Deck height

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Deck height

Post  bigjohn2007 on March 10th 2013, 2:31 pm

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
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Re: Deck height

Post  FORDMUD on March 10th 2013, 10:43 pm

Mock it up and measure. Go from there.
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Re: Deck height

Post  racnrick on March 10th 2013, 11:31 pm

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.

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Re: Deck height

Post  bigjohn2007 on March 11th 2013, 12:43 pm

thanks so i dont have to put rings on right
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Re: Deck height

Post  69F100 on March 11th 2013, 1:12 pm

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
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Re: Deck height

Post  ThndrChkn on March 11th 2013, 1:36 pm

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...
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Re: Deck height

Post  bigjohn2007 on March 11th 2013, 2:17 pm

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

Post  ThndrChkn on March 11th 2013, 5:41 pm

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...
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Re: Deck height

Post  Lem Evans on March 11th 2013, 6:43 pm

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

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Re: Deck height

Post  bigjohn2007 on March 11th 2013, 8:45 pm

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