Sleeve to 2.8l?
#1
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Is it possible to just bore and sleeve to 104mm. That would make a 2.8l but can i work with the stock head and crank? Or does it require much more?
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You can go big bore using the 2.5 crank and cylinder head yes. You would need 104mm pistons obviously. There are engines here that are bored out and sleeved to 104mm. I went the Darton MID sleeves route but others have gone the route you seem to be looking at.
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http://208.64.137.131/*andersonmotor...l_highperf.htm
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Sid - David Floyd had good success with RollsRoyce Chromoly sleeves. He went to 106 mm with them on a 2.5L block. Have you any experience with them or know anything about them?
http://208.64.137.131/*andersonmotor...l_highperf.htm
http://208.64.137.131/*andersonmotor...l_highperf.htm
I hadn't researched them, but I went with ductile iron flanged sleeves and a 105.5 bore and there is not much original material left. If it has been done successfully then great. I just don't see it myself.
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Sid - David Floyd had good success with RollsRoyce Chromoly sleeves. He went to 106 mm with them on a 2.5L block. Have you any experience with them or know anything about them?
http://208.64.137.131/*andersonmotor...l_highperf.htm
http://208.64.137.131/*andersonmotor...l_highperf.htm
Chromolly sleeves work very well, I would just stay in the 104mm range and do a hybrid stroker like you two are having success with
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I talked to a PHd Structural Engineer about this very question. He said is is more complicated in that simply you would want the thickest sleeve possible as iron is stiffer than aluminum but the thicker you go on the sleeve the more you compromise the foundation/fixed point for the cylinder. In general if you have a 3L block or a filled block you should be able to go thicker on the sleeve. Another consideration is the location of the HG seal ring. Really we need someone to do an FEA analysis.
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I talked to a PHd Structural Engineer about this very question. He said is is more complicated in that simply you would want the thickest sleeve possible as iron is stiffer than aluminum but the thicker you go on the sleeve the more you compromise the foundation/fixed point for the cylinder. In general if you have a 3L block or a filled block you should be able to go thicker on the sleeve. Another consideration is the location of the HG seal ring. Really we need someone to do an FEA analysis.
You start with the ratio of parent material (Alusil) to Sleeve material (Steel) but then you get into the root of the alusil cylinders (floor of the block) and its ability to stabilize the cylinder...follow that up with issues regarding differential expansion rates, sleeve to parent material boundaries (for both heat transfer and long term stability) and then you can try and start to model the alusil casting irregularities (porosity and thickness variations - keep in mind that the stock cylinders actually taper and get wider towards the bottom due to casting release issues)....ummm, yeah, its a little complex....
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You would have to very good at FEA to handle this one!
You start with the ratio of parent material (Alusil) to Sleeve material (Steel) but then you get into the root of the alusil cylinders (floor of the block) and its ability to stabilize the cylinder...follow that up with issues regarding differential expansion rates, sleeve to parent material boundaries (for both heat transfer and long term stability) and then you can try and start to model the alusil casting irregularities (porosity and thickness variations - keep in mind that the stock cylinders actually taper and get wider towards the bottom due to casting release issues)....ummm, yeah, its a little complex....![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
You start with the ratio of parent material (Alusil) to Sleeve material (Steel) but then you get into the root of the alusil cylinders (floor of the block) and its ability to stabilize the cylinder...follow that up with issues regarding differential expansion rates, sleeve to parent material boundaries (for both heat transfer and long term stability) and then you can try and start to model the alusil casting irregularities (porosity and thickness variations - keep in mind that the stock cylinders actually taper and get wider towards the bottom due to casting release issues)....ummm, yeah, its a little complex....
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You would have to very good at FEA to handle this one!
You start with the ratio of parent material (Alusil) to Sleeve material (Steel) but then you get into the root of the alusil cylinders (floor of the block) and its ability to stabilize the cylinder...follow that up with issues regarding differential expansion rates, sleeve to parent material boundaries (for both heat transfer and long term stability)
You start with the ratio of parent material (Alusil) to Sleeve material (Steel) but then you get into the root of the alusil cylinders (floor of the block) and its ability to stabilize the cylinder...follow that up with issues regarding differential expansion rates, sleeve to parent material boundaries (for both heat transfer and long term stability)