In December of 2019, I gave an educational seminar to a standing room only crowd at the Performance Racing Industry Tradeshow. I was asked to speak on the topic of valvetrain performance specific to offshore powerboats, and this was likely the first time this topic had been discussed publicly ever! The Camfather himself, Ed Iskenderian Read more about Frequency: Setting and Hitting Your Targets: Part 3[…]
Sometimes things don’t go right out on the water. Sometimes you have to limp home on one engine or worse, call the tow boat. This happened to one unlucky fellow powerboater far offshore. That’s right: lifter failure. After an embarrassing day with a hot (the wrong kind of hot) and sunburnt wife, this guy turned Read more about Post-Mortem Parts Analysis: A Look at a Failed Roller Lifter[…]
In December of 2019, I gave an educational seminar to a standing room only crowd at the Performance Racing Industry Tradeshow. I was asked to speak on the topic of valvetrain performance specific to offshore powerboats, and this was likely the first time this topic had been discussed publicly ever! The Camfather himself, Ed Iskenderian Read more about Frequency: Setting and Hitting Your Targets: Part 2[…]
Allmond Marine gives Seminar at 2019 PRI Show In December of 2019, I was honored to present to a standing room only crowd at the Performance Racing Industry Tradeshow. I was asked to speak on the topic of valvetrain performance specific to offshore powerboats, and this was likely the first time this topic had been Read more about Frequency: Setting and Hitting Your Targets: Part 1[…]
If you’ll be at PRI next week, I invite you to join us for a great discussion series on cams and valvetrain. Noted Technical Writer and Author David Vizard (https://www.facebook.com/DavidVizardAuto/) will discuss his method of choosing cams to complement your engine (automotive focus) My talk will be on the importance valvetrain frequency plays in your Read more about Allmond Marine to Lecture on Valvetrain at the 2019 PRI Show[…]
TLDR Summary: 5 million cycles isn’t anything to be proud of if you’re into offshore. For the 2019 Performance Racing Industry Tradeshow, Competition Cams purchased an ad on the back cover of the PRI magazine. It showed their new bushed roller lifter, proudly highlighting that they have tested it for 5 million cycles. Sounds good, Read more about 5 Million Cycles? You Might Hit that in the No-Wake Zone[…]
What’s in a logo? In the case of Allmond Marine, it’s more than you might think. At first glance, it is reminiscent of a rotating surfacing propeller as it throws water off of it. But look a little closer: it’s made of sixteen sharp shards. There’s meaning in the number sixteen: It’s of course eight multiplied Read more about About our Logo: The “Ring of Sixteen”[…]
In the last installment we reviewed the two basic types of steel used in valves: martensitic and austenitic. In many offshore powerboats, especially for you guys with forced induction, exhaust gas temperatures get too high for 21-4N material. A good transition point to start looking at superalloy exhaust valves (with good fuel and spark calibration) Read more about Valves – In the Flow: Part II[…]
Martensitic vs. Austenitic steel In the world of engine valves, they are made of one of two types of steel: martensitic and austenitic. Martensitic steels are predominantly martensite, and feature a grain structure that resembles a collection of needles. Martensitic steels harden well and tend to be brittle before they are tempered. Once tempered, they Read more about Valves – In the Flow: Part I[…]
So where do recommendations for springs that have over 200lb on the seat come from? To understand that, you must first appreciate that a valvespring has two jobs: first it has to provide enough force to hold the valvetrain together. Second, it has to control its own mass. In high speed operation, valve springs vibrate. Read more about Valvesprings: Use the Force – Part II[…]
