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need help on new engine build!!!

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Old 03-02-2010, 08:15 PM
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Default need help on new engine build!!!

i have a 6.0l bored .030 over, flat top pistons (stock stroke) with 5.3l heads ported and polished milled .060 and im having problems breaking springs. i have comp 7.4 pushrods and i think theyre the wrong size. can anyone help me out? also whats the compression ratio on the engine with this setup? thanks

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Old 03-02-2010, 08:34 PM
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Ummm you mean you have 4.00 pistons in a 4.030 bore?? Get a PR checker cause those PR's are too long milled .060. Is the valvetrain noisy? I am pretty sure you are are bottoming out the plunger on the lifters and they will soon fail too. Also check the spring installed height....

What cam specs and springs????
Old 03-02-2010, 08:37 PM
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Originally Posted by SOMbitch
Ummm you mean you have 4.00 pistons in a 4.030 bore?? Get a PR checker cause those PR's are too long milled .060. Is the valvetrain noisy? I am pretty sure you are are bottoming out the plunger on the lifters and they will soon fail too. Also check the spring installed height....

What cam specs and springs????
g5x3 cam comp 918 springs and the pistons are from a 6.2l
Old 03-02-2010, 08:41 PM
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Originally Posted by SOMbitch
Ummm you mean you have 4.00 pistons in a 4.030 bore?? Get a PR checker cause those PR's are too long milled .060. Is the valvetrain noisy? I am pretty sure you are are bottoming out the plunger on the lifters and they will soon fail too. Also check the spring installed height....

What cam specs and springs????
fixed sorry i meant stock stroke
Old 03-02-2010, 09:12 PM
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bump for more help




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