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Alan Roehrich · 06-06-2009, 06:01 AM

I seriously doubt you'll see huge gains. A couple of HP, maybe. A well executed valvetrain on a Stock engine doesn't leave a whole lot of room. If you have the Holroyd stuff or something similar, and a good set of 7/16" 0.125" wall pushrods, you likely won't see any measurable gains with roller rockers. In fact, in going back to 7/16" studs from the Holroyd 9/16" stud, I'd be very concerned about breaking rocker studs. Read an old Chevy Power Manual and they warn you that roller rockers are notorious for breaking rocker studs. That's why stud girdles were invented.

06-06-2009, 06:01 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,115 Likes: 1,572 Liked 1,829 Times in 414 Posts	Re: Roller Rockers on Stocker Engine ? I seriously doubt you'll see huge gains. A couple of HP, maybe. A well executed valvetrain on a Stock engine doesn't leave a whole lot of room. If you have the Holroyd stuff or something similar, and a good set of 7/16" 0.125" wall pushrods, you likely won't see any measurable gains with roller rockers. In fact, in going back to 7/16" studs from the Holroyd 9/16" stud, I'd be very concerned about breaking rocker studs. Read an old Chevy Power Manual and they warn you that roller rockers are notorious for breaking rocker studs. That's why stud girdles were invented. __________________ Alan Roehrich 212A G/S