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The Terminator
Terminator Talk
Ford 5.3 big bore stroker
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<blockquote data-quote="SlowSVT" data-source="post: 15322766" data-attributes="member: 20202"><p>Good luck getting Ed in here. I would have to insult him pretty badly on this site and in a very public manner even then that would likely result in a phone call filled with hurtful words :nonono: </p><p></p><p>For a mild FI street car built for longevity I don't think you will find a better block for a 4.6 than a Boss. The improved cap register, solid bearing bulkheads (not webbed), siamesed bores and higher grade alloy make for a rock solid foundation for any 4.6 with durability in mind. The problem is iron has very little sense of humor to movement and will crack if provoked. But the beauty of that is the stuff hardly moves under both mechanical AND thermal load which holds everything in alignment spinning inside better. That linebore you thought was within .0005 ain't there at 900 hp. Aluminum on the other hand is more like a rubber band and can (and will) flex a lot more before it yields which is why you don't run extreme power levels with an iron block....... the extra 24 cubes don't hurt either if your making 1.5 hp per cube you can add that to the math plus you can unshroud the valves for better breathing. From experience I would not be surprised to find a well cared for 650 hp Boss block with 100K on the clock can get way with a just flexi-hone scratched cylinders and no machining at rebuild time. I know I'm not saying anything here you don't already know, this was more for any hapless nube who stumbles onto the paragraph and makes for good dialog.</p><p></p><p>I know nothing of Livernois 232 but have heard nothing but good things about the company. Any stroked 4.6 will have longevity problems regardless of who builds it there is no getting away from it a PhD will lose that argument. I can't see the logic of compromising the dynamics of this engine to gain another 20 cubes. Funny thing is a stock stroke 3.7" bore engine is the only undersquare mod motor on the planet! Undersquare is always better then oversquare I always say.</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 15322766, member: 20202"] Good luck getting Ed in here. I would have to insult him pretty badly on this site and in a very public manner even then that would likely result in a phone call filled with hurtful words :nonono: For a mild FI street car built for longevity I don't think you will find a better block for a 4.6 than a Boss. The improved cap register, solid bearing bulkheads (not webbed), siamesed bores and higher grade alloy make for a rock solid foundation for any 4.6 with durability in mind. The problem is iron has very little sense of humor to movement and will crack if provoked. But the beauty of that is the stuff hardly moves under both mechanical AND thermal load which holds everything in alignment spinning inside better. That linebore you thought was within .0005 ain't there at 900 hp. Aluminum on the other hand is more like a rubber band and can (and will) flex a lot more before it yields which is why you don't run extreme power levels with an iron block....... the extra 24 cubes don't hurt either if your making 1.5 hp per cube you can add that to the math plus you can unshroud the valves for better breathing. From experience I would not be surprised to find a well cared for 650 hp Boss block with 100K on the clock can get way with a just flexi-hone scratched cylinders and no machining at rebuild time. I know I'm not saying anything here you don't already know, this was more for any hapless nube who stumbles onto the paragraph and makes for good dialog. I know nothing of Livernois 232 but have heard nothing but good things about the company. Any stroked 4.6 will have longevity problems regardless of who builds it there is no getting away from it a PhD will lose that argument. I can't see the logic of compromising the dynamics of this engine to gain another 20 cubes. Funny thing is a stock stroke 3.7" bore engine is the only undersquare mod motor on the planet! Undersquare is always better then oversquare I always say. [/QUOTE]
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