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Hamilton Cams HD Pushrods for 5.9L Cummins
If you are running heavy springs, high RPM’s, high
boost, a high lift and duration cam or throwing a shot of nitrous at your Cummins, don’t overlook your pushrods. The pushrod is a very important and often overlooked component in any high horsepower build. It doesn't have
to do a much, just transmit lift from the lifter to the rocker arm, and bend or deflect as little as possible. Reducing mass in an engine is almost always a good thing however there are a few places, in order to work
correctly under high stress, that require a super rigid part. The problem is that more rigidity almost always means more mass.
In these applications that require a super rigid part, pushrods, rods, wrist pins etc., to reduce mass would be to get a part
that either doesn't live long, or a part that reduces performance. This is where pushrods fall. There are ways to get a strong
part with better design and better materials without gaining mass in some instances. But that mindset
too often means one-off designs and exotic materials, and that means a lot of money. In the pushrod world there is a small
group of materials that work best for the given mass. Mainly performance pushrods are made from a form of chromoly. Ours are
no different being made of 4130 chromoly with hardened 8620 pressed in ends. We hear some concern about pushrods and weight,
but I can assure you the negatives of additional mass are more than out weighed by the benefits of having the valve open at
the correct time, having the valve stay open longer and the additional lift gained from no deflection (bending). The pushrods in street driven Cummins are just a fraction of the weight of NASCAR pushrods that spin more
that double the rpm's of a Cummins. NASCAR teams spend millions on engine design and research supports a more rigid design
with more mass. Hamilton pushrods are manufactured by the same company that builds for many of the top teams internationally
in all forms of racing. We have spent many hours designing and comparing with every "performance" diesel pushrod
on the market.
Item #DD-HAM-9407-HDP
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