[xxtremez]

Is it neccesary to run a cam button for a solid roller set up? What are the benefits?

Thanks in advance.

 

[gn7]

Yes,
Flat tappet cam lobes are ground on a taper that force the cam back, and the timing sprocket limits it.
Roller cams are not. There is nothing to assure the cam doesn't fore and aft in the engine. Even the smallest amount is hell in the roller, plus any movement will change you spark timing. In extreme cases, the cam can be pushed into the timing cover.

Its not so much a benefit as a necessity.



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[xxtremez]

Thanks, what is the best way to determine what length I need. BBC 454 Comp Extreme Energy Cam.

 

[67weiman]

You have to mock it up and measure to determine the correct length.

 

[Richard Till]

What type timing cover are you planning to use?

 

[obnoxious001]

What type timing cover are you planning to use?

Good point,, you can use a Cloyes cover that has the thrust bumper built in.

 

[gn7]

Good point,, you can use a Cloyes cover that has the thrust bumper built in.

And takes the measuring out it as well. Probably the easiest way for somebody that is all that familiar with setting up camshaft end play.
Its additional 145.00. But if you only have a stock stamped T cover, you probably should be thinking about a stronger cover anyway.



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[xxtremez]

Right now has a stock style transdapt cover. I have to change it anyway because a roller timing chain will not clear it. If I go with the Cloyes the button is built in??? Long story, i bought a fresh built 427 and pulled all of the valve train out to put in my 454. This timing chain had a cam button in it, measured .730 seems a little short most I have seen for BBC are .945. I plan replacing the timing chain, cover, button and all. any recommendations are appreciated.

Thanks

 

[gn7]

Right now has a stock style transdapt cover. I have to change it anyway because a roller timing chain will not clear it. If I go with the Cloyes the button is built in??? Long story, i bought a fresh built 427 and pulled all of the valve train out to put in my 454. This timing chain had a cam button in it, measured .730 seems a little short most I have seen for BBC are .945. I plan replacing the timing chain, cover, button and all. any recommendations are appreciated.

Thanks

The button is part of the Cloyes 9-231 cover.

Who told you need a different cover to clear the roller chain? Is this a Gen 5 or 6 454???



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[xxtremez]

Gen 4, it says that on the product description, not sure why. The Cloyes sounds like a good deal.

Thanks for the input.

 

[obnoxious001]

Right now has a stock style transdapt cover. I have to change it anyway because a roller timing chain will not clear it. If I go with the Cloyes the button is built in??? Long story, i bought a fresh built 427 and pulled all of the valve train out to put in my 454. This timing chain had a cam button in it, measured .730 seems a little short most I have seen for BBC are .945. I plan replacing the timing chain, cover, button and all. any recommendations are appreciated.

Thanks

.945" would be with a stock type steel cover,, .730 may work with aluminum, mock it up and see. In some cases a SBC unit works with the aftermarket aluminum covers. Comp and other companies make a composite plastic one that is pretty easy to shave down to get the clearance you want, but also easy to get past your goal and have too much thrust.