Roller Cam
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Senior User
Joined: Oct 2003
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Roller Cam
Ive decieded to run the Crane 349521 in the 390 im builded, but the guy down the street said I have to have special machining done to the block to run a roller cam. I told him i think his wrong but just want to make sure before I start.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
that is a hydraulic roller. No machining required to a block running a hydraulic cam.
You will need the Hydrauilc roller lifters and custom pushrods. I'm running that cam, I suggest you consider some slightly stiffer springs than those reccomended by Crane. I had Valve float issues with mine below 5000rpm.
You will need the Hydrauilc roller lifters and custom pushrods. I'm running that cam, I suggest you consider some slightly stiffer springs than those reccomended by Crane. I had Valve float issues with mine below 5000rpm.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
A local shop replaced mine when they experienced valve float on the dyno. I think they went too far. I'll dig up my part number, but I know they are about 430lbs at open. about 100lbs above the Crane reccomended value..
