Jan 4, 2026 · Detailed guide on determining precise pushrod length to establish correct valvetrain geometry, optimize rocker arm wipe, and ensure engine longevity.

We’ve created this pushrod length calculator for engine builders and automotive enthusiasts to help measure the optimal size of pushrods. Pushrods transmit motion from the camshaft to the rocker …

Incorrect pushrod length puts unwanted stress on the valvetrain and leaves power on the table. Here's how to correctly measure pushrod length to optimize your engine.

Jul 31, 2024 · There are various factors that determine what your pushrod length needs to be. Block deck height, cam location, cylinder head deck thickness, rocker height, and valve length are but …

Feb 26, 2025 · How to Measure Preload and Determine Pushrod Length: Adjust the lifter to the base circle of the cam for the valve you want to measure (see below) Using a pushrod that you know the …

Oct 11, 2024 · This article presents a theoretical framework for calculating the ideal pushrod length based on geometric and kinematic considerations. The proposed method takes into account the …

The rate of the radius will affect the overall actual length of the pushrod. The reason for choosing this measuring standard is that some manufactures have larger or smaller holes with different chamfers, …

Oct 2, 2024 · Calculating the correct pushrod length is crucial for maintaining proper valve timing and ensuring efficient engine operation. Pushrods that are too long or too short can cause incorrect valve …

Changing the height of the cylinder head changes height of the rocker arm relative to the cam, and therefore it needs to be factored into the needed pushrod length. In particular, it's very common to …

Apr 29, 2022 · The goal of proper pushrod length is to center the rocker arm over the valve stem. As the rocker travels in an arched motion, it will be slightly outward on the valve face at the maximum lift …