| 21. | The intake valves are made from nickel-steel and the exhaust valves from stainless steel.
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| 22. | The heads were high-flow items with big ports, and used intake and exhaust valves.
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| 23. | Intake valves are titanium and of width, while exhaust valves are width of Inconel.
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| 24. | The injectors are cycled from the same camshaft responsible for opening the exhaust valves.
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| 25. | The hydrogen can misfire on hot parts like the exhaust valve and spark plugs.
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| 26. | The SB2's original 8-degree exhaust valve angle has been retained.
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| 27. | Is there any engine out there that keep the exhaust valve open continuously during deactivation?
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| 28. | The MCA-Jet system has a small third valve separate from the intake and exhaust valves.
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| 29. | The engines had overhead inlet and side exhaust valves.
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| 30. | It employs variable timing, which adjusts the exhaust valves depending on speed and load conditions.
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