joel's build

[Halon]

Good call.

You should be able to find a cheap spring upgrade if you are on a budget from crower or similar. Those cams don't appear to be that aggressive that you'd have to fork out for a dual spring or beehive setup. Just a cheap single spring upgrade should be plenty for those cams, and allow you to rev to 8k without worrying much about valve float / jumping. I ran crowers on my 1g with HKS 272's up to 8000rpm.