has factory 3.73 gears and 31" tall tires. At the minimum I am going to run a LS9 cam, but I am thinking about going with a BTR Stage 1 or Stage 2 blower cam instead.

http://www.briantooleyracing.com/btr...am-motion.html

http://www.briantooleyracing.com/btr...am-motion.html

This is my daily driver, tows my car trailer sometimes too. The truck is getting a built 4L80e transmission along with a 11" Circle D converter in the 2600-2800 stall range too.

 

I'll be honest, the stage 2 that I have is lazy at part throttle. It comes alive with more throttle and is really strong on top, but I think if I had it to do again I would have gone with something that had a bit more low end torque than the BTR cams made for PD blower cars.

 

I am sure the lobe separation angle on the BTR PD cams might be the reason why they are lazy down low or part time/no boost cruising.

What cam would you have gone with, hind sight 20/20?

 

Yea the stage 2 is a very aggressive cam with mild idle manners. It WILL hurt your bottom end power. It has VERY extreme valve events.

Stage 1 all day long in your truck that you tow wth. I'll even go a step further and say a custom grind would be better than that.

 

And don't bother with the ls9 cam.

 

Yup exactly. It's cheap, but it will make your truck soggy as hell out of boost. Its even fairly weak down low while in boost. Put it this way, even CTS V guys complain about loss of bottom end power with that cam.