will milling heads throw off intake port alignment?
12-09-2011, 12:48 AM
#1
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will milling heads throw off intake port alignment? Never really thought of it till I mentioned milling my heads to my dad. His response was to just get domed pistons. Being as how milling the heads brings them down wouldn't it make the head ports sit lower than the intake ports and have sealing problems? Or is the milling nowhere near enough to make a difference?
I ask because i plan to go e85 and had a set of weisco pistons picked out and was going to have the heads milled to bring it up to 12:1 comp. But I don't see a + cc piston to bring it up if I leave the heads alone.
Anyone care to cure my doubts?
I ask because i plan to go e85 and had a set of weisco pistons picked out and was going to have the heads milled to bring it up to 12:1 comp. But I don't see a + cc piston to bring it up if I leave the heads alone.
Anyone care to cure my doubts?
12-09-2011, 01:21 AM
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I heard anything .025 + will have problems with flexing the intake and may lead to sealing issues. When I had a set of 243's done by TEA I was recommended to go .020-.022 max.
12-09-2011, 05:11 AM
#4
Never really thought of it till I mentioned milling my heads to my dad. His response was to just get domed pistons. Being as how milling the heads brings them down wouldn't it make the head ports sit lower than the intake ports and have sealing problems? Or is the milling nowhere near enough to make a difference?
I ask because i plan to go e85 and had a set of weisco pistons picked out and was going to have the heads milled to bring it up to 12:1 comp. But I don't see a + cc piston to bring it up if I leave the heads alone.
Anyone care to cure my doubts?
I ask because i plan to go e85 and had a set of weisco pistons picked out and was going to have the heads milled to bring it up to 12:1 comp. But I don't see a + cc piston to bring it up if I leave the heads alone.
Anyone care to cure my doubts?
12-10-2011, 10:11 AM
#7
there are plenty of pistons that offer a huge dome. check sdparts - i know i've seen some there.
however, you can get awfully close to 12:1 using the factory ls1 piston with a milled head and thin gasket. just don't get a huge cam in there or your pistons and valves will be fighting for space.
however, you can get awfully close to 12:1 using the factory ls1 piston with a milled head and thin gasket. just don't get a huge cam in there or your pistons and valves will be fighting for space.
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12-10-2011, 03:41 PM
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there are plenty of pistons that offer a huge dome. check sdparts - i know i've seen some there.
however, you can get awfully close to 12:1 using the factory ls1 piston with a milled head and thin gasket. just don't get a huge cam in there or your pistons and valves will be fighting for space.
however, you can get awfully close to 12:1 using the factory ls1 piston with a milled head and thin gasket. just don't get a huge cam in there or your pistons and valves will be fighting for space.
