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ls3 heads trouble

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Old Mar 14, 2014 | 10:57 PM
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stuck_on_stupid's Avatar
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Default ls3 heads trouble

hello I have a question. I hope im in the right section. I was looking for some ls3 heads for my build im doing and came across this . i am selling my 821 ls cylinder heads. these have been completely rebuilt with all new seats, seals, ls9 intake valves, ls7 springs, retainers, keepers, ls7 rocker arm set up. i also have brand new .051 mls head gaskets. these heads work on any ls engine with a 4 inch bore or larger. perfect for turbo, supercharger or nitrous. asking $950.00 for everything. serious calls only!!. can ls7 rockers fit on ls3 heads. im being told they cant. is he telling the truth? should I pick these up? also this is my first build. new to building motors. this will go on a lq4
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Old Mar 15, 2014 | 02:03 AM
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Nope the LS7 rockers will not work. The 4inch bore of the LQ4 will barely accommodate the LS3 style heads.
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Old Mar 16, 2014 | 05:56 PM
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Originally Posted by Gunslinger09
Nope the LS7 rockers will not work. The 4inch bore of the LQ4 will barely accommodate the LS3 style heads.
As you state the 4" bore barely unshrouds a 2.165" intake valve and the OP
says the heads have the LS9 2.20" intakes....plus an LQ4 with the dished
pistons will be low on compression compared to the LQ9 flat-tops. Certainly
less than ideal.
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