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SVT Shelby GT500
Stainless steel valves or leave stock?
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<blockquote data-quote="blackshelby" data-source="post: 12208341" data-attributes="member: 83686"><p>Don't waste your money on new valves nothing out there that is any better flowing then the stock ones....... The stock one's are plenty strong too, especially what you are looking to do.</p><p></p><p>Spent hours and hours on the flow bench, flowing almost every valve out there, compared to the stock valves. </p><p>Flowed them on crazy ported heads, mild ported heads, on stock heads etc (up to .550 lift) You wouldn't want a cam with more than .500 lift anyway in these motors.</p><p>In fact most aftermarket exhaust valves flowed less then the stock one's.</p><p>Ford has a real nice tulip shape on the exhaust valve that works great.(they did their homework on that valve)</p><p>The only way you will get a better flowing valve is to play with clay on the valves and then send them out for a custom set which is mega bucks.</p><p></p><p>Do not go to an over-sized valve either.</p><p>The only way to even see a potential from an oversize valve in these heads would be with a larger bore(like a 5.8 bore) You will kill flow going to a larger valve on the 5.4 bore.</p></blockquote><p></p>
[QUOTE="blackshelby, post: 12208341, member: 83686"] Don't waste your money on new valves nothing out there that is any better flowing then the stock ones....... The stock one's are plenty strong too, especially what you are looking to do. Spent hours and hours on the flow bench, flowing almost every valve out there, compared to the stock valves. Flowed them on crazy ported heads, mild ported heads, on stock heads etc (up to .550 lift) You wouldn't want a cam with more than .500 lift anyway in these motors. In fact most aftermarket exhaust valves flowed less then the stock one's. Ford has a real nice tulip shape on the exhaust valve that works great.(they did their homework on that valve) The only way you will get a better flowing valve is to play with clay on the valves and then send them out for a custom set which is mega bucks. Do not go to an over-sized valve either. The only way to even see a potential from an oversize valve in these heads would be with a larger bore(like a 5.8 bore) You will kill flow going to a larger valve on the 5.4 bore. [/QUOTE]
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SVT Shelby GT500
Stainless steel valves or leave stock?
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