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SVT Shelby GT500
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<blockquote data-quote="JimIII@jdm" data-source="post: 15114939" data-attributes="member: 10902"><p>You have half the amount of work to do <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p></p><p>To do the 4 cams it could be done in a day 8-10 hrs if your hustling. However changing cams with out changing the springs is the last thing I would do to a GT500. The factory springs hold about 50lbs of seat pressure. You want to add a bigger cam with more lift and not expect valve float?! Most everyone who is putting cams in their shelby is already making big power with a big blower running big boost numbers. The factory springs will hold a good amount of boost pressure but when you increase the valve lift with your bigger cams with XX amount of boost pressure on the back of the valve your going to rob yourself of power and make your valve train pretty inefficient. Your going to cause the valves to start to want to float, blowing power out the exhaust and generating more heat in the intake. So the right way to do it is get a Higher seat pressure spring that will hold the valve and keep from float. It will help with the overall efficiency of the engine and internal heat, less chance of engine failure and more power!!! To change cams and springs your looking at more of a 20 hr job. It takes a lot more time to change all 32 springs and cams than just swaping 4 cams.</p></blockquote><p></p>
[QUOTE="JimIII@jdm, post: 15114939, member: 10902"] You have half the amount of work to do ;) To do the 4 cams it could be done in a day 8-10 hrs if your hustling. However changing cams with out changing the springs is the last thing I would do to a GT500. The factory springs hold about 50lbs of seat pressure. You want to add a bigger cam with more lift and not expect valve float?! Most everyone who is putting cams in their shelby is already making big power with a big blower running big boost numbers. The factory springs will hold a good amount of boost pressure but when you increase the valve lift with your bigger cams with XX amount of boost pressure on the back of the valve your going to rob yourself of power and make your valve train pretty inefficient. Your going to cause the valves to start to want to float, blowing power out the exhaust and generating more heat in the intake. So the right way to do it is get a Higher seat pressure spring that will hold the valve and keep from float. It will help with the overall efficiency of the engine and internal heat, less chance of engine failure and more power!!! To change cams and springs your looking at more of a 20 hr job. It takes a lot more time to change all 32 springs and cams than just swaping 4 cams. [/QUOTE]
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