clearance, piston to valve @.050 on a stock 2010 5.3 ?
has anybody ever measured it ? or know what it is ?

 

Once you change cams or rockers, stock piston to valve clearance goes out the window. Best way to measure it is to mock it up with light checking springs and old lifters modified to be solids (so the valvetrain achieves max lift without collapsing lifters) and measure. Clay method works best.

Engine Blueprinting: How To Check Piston-to-valve Clearance - EngineLabs

 

just trying to see what the max lift cam can be put in with a short
dur cam. if i was building a new eng i would use the clay method.
been there done that before.

 

valve events is what creates tight P2V...not just lift. you can measure P2V without pulling the heads using checker springs and a dial caliper.

 

what cam are you wanting to run?

 

cam is 210/224 .589/.601 105 +6 CL VVT 114 lobe sep

 

you lost me on the VVT specs. never looked at them. most people on this site ditch the VVT stuff when they do a cam swap

 

Just ditch the VVT, tuning for VVT is an art that no one has spent enough time and effort to make worth it. Plus it limits cam options so much it's insane. Keeping a stock stall and 3.42s at your trucks weight I would go 218/224 .605/.609 LSA113. You will make plenty of power without losing too much bottom end. You have good compression and good heads in a light truck with short tires so you can go more agressive than most. Your power curve will be nice and wide coming in strong around 2500rpm, maxing out around 5800 and carrying to around 6400 before it falls off. A good shift point would be about 6200. These are LS trucks ignore the comp cam factory suggestions and ask a truck guy. If you ever get around to a small stall this cam will be maximized and still very fun as a DD and street friendly.

 

I have a great tuner that's a wiz with VVT cams. I also tow a small
trailer with 2 HD's all over. 2000lbs. and a full bed with tools and suitcases.
so a lose conv is out of the picture.

Gamble, are you saying a .600 lift cam will fit without any VTP probs ?
is there valve reliefs on newer gen-4 5.3 pistons ? it's a LH9 motor,
not much is known about them.

 

a .900 lift cam can clear perfectly fine depending on the valve events.....