polishing is it a wast of time?????
03-04-2010, 06:05 PM
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polishing is it a wast of time????? Ok i didnt know where to put this but if i need to move it just let me know me and a friend are doing head and cam on are cars we both have 243 gto heads but i got a ms4 cam kit and he has a smaller one he is just polishing his head and i said i didnt want to mess around with it shoul i do it or not whats the pros of just polishing the heads
03-04-2010, 06:35 PM
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03-04-2010, 08:51 PM
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o and hes just doing it by hand and hes never done any polishing on heads im sure he cant hurt them by polishing them but is it a waste of ime for me to try and do mine
03-04-2010, 11:38 PM
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i would polish the exhaust runners and especially the combustion chamber
my 317 castings where pretty nasty in the combustion chambers. those little casting drops will create hot spots and ignite fuel at a certain level
before
after
my 317 castings where pretty nasty in the combustion chambers. those little casting drops will create hot spots and ignite fuel at a certain level
before
after
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03-05-2010, 10:30 AM
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1) porting a head is good, if done correctly.. i.e. if your not a pro i wouldnt recomend it.
2) polishing is bad. the air needs a rough surface to move over, if its been polished the friction is actually higher and slows down the air flow.
look at your fast boats, you dont polish or wax the contact patch, you sand it, it creats an air cushion between the boat and the water...
2) polishing is bad. the air needs a rough surface to move over, if its been polished the friction is actually higher and slows down the air flow.
look at your fast boats, you dont polish or wax the contact patch, you sand it, it creats an air cushion between the boat and the water...
03-05-2010, 07:59 PM
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1) porting a head is good, if done correctly.. i.e. if your not a pro i wouldnt recomend it.
2) polishing is bad. the air needs a rough surface to move over, if its been polished the friction is actually higher and slows down the air flow.
look at your fast boats, you dont polish or wax the contact patch, you sand it, it creats an air cushion between the boat and the water...
2) polishing is bad. the air needs a rough surface to move over, if its been polished the friction is actually higher and slows down the air flow.
look at your fast boats, you dont polish or wax the contact patch, you sand it, it creats an air cushion between the boat and the water...
you only polish the exhaust runners, smother surface will move more air, and will have less carbon build up
the reason why nobody polishes the intake runners is becasue the fuel needs to atomize.
usually you remove all the casting marks on the intake runners and go over with sandpaper
