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Old 07-27-2018, 04:33 AM   #2
EFoss28
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Join Date: Jul 2018
Location: FW, TX
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Most people do not swap the valve springs when doing the cam swap. I think it is a good idea to swap as the S52 spring is a little stiffer, but also a little bit shorter. You could be more prone to valve interference if you miss a shift or over-rev if you use the M52 springs. All of my experience is from a M52 race car that I rent to customers and I have a lot of experience with bent valves from them over revving the engine. I might suggest this kit as your best option if you decide to buy springs (I use it on my current race engine and have no issues). https://thmotorsports.com/538202-sup...-retainer-kits
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