Head gasket
(→Steel (shim) gaskets) |
(→How to choose a head gasket) |
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This is probably one of the most important areas of engine building and should be considered carefully before ever buying any parts. You must know what the piston deck height (distance from the crown of the piston to the block deck surface with the piston at top dead center) is before continuing. I'll use a 350 Chevy for this explanation. If the piston deck height is, for instance, 0.025", then a gasket with a thickness of 0.015" (Fel-Pro FPP-1094) would put the squish at 0.040". If the piston deck height is, for instance, 0.012", then a gasket with a thickness of 0.028" (GM 10105117) would put the squish at 0.040". Mix and match the piston deck height with the gasket thickness in your particular application to achieve this ideal 0.035" to 0.045" squish. | This is probably one of the most important areas of engine building and should be considered carefully before ever buying any parts. You must know what the piston deck height (distance from the crown of the piston to the block deck surface with the piston at top dead center) is before continuing. I'll use a 350 Chevy for this explanation. If the piston deck height is, for instance, 0.025", then a gasket with a thickness of 0.015" (Fel-Pro FPP-1094) would put the squish at 0.040". If the piston deck height is, for instance, 0.012", then a gasket with a thickness of 0.028" (GM 10105117) would put the squish at 0.040". Mix and match the piston deck height with the gasket thickness in your particular application to achieve this ideal 0.035" to 0.045" squish. | ||
| − | Another consideration is the type of engine, naturally aspirated, supercharged and so on. It's been said that the COMETIC mls (multi-layered steel)gaskets, although relatively expensive, negate the need to "O" ring the block to accommodate higher boost numbers. | + | Another consideration is the type of engine, naturally aspirated, supercharged and so on. It's been said that the COMETIC mls (multi-layered steel) gaskets, although relatively expensive, negate the need to "O" ring the block to accommodate higher boost numbers. |
==Head gasket sealants== | ==Head gasket sealants== | ||
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