Titanium intake valves
10-21-2011, 01:23 AM
#2
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Location: Oshawa, Ontario, Canada
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I know a few guys with "serious" street cars that use them in blower motors, the only complaint I have heard is if the motor "Burps" or backfires you can tulip the valve face. I know quite a few people who run the stainless valves since they hold up to incredible amounts of cylinder pressure, however, they are considerably heavier than Titanium. I guess it depends how high you twist the motor. On the exhaust side inconel works well too.
10-21-2011, 03:04 PM
#3
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Below 6000 rpm, there's not a LOT of need for titanium intakes. Sure, less valvetrain mass is helpful, but titanium valves are less able to tolerate lean conditions, detonation, or pressure spikes.
Modern springs are easily able to control valve float in marine applications without a lot of drama. Using titanium retainers is a better place to save weight without having to worry about your valves sinking into the seats..
One of the popular modifications to increase the durability of the current four-stroke dirtbikes is to replace the titanium valves with stainless ones. Unless you are competitively racing, the Ti valves are a maintenance problem in many of those bikes.
MC
Modern springs are easily able to control valve float in marine applications without a lot of drama. Using titanium retainers is a better place to save weight without having to worry about your valves sinking into the seats..
One of the popular modifications to increase the durability of the current four-stroke dirtbikes is to replace the titanium valves with stainless ones. Unless you are competitively racing, the Ti valves are a maintenance problem in many of those bikes.
MC
