Chevy 630 HP Small-Block Engine - Rockin'- Step By Step - CHP

[Ed Blown Vert]

Chevy 630 HP Small-Block Engine - Rockin'- Step By Step - CHP
Form follows function. Or is it function follows form? When searching for upwards of 630 hp from a small-block Chevy, it really doesn't matter what follows what-who cares as long is it works? What is it about shaft-mount rocker-arm systems that strikes enthusiasts as being such elusive, exotic pieces? It may have been that way at one point, but with the surreal number of big-power engines roaming the streets, it's just another component to ensure reliable performance.
Jesel's shaft-mount rocker arms, for example, allow for maximum lift and duration from your camshaft. Standard rockers tend not to remain square at the tip of the valve, which can lose duration and lift, which can cost your engine horsepower, and nobody wants that. Also, the Jesel system keeps rocker-arm flex, if any, to a minimum, and its vast array of options (styles, weights, adjusters, and profiles), allows you to custom-tailor shaft mounts for your application.
The biggest advantage of shaft rockers is that they remove the extraordinary friction in a stock valvetrain caused by the short-pivot rocker geometry. A longer-pivot rocker arm reduces the scrub on the valve tip. However, with traditional stud rockers there isn't a way to increase the pivot length.
This month, Mike Consolo from Quarter Mile Performance showed us the dos and don'ts of installing such a system. He says you should step up to a shaft-mount system "when excessive lift is involved or an aggressive camshaft is utilized, including any time you exceed 0.700 lift or when using aggressive cam profiles with durations in the neighborhood of 270 and larger."
If you aren't sure of what you need for your build, don't worry; Jesel's tech line will answer any questions and set you up with the proper system for your application.
Do It Right
* When adjusting the intake side, your exhaust should be approximately halfway open at its 90-degree mark, as it's on its way down.

* When adjusting your exhaust side; the intake should be halfway closing at your 90-degree point, as it's on its way up.

Photo Gallery: Chevy 630 HP Small-Block Engine - Rockin'- Step By Step - CHP - Chevy High Performance Magazine



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[blue02Z]

nice Ed