Rockers

Thursday, November 10, 2011
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The previous rockers article in RET-Monitor looked at the important matter of component stiffness; with the advent of the now widely used Spintron testing, engineers began to see the value of increased rocker stiffness when considering the ability of... read more
Tags :  valvetrain

Valve springs can't take Pro Stock revs

Thursday, November 10, 2011
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Larry Morgan is the only driver in NHRA Pro Stock professional racing to have campaigned a Ford Mustang throughout the 2011 Full Throttle Drag Racing Series season. Although he came close, he didn't make the play-off Countdown to One. He's developed... read more
Tags :  valvetrain

Empty heads?

Thursday, November 10, 2011
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There are few components in a race engine that, given a free hand in terms of design and development, we wouldn't choose to make a little lighter. However, there can also be few components in the engine where the effect of lightening is potentially m... read more
Tags :  valvetrain

Lifters

Thursday, September 22, 2011
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For those who have no interest in pushrod engines in racing, their criticism of categories such as NASCAR, and the engines used, revolves around a perceived lack of technology. The regulations for the Sprint Cup series in certain areas don't help dis... read more
Tags :  valvetrain

Heat transfer through valve seats

Thursday, September 22, 2011
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In designing a new race engine, or developing an existing one, the management of heat in poppet valves - and the transfer of heat from them - is only one small aspect, but it has an effect on performance and reliability. The subject of hollow poppet... read more
Tags :  valvetrain

Pushrod stiffness

Thursday, August 11, 2011
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The pushrod, or overhead valve (OHV), engine has a lot to recommend it in terms of packaging, although it achieves this at the expense of much valvetrain stiffness compared to an overhead cam (OHC) mechanism. One of the least stiff members in the pus... read more
Tags :  valvetrain

Double-spring valve springs for success

Thursday, August 11, 2011
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John Force Racing (JFR) is one of the most successful Funny Car teams in the history of the NHRA Full Throttle Drag Racing Series. Understanding that multiple team cars on the track results in successfully shared technology, JFR this year is competin... read more
Tags :  valvetrain

Rocker stands and shafts

Monday, July 04, 2011
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The pushrod valvetrain, while having great advantages for engine packaging, has the distinct disadvantage of not having a very direct connection between cam and valve, as is the case with overhead cam (OHC) engines. Even in the case where finger foll... read more
Tags :  valvetrain
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