I have seen a lot of comparisons between the GSC S2 and the Kelford 272. I have decided that I will install a good cam but not as big as the S2 or the Kelford 272. BTW either the GSC S1 or the Kelford 264 is more aggressive than the HKS 272. They are closer to the HKS 280 from a spec point.

Anyone has experience or have tune these two cams? Which is better if any? Any comments or experiences with them?

 

No one is using those cams?

 

there is a big thread if you search for the kelfords about a guy who is running them. cosworth m1's would also be in the same ball park as these 2 cams.