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The BMW Range
7 Series
E38 728 I performance enhancement
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<blockquote data-quote="pussy" data-source="post: 450732" data-attributes="member: 60"><p>Seventeen Poison</p><p> </p><p>17th. If got chance to remove the head, do a port and polish job for the inlet, bigger inlet diameter and smoothen the exhaust port, not to much just a bit smooth, dun enlarge the exhaust port as you need the pressure to expel the gases.</p><p> </p><p>this will give smoother pick up and immediate throttle response.</p><p> </p><p>got more time do a decking on the valve, this increases the air intake volume and do a 3 angle valve seat, more air.</p></blockquote><p></p>
[QUOTE="pussy, post: 450732, member: 60"] Seventeen Poison 17th. If got chance to remove the head, do a port and polish job for the inlet, bigger inlet diameter and smoothen the exhaust port, not to much just a bit smooth, dun enlarge the exhaust port as you need the pressure to expel the gases. this will give smoother pick up and immediate throttle response. got more time do a decking on the valve, this increases the air intake volume and do a 3 angle valve seat, more air. [/QUOTE]
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E38 728 I performance enhancement
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