compression height?

[zeekracing]

I have deciede on which way to do the stroker. 258 crank and rods, 30 over pistons. I was checking out summit racing for pistons. They had three choices for the compression height: 1.585, 1.592, 1.581. I have not got a block yet but I don't plan on decking the block unless it is needed. What is the stock height? Which one do I need to go with?

[dwg86]

The stock height is some where around 1.601... I think. The 1.592 will be the closest to the deck, out of the 3 choices, but will still be around .038 below the deck.

[woodjeep]

I have the silvolite 3241 hc pistons in my build. The pin height is 1.592 which gave me a .035 deck height . I did not shave the head for quench. When i gave the block to my machine shop..SK Speed on long Island, I asked about shaving and quench and he looked at me like I had 2 heads. He asked how many rpm's i would normally run this at and when i told him it would probably never see 3000 he laughed and said I would not have to begin to worry untill I passed 6000. Then I laughed and told him it would see that for a second or 2 as it was exploding . It's not going in until the spring so its only half built. The crank/pistons and cam are in,,The heads done but the pan is not on so I can lube the cam closer to the install date

[SilverXJ]

Compression height is pin height. Not sure what you are asking. As for the deck clearance you don't have to start to worry about piston to head collisions until, .040"

[dwg86]

I have the silvolite 3241 hc pistons in my build. The pin height is 1.592 which gave me a .035 deck height . I did not shave the head for quench. When i gave the block to my machine shop..SK Speed on long Island, I asked about shaving and quench and he looked at me like I had 2 heads. He asked how many rpm's i would normally run this at and when i told him it would probably never see 3000 he laughed and said I would not have to begin to worry untill I passed 6000. Then I laughed and told him it would see that for a second or 2 as it was exploding . It's not going in until the spring so its only half built. The crank/pistons and cam are in,,The heads done but the pan is not on so I can lube the cam closer to the install date

You shave the block to get a better quench. I don't understand what your machinist is saying. I would think you will have more problems with detonation with a larger quench and with your engine running at a lower speed under a load. For example pulling a load going up hill. I am no expert but I had to run 89 octane in my stock 4.0 after I put a cold air intake on it, or it would ping bad. My stroker has less quench, .043, and higher compression, and I can run 87 octane pulling a load with no detonation.