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Re: ? on head porting Posted by John Williams [Email] (#1982) [Profile/Gallery] (more from John Williams) on Mon, 11 Dec 2006 19:46:25 In Reply to: ? on head porting, Smeter, Mon, 11 Dec 2006 14:12:30 Members do not see ads below this line. - Help Keep This Site Online - Signup |
You can use a micrometer or calipers to measure each opening to try and make them exactly the same. It helps a lot just to port match the exhaust side especially and polish to a mirror finish, the intake side should remain slightly ruff to help atomization. Just getting into the bowls and smoothing out all the sharp edges from the casting process and blending them into the ports seems to help too. I put in some time on a t5 head and thats what I did, port match, open and polish the exaust side, port match intake side and light smoothing only, kept same intake port shape. Then the big job, the 16 bowls, that is what is time consuming, but where a lot of the gains come from, I opened them up some and smoothed and flowed them into the ports. It really seemed to help the transition from no boost to boost and the boost seems to come on very smooth... Good Luck, John
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