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Cris · 11-08-2017, 07:27 PM

Irish:

Google would be your friend on this topic because there are lots of trade-offs when going from hydraulic to solid roller lifters. In a nutshell, for the ultimate in performance, the solid roller is the best choice. Especially on a motor that makes it power north of 6000 RPM. The downsides of the solid roller are one, you have to set lash routinely. And second, they are relatively fragile compared to a hydraulic lifter.

Solid rollers are not damaged by friction, but by the hammering they take driving the valve open. Most solid rollers use needle bearings, and these will fail after several thousand street miles. The solid roller manufacturers have been improving this by using oil fed directly to the needle bearings and by replacing the needle bearings with bushings. Today you will find people that have run solid rollers on the street for 10's of thousands of miles, but this still ain't even close to the 100's of thousands of miles a hydraulic roller will last.

Unless you have a competition engine, hydraulic rollers would be the best choice. Search around and you will find high performance hydraulic roller lifters that still work well up to 6500 RPM.

11-08-2017, 07:27 PM	#4
Cris Registered User Join Date: Aug 2016 Location: Los Altos Hills, California Posts: 170	Re: Roller lifters LOL Irish: Google would be your friend on this topic because there are lots of trade-offs when going from hydraulic to solid roller lifters. In a nutshell, for the ultimate in performance, the solid roller is the best choice. Especially on a motor that makes it power north of 6000 RPM. The downsides of the solid roller are one, you have to set lash routinely. And second, they are relatively fragile compared to a hydraulic lifter. Solid rollers are not damaged by friction, but by the hammering they take driving the valve open. Most solid rollers use needle bearings, and these will fail after several thousand street miles. The solid roller manufacturers have been improving this by using oil fed directly to the needle bearings and by replacing the needle bearings with bushings. Today you will find people that have run solid rollers on the street for 10's of thousands of miles, but this still ain't even close to the 100's of thousands of miles a hydraulic roller will last. Unless you have a competition engine, hydraulic rollers would be the best choice. Search around and you will find high performance hydraulic roller lifters that still work well up to 6500 RPM.