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- Bore_pitch abstract "Bore pitch is the distance between the centerline of a cylinder bore to the centerline of the next cylinder bore adjacent to it in an internal combustion engine. It's also referred to as the \"mean cylinder width\", \"bore spacing\", \"bore center distance\" and \"cylinder spacing\".The bore pitch is always larger than the inside diameter of the cylinder (the bore and piston diameter) since it includes the thickness of both cylinder walls and any water passage separating them. This is one of the first dimensions required when developing a new engine, since it limits maximum cylinder size (and therefore, indirectly, maximum displacement), and determines the length of the engine (L4, 6, 8) or of that bank of cylinders (V6, V8 etc.).In addition, the positions of the main bearings must be between individual cylinders (L4 with 5 main bearings, or L6 with 7 main bearings - only one rod journal between main bearings), or between adjacent pairs of cylinders (L4 with 3 main bearings, L6 or V6 with 4 main bearings, or V8 with 5 main bearings - two rod journals between main bearings).In some older engines (such as the Chevrolet Gen-2 \"stovebolt\" 216, 235 & 261 L6, the G.M.C. 228, 236, 248, 256, 270 & 302 L6, the Buick 320 L8, and the Chrysler \"Slant 6\" 170, 198 & 225) the bore pitch is additionally extended to allow more material between the main bearing webs in the block. For example, in an L6 the first pair (#1 & 2), center pair (#3 & 4), and rear pair (#5 & 6) of cylinders that share a pair of main bearings have a smaller pitch than between #2 & 3 and #4 & 5 that \"bridge\" a main bearing.Since the start-up expense of casting an engine block is very high, this is a strong incentive to retain this dimension for as long as possible to amortize the tooling cost over a large number of engines.If and when the engine is further refined, modified or enlarged, the bore pitch may be the only dimension retained from its predecessor. The bore diameter is frequently increased to the limit of minimal wall thickness, the water passage is eliminated between each pair of adjacent cylinders, the deck height is increased to accommodate a longer stroke, etc. but in general if the bore pitch is the same, the engines are related.As an example of development, the Chrysler 277\" polyspheric V8, first introduced in 1956, was gradually increased in size by bore and stroke to 326\" by 1959, then received a drastic make-over in 1964 to conventional \"wedge\" combustion chambers, then modified again for stud-mounted rocker arms, and finally underwent an even greater re-design to become the modern 5.7 liter hemi. All of these engines retain the original 4.460\" bore pitch distance set down in 1956.".
- Bore_pitch wikiPageID "21441792".
- Bore_pitch wikiPageLength "3547".
- Bore_pitch wikiPageOutDegree "8".
- Bore_pitch wikiPageRevisionID "545565062".
- Bore_pitch wikiPageWikiLink Bore_(engine).
- Bore_pitch wikiPageWikiLink Buick_Straight-8_engine.
- Bore_pitch wikiPageWikiLink Category:Engine_technology.
- Bore_pitch wikiPageWikiLink Chevrolet_straight-6_engine.
- Bore_pitch wikiPageWikiLink Chrysler_A_engine.
- Bore_pitch wikiPageWikiLink Chrysler_Slant-6_engine.
- Bore_pitch wikiPageWikiLink Internal_combustion_engine.
- Bore_pitch wikiPageWikiLink Stovebolt.
- Bore_pitch wikiPageWikiLinkText "Bore pitch".
- Bore_pitch wikiPageWikiLinkText "bore pitch".
- Bore_pitch wikiPageWikiLinkText "bore spacing".
- Bore_pitch wikiPageUsesTemplate Template:Reflist.
- Bore_pitch wikiPageUsesTemplate Template:Unreferenced.
- Bore_pitch subject Category:Engine_technology.
- Bore_pitch hypernym Distance.
- Bore_pitch type Agent.
- Bore_pitch comment "Bore pitch is the distance between the centerline of a cylinder bore to the centerline of the next cylinder bore adjacent to it in an internal combustion engine. It's also referred to as the \"mean cylinder width\", \"bore spacing\", \"bore center distance\" and \"cylinder spacing\".The bore pitch is always larger than the inside diameter of the cylinder (the bore and piston diameter) since it includes the thickness of both cylinder walls and any water passage separating them.".
- Bore_pitch label "Bore pitch".
- Bore_pitch sameAs Q4944767.
- Bore_pitch sameAs ボアピッチ.
- Bore_pitch sameAs m.05f98j1.
- Bore_pitch sameAs Q4944767.
- Bore_pitch wasDerivedFrom Bore_pitch?oldid=545565062.
- Bore_pitch isPrimaryTopicOf Bore_pitch.