does removing rocker bolt (bosses) on stock ls1 heads give greater cfm?
05-21-2012, 02:21 PM
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does removing rocker bolt (bosses) on stock ls1 heads give greater cfm? hey everyone im getting my heads port & polished and the shop doing it doesnt want to remove the rocker bolt bosses because they say it wont give much advantage?? or it doesnt make a big difference is that true?
05-21-2012, 02:41 PM
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05-21-2012, 06:07 PM
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i know some will disagree,but only when you start to move some big air does it really help.biggest restrictions are going to be just below the valve/bowl area and then the guide boss.just go with what the shop recommends..
05-21-2012, 07:12 PM
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05-21-2012, 11:40 PM
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Sounds like your shop doesn't know much about LS heads.
Will it make a big difference? NO
But that is the trick where attention to details makes a difference here and there and eventually (looking at the bigger picture) the difference between an average porter and a specialized professional.
Will it make a big difference? NO
But that is the trick where attention to details makes a difference here and there and eventually (looking at the bigger picture) the difference between an average porter and a specialized professional.
05-22-2012, 06:04 PM
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Exactly yeah i think i made a mistake, he cant find the valve guides either he gave me some dimensions to look up, i honestly can find them either. theyre outside diameter is .502 ands inside is .335 and legnth is 1.980????
Sounds like your shop doesn't know much about LS heads.
Will it make a big difference? NO
But that is the trick where attention to details makes a difference here and there and eventually (looking at the bigger picture) the difference between an average porter and a specialized professional.
Will it make a big difference? NO
But that is the trick where attention to details makes a difference here and there and eventually (looking at the bigger picture) the difference between an average porter and a specialized professional.
05-22-2012, 11:50 PM
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I would seriously think about telling the shop that you changed your mind and don't want them ported at all. They obviously aren't that familar with LS heads . It could be a big mistake to move forward!!! You are much better off saving up for some CNC work from a reliable shop that knows LS stuff.
05-23-2012, 12:16 AM
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yes i wish i could but he started them already 
...
... I would seriously think about telling the shop that you changed your mind and don't want them ported at all. They obviously aren't that familar with LS heads . It could be a big mistake to move forward!!! You are much better off saving up for some CNC work from a reliable shop that knows LS stuff.
05-23-2012, 12:16 AM
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