Rohnert Park Auto Repair

The camshaft is one of the most critical components to your vehicle’s engine performance. A camshaft functions as the controller of the opening and closing of the valves. This then controls the flow of air and fuel into and out of the engine, which determines engine performance, fuel economy, and emissions. This air and fuel control is made possible because as the shaft rotates, the lobes push the valves open in sync with the crankshaft gear. As the camshaft rotates, the cam lobes move up and down. The performance modification of an aftermarket camshaft stems from two forms of change. The first being altered valve lift. This typically refers to a higher lift on the lobe, which increases in length of the valve stroke, which then allows for more air to enter through the inlet valves, increasing the power potential of the engine. Another option is altered valve timing, which is where we modify precisely when the valves open and ... read more

Cylinder head porting is the process of modifying both the intake and exhaust ports of an internal combustion engine resulting in improvement of the quantity of air flow. This process can be applied to any engine! At RPM all our porting starts with a valve job in order to make sure all valve seats are cut correctly for optimum flow characteristics. When your engine has an easier time breathing, it can turn that into power. It does that by filling the cylinder more efficiently, therefore giving better volumetric efficiency. There are many benefits to cylinder head porting. The first benefit is that it causes increased airflow through the heads and into the combustion chamber. This alone creates more power because more air in equals more power out. In heads that have not been ported, incoming air passes up and over obstructions. This means less air gets through resulting in less power capabilities. Cylinder head port matching pro ... read more

Looking to increase your vehicle’s horsepower? RPM Engines and Machine is here to help! Our team of experts specializes in increasing your vehicle’s horsepower. There are various options for you that are customized to meet your needs and goals for your vehicle’s performance. In this blog, we will look at a few options. Installing Bigger Valves or Quick Exhaust Valves With appropriate space in the combustion chamber for bigger valves, installing bigger intake and exhaust valves may be a good fit for your vehicle in order to achieve the thrill you’re craving. This installation requires cylinder head porting in order to achieve maximized power of the newly installed valves. Another option is to install a quick exhaust valve on your pneumatic cylinder. The quick exhaust valve directs the air leaving the cylinder into the atmosphere, instead of flowing back through the directional valve. This valve reduces wasted energy, which saves ener ... read more