My home inspection of Speedmaster heads

rumblefish360 said

The B3 kit? Here’s the thing. If your on here and you don’t use it you get brow beat to death. You get the “Your an idiot” “Your leaving power in the table” “Your geometry is wrong” “Your stuff is gonna bend brake warp or just simply **** a cheeseburger out a valve” & etc.... it’ll never end until you get beat up enough to get a B3 kit.
Do you NEED the kit? No
Would it help the engine to have the kit? Yes
What if you change cams? You probably need a new B3 set up. Add that to the probable cost of new pushrods.

Click to expand...

Not quite true.

If your rockers are hitting the springs and the springs aren't 1.625 or bigger, the geometry is wrong.

The correct fix is use the B3 Kit, mill off the stands and use offset shafts and stands (way more expensive than the B3 Kit to do the exact same thing). Or, you can use a grinder or a fly cutter and make the spring pocket in the rocker bigger.

The last option should never be done.

So that's what you get. I can tell you there are many engines out there running with junk geometry. Doesn't make it right.