Hydraulic vs Solid Roller Cam
Racer
Joined: Sep 2004
Posts: 424
Likes: 2
Mech rollers were developed for racing and for years had failure problems on the street due to the lack of oiling to the cam and roller. The factory switched to hydraulic for longevity purposes, they wanted better then 100k reliability ( the spark plug change interval on my wifes car is 100k). The race rollers relied on splash for oiling, so extended highway driving, low speed operation, caused failures. The cam manufacturers are now providing Mech Rollers with oiling provisions. Why would a hydaulic roller last better then 100k, and a mechanical last only 20k ?? Only time will tell.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Originally Posted by jimmygmartin
Mech rollers were developed for racing and for years had failure problems on the street due to the lack of oiling to the cam and roller. The factory switched to hydraulic for longevity purposes, they wanted better then 100k reliability ( the spark plug change interval on my wifes car is 100k). The race rollers relied on splash for oiling, so extended highway driving, low speed operation, caused failures. The cam manufacturers are now providing Mech Rollers with oiling provisions. Why would a hydaulic roller last better then 100k, and a mechanical last only 20k ?? Only time will tell.
They use lower spring pressure and have less radical ramps than the race rollers and now they have made provisions for direct oiling of the rollers for those who can't remember not to let it idle too long without blipping the throttle.
Drifting
Joined: Aug 2002
Posts: 1,452
Likes: 190
From: Zion NC
I put solid rollers in mine. havn't run her yet, but you can see photos @ www.yellowvette79.com I can't wait...
