whats the diff between sleeved and decked?
03-06-2003, 06:12 AM
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whats the diff between sleeved and decked?
just curious between the diff between sleeved blocks and decked blocks. well i understadn sleeving , but dont fully understadn what decking is .
03-06-2003, 06:25 AM
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Re: whats the diff between sleeved and decked? (itr206)
just curious between the diff between sleeved blocks and decked blocks. well i understadn sleeving , but dont fully understadn what decking is .
Does this help? This is a JG E.D. block that is sleeved and decked...
03-06-2003, 06:29 AM
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Re: whats the diff between sleeved and decked? (Zero_son)
I havnet built it/ran it yet. But I was worried about getting a different block than he stated....its all good so far
i heard that only lasts for a couple weeks though
i heard that only lasts for a couple weeks though
03-06-2003, 07:01 AM
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Re: whats the diff between sleeved and decked? (itr206)
Its raises the level of the sleeve slighty higher than the deck surface of the block. This allows for a tighter crush around the combustion chamber/head gasket area. It helps with sealing. Its standard on ALL GE sleeving.
The optional o-ring is when they add a copper o-ring around the top of the sleeve. This o-ring crushes when the head is tightend to the block, giving the headgasket an even better seal over the standard step deck.
I choose to just run the step deck, and not the o-ring. The o-rings seal better, but if you have to change the headgasket you have to put a new o-ring on the top of the sleeves. Its a pain in the *** to do.
The optional o-ring is when they add a copper o-ring around the top of the sleeve. This o-ring crushes when the head is tightend to the block, giving the headgasket an even better seal over the standard step deck.
I choose to just run the step deck, and not the o-ring. The o-rings seal better, but if you have to change the headgasket you have to put a new o-ring on the top of the sleeves. Its a pain in the *** to do.
03-06-2003, 07:56 AM
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Re: whats the diff between sleeved and decked? (itr206)
Step decking is having the sleeves just slightly higher than the deck surface to get a better seal on the headgasket.
Decking a block is like resurfacing a head, it gives you a true flat surface on the top of the block.
Decking a block is like resurfacing a head, it gives you a true flat surface on the top of the block.
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03-06-2003, 08:42 AM
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Re: whats the diff between sleeved and decked? (boostaholic)
Decking a block is like resurfacing a head, it gives you a true flat surface on the top of the block.
03-06-2003, 10:41 AM
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Re: whats the diff between sleeved and decked? (boostaholic)
Step decking is having the sleeves just slightly higher than the deck surface to get a better seal on the headgasket.
Decking a block is like resurfacing a head, it gives you a true flat surface on the top of the block.
Decking a block is like resurfacing a head, it gives you a true flat surface on the top of the block.
03-06-2003, 05:59 PM
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Re: whats the diff between sleeved and decked? (itr206)
well its getting confising here
maybe i can simplify.... like basically everyone here said there are different uses of the term "decking"
it can be used in reference to milling the top of the block to make sure it has a true flat surface just like you would re-surface a cyl head to make sure it seals...
then there is step decking like boosted hybrid mentioned (he explained it already)
then there is adding a deck plate to your engine which means increasing the height if the engine so that you can increase the stroke and rod length of the engine to keep the same engine geometry (r/s ratio) but increase the displacement of the motor. (usually the bore is already increased when this is done. this is how you get 2.1 or 2.2L b series motors)
ie a GSR motor with 85.5mm bore and a 91mm crank (b20a i belive) would have a 2.1L displacement but the rod/stroke would be horrible... decking the block would allow you to use rods 5% longer to keep the same r/s
maybe i can simplify.... like basically everyone here said there are different uses of the term "decking"
it can be used in reference to milling the top of the block to make sure it has a true flat surface just like you would re-surface a cyl head to make sure it seals...
then there is step decking like boosted hybrid mentioned (he explained it already)
then there is adding a deck plate to your engine which means increasing the height if the engine so that you can increase the stroke and rod length of the engine to keep the same engine geometry (r/s ratio) but increase the displacement of the motor. (usually the bore is already increased when this is done. this is how you get 2.1 or 2.2L b series motors)
ie a GSR motor with 85.5mm bore and a 91mm crank (b20a i belive) would have a 2.1L displacement but the rod/stroke would be horrible... decking the block would allow you to use rods 5% longer to keep the same r/s
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