Hey guys! I have looked on Summit for a set of piston rings, but unfortunately they only offer piston and piston ring kits. I can't just buy the piston rings, because I also have to buy the pistons, which I already have. I'm running Keith Black Hypereutectic Pistons in my Ford 7.5 Liter 460 V8. I have the D3VE-A2A heads. I was looking at a few different brands, though, around on the internet, but dang it's hard to find moly rings for this motor. The only place I found moly rings were the Sealed Power Premium Moly Piston Rings through Advance Auto Parts. Have you all ever used this brand? Do they work and will they last?


Also, I'm curious about decking the block, because I want the perfect quench and I want to give my engine builder the exact numbers. The pistons I am running can be seen through the link below.


-http://www.summitracing.com/parts/uem-kb137ktm-040/overview/make/ford


They say these pistons produce a 10:0:1 compression ratio with 82 CC heads and a 9:7:1 with 97 CC heads, which I believe is what I have. I have complete factory D3VE-A2A heads that haven't been decked, shaved, or nothing. They say these pistons produce this much compression on all factory heads, no shaving, or decking the block and only on piston alone. So do you think I should leave the block alone and not deck it at all, and possibly just shave the heads to there max? Which is 0.025? Or should I zero deck the block and only shave the heads what they need to be flat? The compression ratios these pistons assume to produce seem to me like all I need is to leave the block alone and only shave the heads to be flat.


Let me know your opinion guys! Thanks!

 

You won't get quench with the pistons .030 in the hole.
(The head gasket is already fourty thou, quench is 45 or less...)

And at zero deck those pistons are going to have you over 10:1 (even with uncut heads)
That's why I told you to cc the heads after the port & polish, account for gasket and determine how much dish you need for whatever compression ratio you want.
You don't want to cut the heads -at all- if you already need more dish to bring the CR down.

Also keep in mind -depending on the cam and cam timing- you may (likely) have to cut valve clearance in those pistons.
Doing this sixteen times (8 cylinders x 2 valves) gets costly at the machine shop.

You don't give the machine shop a measurement.
You give them the crank, bearings, caps, a rod and piston.
They mock it up at each corner and zero cut the decks parallel to the crank axis.