Thinner head gasket OR Milling Heads?
11-14-2005, 03:43 PM
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Thinner head gasket OR Milling Heads? Does milling the Heads have the same result as putting a thinner Head Gasket? Which way is the best to achieve more compression? Deck the block? Shave the heads241? or Thinner head gaskets (cometics)?
11-14-2005, 07:16 PM
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If I remember correctly I think the basic rule of thumb is for every .005 you take out of the gasket is equal to .0075 milling the head. Both are removing 1 cc from the chamber. Therefore the choice is basically up to you, both will impact valvetrain geometry and p to v clearance. The only real difference is that changing the gasket will impact your quench.
11-14-2005, 08:00 PM
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As above: Within reason, you should use a thinner gasket, down to whatever minimum squish height (see relevent thread) you are comfortable with. This will give a greater CR gain than the same amount off the head, because the chamber is less than a full circle. (it's the 'air' you machine that reduces chamber voume) as well as the benefit of better squish.
11-14-2005, 08:23 PM
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Originally Posted by MadBill
As above: Within reason, you should use a thinner gasket, down to whatever minimum squish height (see relevent thread) you are comfortable with. This will give a greater CR gain than the same amount off the head, because the chamber is less than a full circle. (it's the 'air' you machine that reduces chamber voume) as well as the benefit of better squish.
11-15-2005, 11:56 AM
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What would be the optimum quench distance? I would like to raise my compression to 11:1 and I have 241 heads that I plan on getting ported here locally. Since my motor is just a long block right now any changes are easily made. I also have a TSP225 cam that I haven't installed yet.
