Valve spring question for 280 HKS
#5
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Many people are running them on stock springs/retainers, including myself. They're pretty mild compared to other 280s, same lift as HKS 272s with alot less ramp rate than other big cams. Even some larger cams like the FP4Rs are ok on stock springs up to 8k.
Last edited by Steve93Talon; Feb 1, 2009 at 10:31 AM.
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#13
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factory springs are quite amazing. they test just like new ones do even with 100,000 miles on them. you dont need springs with HKS 280 cams. the profile is easier to follow than a stock cam. stock springs can rev to 9000 on stock cams so you can expect the same on the 280 cams.