Push Rods
06-13-2014, 05:56 PM
#2
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Location: Lagrange ky
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Big money. But titanium valve trains are where its at. Lighter and stiffer. Everything you want in your valve train.
Edit: but the rpm in a boat its not worth the price. I really wouldnt say its worth it until closer to 8000 rpm.
Edit: but the rpm in a boat its not worth the price. I really wouldnt say its worth it until closer to 8000 rpm.
Last edited by beaver 3; 06-13-2014 at 08:34 PM.
06-18-2014, 02:37 PM
#3
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Titanium = not worth it. No benefit here. The stiffness (as measured by elastic modulus) is between steel and aluminum, as is the weight. What you would ideally want is something with a higher specific modulus, which is the ratio of modulus to density. Aluminum metal matrix composite has been tested by NASCAR teams before, and shows promise, but that's even more expensive than Ti.
Recommendation: stick to steel pushrods with as large an OD as possible, and focus on reducing the weight of your valvetrain on the valve side of the rocker arm. My first stop would be beehive springs. They should be good up to 6500 RPM in most cases, if spec'ed correctly.
Recommendation: stick to steel pushrods with as large an OD as possible, and focus on reducing the weight of your valvetrain on the valve side of the rocker arm. My first stop would be beehive springs. They should be good up to 6500 RPM in most cases, if spec'ed correctly.
06-20-2014, 04:18 PM
#4
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06-21-2014, 05:15 AM
#6
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In recent years the emphasis has become valvetrain stiffness as apposed to thinner and lighter components.
Light is obviously better but not when valvetrain stability is sacrificed.
Steel rocker arms and heavy wall pushrods will make more power than thin wall pushrods and aluminum arms due to stability.
As has already been stated, titanium is great for all out racing where strict maintanence intervals are observed and where every last advantage is needed, regardless of cost.
Light is obviously better but not when valvetrain stability is sacrificed.
Steel rocker arms and heavy wall pushrods will make more power than thin wall pushrods and aluminum arms due to stability.
As has already been stated, titanium is great for all out racing where strict maintanence intervals are observed and where every last advantage is needed, regardless of cost.
06-21-2014, 11:27 AM
#7
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In recent years the emphasis has become valvetrain stiffness as apposed to thinner and lighter components.
Light is obviously better but not when valvetrain stability is sacrificed.
Steel rocker arms and heavy wall pushrods will make more power than thin wall pushrods and aluminum arms due to stability.
As has already been stated, titanium is great for all out racing where strict maintanence intervals are observed and where every last advantage is needed, regardless of cost.
Light is obviously better but not when valvetrain stability is sacrificed.
Steel rocker arms and heavy wall pushrods will make more power than thin wall pushrods and aluminum arms due to stability.
As has already been stated, titanium is great for all out racing where strict maintanence intervals are observed and where every last advantage is needed, regardless of cost.
06-21-2014, 01:20 PM
#8
The steel rocker arms are advantageous from a durability standpoint.
Plenty of aluminum rocker arms fail. Never seen a broken crower steel rocker arm.
That said, anytime you take flex out of a valvetrain, you gain stability, reliability and power. Steel rocker arms help stabilize the valvetrain.
I'm not claiming you will see mega horsepower from a steel rocker arm.
Plenty of aluminum rocker arms fail. Never seen a broken crower steel rocker arm.
That said, anytime you take flex out of a valvetrain, you gain stability, reliability and power. Steel rocker arms help stabilize the valvetrain.
I'm not claiming you will see mega horsepower from a steel rocker arm.
