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Old 12-21-2010, 05:43 PM
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roller cam upgrade

I have a flat tappet hyd cam fitted now, but what parts apart from cam, lifters, pushrods and springs will I need to upgrade to a hyd roller cam? (ie the parts that stop the cam moving forwards/backwards and will I need a different timing cover?)
The block is post 1987 SBC so machined for the retainer plate.
Part numbers would be helpful.
Also I am using Valvoline racing oil 20/50 at the moment - would another type of oil be any better with a roller cam?

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Old 12-21-2010, 08:36 PM
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Don't know about the oil, the part to limit cam movement is called a block protector. Summit part number SUM-G1790 and are 12 bucks

there's also a cam button pn sum-g001 and are 3 to 7 bucks each.

Timing cover needs to be stronger to limit cam walk. They make em with the button in em but they're expensire such as pn clo-9-221
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Old 12-21-2010, 09:51 PM
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Quote:
Originally Posted by dutch paul
I have a flat tappet hyd cam fitted now, but what parts apart from cam, lifters, pushrods and springs will I need to upgrade to a hyd roller cam? (ie the parts that stop the cam moving forwards/backwards and will I need a different timing cover?)
The block is post 1987 SBC so machined for the retainer plate.
Part numbers would be helpful.
Also I am using Valvoline racing oil 20/50 at the moment - would another type of oil be any better with a roller cam?
The block should have the cast bosses for the camshaft retainer plate behind the timing gear, might need to be drulled and tapped. You'll need the plate and the timing chain/gears compatable with the roller cam and retainer plate. With this set-up you won't need a cam button or aftermarket timing cover. If not using a factory cam retainer you will need a cam button and strong cover to prevent cam movement forward in the block.

You will need the lifter spider reatainer and the lifter dogbones if using factory style roller lifters. You could use retro-fit link bar roller lifters and not need the factory dogbones and retainer spider of you don't want to use factory parts.

Oil weight won't matter, you can keep using 20W50 if you like.
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Old 12-22-2010, 12:58 AM
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Thanks for the replies.
Due to the distributor gear/oil pump drive, will the cam want to "walk" forwards or backwards in the block?
Re engine oil - the Valvoline Racing oil is a mineral oil containing old fashioned zinc for flat tappet cams. Will I still need to keep using mineral oil with the roller cam?
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Old 12-22-2010, 10:10 AM
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Don't forget to change the distributor gear.
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