I was just wondering if anyone could tell me the difference between hydraulic and solid cams I have a 87 formula 350 so I think it has a hydraulic cam but im not positive. Im not planing on changing it anytime soon I would just like to know. Thanks

 

http://www.stangtv.com/tech-stories/...raulic-roller/

That explains everything you need to know. What they didn't show was that solid rollers make much more power in higher RPMs than they tested, so the test was skewed in that regard. For a street car I would argue that the money is better spent elsewhere. Your car will not have a solid in it unless someone else before you installed one. In most street and strip cars, I would recommend a hydraulic roller. They're cheap compared to their solid counterparts and can still make excellent power for most builds out there. I personally use a solid flat tappet, and they're great cams provided you are willing to do the extra work to ensure they stay operating properly.

 

thank you for the info that helps alot