Cosworth Head Gasket 1.5mm vs 1.8mm?

[s13_maJiK]

I'm looking at getting my head gasket and was looking at the cosworth and noticed that you can get two different thicknesess, what is the big differences between the thicknesess? Does it hold pressure more?1.8mmhttp://www.frsport.com/Coswort....htmland tthe 1.5mmhttp://www.frsport.com/Coswort....html

[s13_maJiK]

K I found out that the thinner the head gasket the lower the compression, and the thicker the more compression.

[Hijacker]

You have that backwards

[s13_maJiK]

you sure? Because if you have a thinner gasket the head sits lower and makes the pistons travel higher into the head thus making there less area for compression, and a thicker gasket makes the head sit higher so the pistion has less travel into the head and has more compression area

[hungryjoseph]

compress ion. thicker hg = head sits up higher, bigger volume for compression, which means it doesn't compress as much because the volume is bigger, which means lower compression, you have it completely backwards, what you said makes no sense. and it's volume, not area

[Hijacker]

To make a note, the piston does not travel into the head. On our motors, it comes even to the block deck, and then it has a dish in it as well. When you're compressing air, you're taking a cylinder full of air and squeezing it into a smaller space. If you have a thicker headgasket, there's more space to squeeze into, making your ratio less. If your gasket is thinner, there's less space to squeeze into.

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[DrifterProdigy85]

1.5mm lowers compression .2 over stock. 1.8mm lowers compression .4 over stock.

[s13_maJiK]

yea my bad your right my I just interpreted stuff wrong, thanks for the fixx