Can you cut the Hyperjunk pistions (OE) in the car, to make room for larger cam if your P/V clearnce is to close,

What tool would you need....
is this a wast of time??????

 

In order to do that, if you even can, you would have to take the piston out, which involves unbolting the connecting rod from the bottom, in which you have to take the oil pan off.

If you were to do all that, you might as well buy new pistons with the size valve relief that you want already cut in them, buy new rings and connecting rod bearings and some ARP bolts for your connecting rods, along with new head gaskets.

You might as well take the engine out and bore it .030 over while your at it.

But that's just me and I seem to get a little carried away at times.

 

There is a tool thart will let you do it in engine - I believe Inksy makes it.

You can also use a dremel - depends on how much and where you need,

Measure first - I'm running over.6 lift with 2.055 valves and have no V2P issues although the gap between valve lip and relief is very close.

 

I'd be worried about rough spots as well as throwing the rotating assembly out of balance. Better to go with a new set of pistons, IMO. If that isn't an option, you might be able to retard or advance the cam to give the valves a little more time to open/close before the piston closes them.

 

It can be done and Isky makes a tool to do it with. Pretty common place on LS1 motors. As for doing it to stock LT1 pistons... rarely needed unless you are running some pretty big valves and the increased radius of the valve is an issue. As for 1.94 or 2.00 inch valves, stock pistons tend to have LOTS of room.
I'm running a big cam with a fairly early opening timing and piston to valve was no problem with my stock piston and factory heads milled .010".
Remember that gross valve lift #'s aren't the issue with piston to valve clearance, it's the cam timing/lift near TDC that is the concern.
Steve...

 

Here's the problem, LT1 pistons are weak pieces of junk to begin with. Cutting into them doesn't make them any stronger.

Buy the right pistons instead of doing the "band-aid" routine.