Harley Twin Cam Engines

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Harley-Davidson twin cam oil pressure. E.R.T. Products

 Since 1990, we've specialized in increasing Harley oil pressure. This cures noisy lifters and gains horsepower! Improve performance and quiet your engine at the same time.  

Setting the Harley Twin Cam Pop Off Valve

Bench setting your Harley Twin Cam pop off valve with E.R.T. Products SP-TC Superpump Kit  is a great place to start when trying to improve your Harley Twin Cam oil pressure. When bench setting, you will find that the SP-TC oil pressure relief valve spring kit has a  very consistant spring rate between springs.  We also offer an engine builders spring kit that allows you to purchase 3 spring packs of just Blue, Yellow or Red that include 3 new split pins as well. Click below to e-mail us!

Engine Builder

Factors to Consider when Setting the Twin Cam Pop Off Valve

Again, pop off valve bench setting is a great place to start when trying to improve your Twin Cam oil pressure. But, you also have to consider the mileage and wear on your engines components. Rocker arm bushings play a critical role in maintaining proper oil pressure and are often overlooked in an engine rebuild. Since rocker arms swing in an arc and not completely around, make sure that they are not egg shaped and the specs between rocker shaft and bushing are correct.

O-Rings & Harley Twin Cam Engines

O-Rings play a huge role in sealing the oil pressure routes in a Twin Cam engine. A sliced or damaged o-ring can mean Twin Cam oil pressure problems. O-Rings seal the oil pump, camplate and don't forget, underneath the rocker arm support plate.

Setting the Harley Twin Cam Pop Off Valve

SP-TC for Twin Cams

Our SP-TC pressure relief valve spring kit will put your Twin Cam engine at correct factory Harley oil pressure. Includes new split pins.

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TC-EZ Installation Tool

Don't gouge your pressure relief bore in your camplate, use this tool!

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Complete Twin Cam Kits

Harley-Davidson Twin Cam oil pressure relief valve spring kit from E.R.T. Products.

Everything you need to increase your Twin Cam oil pressure, including gaskets.  

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Installing the SP-TC

For installation instructions and more info about E.R.T.'s Twin Cam oil pressure relief kits.

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