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1slow370 · 04-08-2014, 12:29 AM

Actually CJ the omega is a darton wet sleeved, 2000hp, 7sec 1/4miled, 233mph in the standing mile, still on the original block, engine. I believe they are using a bit of filler in the bottom of it too, but that is from hearsay. Open deck blocks take better to sleeving because Oems design open deck blocks thicker at the base of the cylinders to hold the unsupported cylinder stable. and properly installed sleeves remove very little from the engine that wasn't already unsupported. The cylinder stacks in an open deck block can be shaved down to their bases without affecting the integrity of the block, from there a good sleeve install will only over bore cylinder hole near the mains just enough for the engagement of the sleeve and no deeper, so that the mains area can remain intact. Wet sleeves installed wrong and used in applications they shouldn't be weaken the block, but when the sleeve is designed for the engine, as the vq sleeves are, and the machining and installation is done properly, the block will be strengthened not weakened.

Edit: also as for the 7 individual pieces stuff, the darton sleeves when machined and installed correctly are heat shrunk into the block so that even under operating temps the sleeve remains captured in the block, the compresion on the head gasket also serves to force the sleeves down tight against the counterbore made during install in the bottom of the cooling jacket. Also industry uses the wet sleeve technique often due to the common use of very large diesel engines, CAT has several wetsleeved industrial diesels that rack up run times in the thousands of hours before needing rebuilds.

As I said for a closed deck block I personally stick to dry sleeving it, not that wet sleeves can't be done but it takes more work to get it right, wet sleeves are still hard on headgaskets, but when done properly they are a great way to reinforce a block to see higher cylinder pressures.

Also the main advantage of the sleeves is not the strength of them put the fact that you can run 100mm plus bore sizes for more displacement, on the omega they go from 3799cc to 4166cc

04-08-2014, 12:29 AM	#25 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7250	Actually CJ the omega is a darton wet sleeved, 2000hp, 7sec 1/4miled, 233mph in the standing mile, still on the original block, engine. I believe they are using a bit of filler in the bottom of it too, but that is from hearsay. Open deck blocks take better to sleeving because Oems design open deck blocks thicker at the base of the cylinders to hold the unsupported cylinder stable. and properly installed sleeves remove very little from the engine that wasn't already unsupported. The cylinder stacks in an open deck block can be shaved down to their bases without affecting the integrity of the block, from there a good sleeve install will only over bore cylinder hole near the mains just enough for the engagement of the sleeve and no deeper, so that the mains area can remain intact. Wet sleeves installed wrong and used in applications they shouldn't be weaken the block, but when the sleeve is designed for the engine, as the vq sleeves are, and the machining and installation is done properly, the block will be strengthened not weakened. Edit: also as for the 7 individual pieces stuff, the darton sleeves when machined and installed correctly are heat shrunk into the block so that even under operating temps the sleeve remains captured in the block, the compresion on the head gasket also serves to force the sleeves down tight against the counterbore made during install in the bottom of the cooling jacket. Also industry uses the wet sleeve technique often due to the common use of very large diesel engines, CAT has several wetsleeved industrial diesels that rack up run times in the thousands of hours before needing rebuilds. As I said for a closed deck block I personally stick to dry sleeving it, not that wet sleeves can't be done but it takes more work to get it right, wet sleeves are still hard on headgaskets, but when done properly they are a great way to reinforce a block to see higher cylinder pressures. Also the main advantage of the sleeves is not the strength of them put the fact that you can run 100mm plus bore sizes for more displacement, on the omega they go from 3799cc to 4166cc __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50 Last edited by 1slow370; 04-08-2014 at 12:47 AM.