- Jul 27, 2021
- Reaction score
- East Texas
- My Car
- 1971 Mustang Mach 1 M code 351 4 speed
Yes, you got the correct gear if you have a roller cam, steel is what you should be using. I am not too sure why the bronze gears came into use, instead of steel, but by the mid-80's when I was running a speed shop, they were what you sold with a roller cam. Back then, roller cams were used almost exclusively on full on race cars, and the bronze gear was a part that needed to be changed occasionally as it was considered a wear part. Steel being a harder material would slowly wear the softer bronze gear over time and you needed to check it, and when you saw some wear just replace it. The bronze gear was a sacrificial part. You never used a cast iron gear with a roller cam, it would eat up the gear in no time. At some point in the late 80's early 90's, with the advent of the 5.0 "roller cam" engine, you started seeing manufacturers offer steel gears for use with roller cams. The 5.0 "roller" engine had a steel roller cam and a steel gear in it, that basically lasted for the life of the engine. After that you started seeing cam manufacturers offering steel gears for their roller cams, I think that they took a tip from Ford on that, or maybe from Detroit as a whole as everyone started using roller cams in their V8 engines with steel gears in them. The other issue here is that some manufacturers back then stated making steel roller cams with a cast gear in them so that you could use a standard cast iron gear for street cars, no idea if that is even being made today.I am confused on this. I just updated to a roller cam and everything says I MUST use a steel gear. When are you supposed to use a bronze gear over a steel?. And as a follow on, I took a magnet to my gear to verify it is steel. Is that ok to use on a new cam?