Roller rockers, set up right, just require very carefull checking becasue the bits you get, might not be what you thought you ordered. The mid lift rocker angle has to be 90 degrees to the pushrod, or what Yella Terra recommend You must check that the upper roller tip rubs the recommended part of the valve tip, not the middle third, but what Yella Terra recommendsĦ. these rockers are 1.73:1 bolt-on pedestal type(no machining required), that have adjustment at the push rod end. Two instances of this on Ford Six, RickSmoll and another person.ĥ. Yes i agree with tyre toaster, if you got the dosh, buy some yella terra roller rockers, part no.YT6015. get the wrongly matched rocker ball and cups, and grind the living daylights out of the rockers ball. Since pushrods varry so much, you have to be really sure the metal rod and the cups are compatableģ.Custom pushrods are best, but the ones you get can sometimes:-Ĥ. Offering over 500 individual performance parts from roller rockers, alloy cylinder heads, super chargers, to explosion proof flywheels, Yella Terra products put power and speed within your control. I was hoping to be able to use them with my current stud/tall adjuster nut/stud girdle set up but there's no way that will work without. Long recognized as the best available, Yella Terra race performance parts have been extremely successful in the motorsports world.
Just purchased a set of the Yella Terra Platinum series rockers and I noticed that the slot in the top is very small. The rule is that if you use a Yella Terra roller rocker, or those that Classic Inlines sell, you have to use the right rocker tube (there was a small and large diameter version) and the correct kind of Small Block Ford Windsor 302 non roller hydraulic edge oriface lifter, the right length oil through push rods after trail fitting using an adjustable pushrod, and the right diameter oil through rocker ball.ġ.I think the Aussie 250 reverses the stock US 200/250 rocker cup and push ball to another type.Ģ.The ball has to be the right diameter, measured with a micrometer, to suit the cups. Discussion Starter 1 (Edited) Only show this user. Same as my 1967 XR Falcon 200 engine.they came stock with them from 1960 to late 1967, even though they already had hydraulic lifters by then.