Deck height

How do u get deck height right when building engine? I have block bored 4.420 and want to stroke it.Already have crank,rods,and pistons.Bought the block already bored would like build it myself as i have never done so.Was wondering about deck height so i get it right the first time. thanks john

Mock it up and measure. Go from there.

As previously said, mock it up, the best way to do it is, put a rod and piston in each corner of the block, 1,4,5,&8 and check each corner, as some have found the deck is sometimes not square to the crankshaft centerline. Some will use 4 piston/rods for this and some will use the same rod/piston in all 4 corners.

thanks so i dont have to put rings on right

bigjohn2007 wrote:thanks so i dont have to put rings on right

No you don't have to have the rings on alot easier without the rings or I didn't when I check mine

You don't have to use the rings, but I use masking tape around the ring lands, to make sure the pistons stay fairly square in the bores...

is the pistons most time lower than block and if so what the goal deck height

Your desired deck height will depend on your overall goals ... I try and get mi-ne to - .005... (.005 in the hole) If it's a street app, I'll leave it a little more in the hole to help keep compression lower, though it may affect your quench a little...

X2... I'd leave the piston a little below the deck on a racing engine.

Well I'll be dam i learning a little here.