My home inspection of Speedmaster heads
I just picked my BB heads up today, and gave them a quick go-over. Whew! The intake valves are H-U-G-E, they almost look like coffee saucers! All the machined surfaces are flat, and the saddles for the rocker arms look true. There were no chips or metal flakes to be found in the ports or threaded holes. All the threads look good. Some initial photos, with more to come as I get into these things.
The inside of the ports could use a little massaging to radius some edges, but really the machining looks pretty good on the ports. Here's a typical spot where there's an edge you can feel easily, that even Dummy Me can smooth out with the die grinder.
The only thing that looks odd, and I will have to get some advice from those that know better, is the height of the valve stems is not the same. All the intakes are the same, and all the exhausts are the same, but the exhaust valves sit about .040" lower than the intakes. Here's a shot with a straight-edge resting on top of the intake valves, and here you can see the gap at the exhaust valve. More updates on these as I get into them in the next few days.
I just picked my BB heads up today, and gave them a quick go-over. Whew! The intake valves are H-U-G-E, they almost look like coffee saucers! All the machined surfaces are flat, and the saddles for the rocker arms look true. There were no chips or metal flakes to be found in the ports or threaded holes. All the threads look good. Some initial photos, with more to come as I get into these things.
The inside of the ports could use a little massaging to radius some edges, but really the machining looks pretty good on the ports. Here's a typical spot where there's an edge you can feel easily, that even Dummy Me can smooth out with the die grinder.
The only thing that looks odd, and I will have to get some advice from those that know better, is the height of the valve stems is not the same. All the intakes are the same, and all the exhausts are the same, but the exhaust valves sit about .040" lower than the intakes. Here's a shot with a straight-edge resting on top of the intake valves, and here you can see the gap at the exhaust valve. More updates on these as I get into them in the next few days.