noisy sbc

[565bbchevy]

To the above post the natural design of the cam walks it forward in the block, that is why when you install a roller and do not want the movement you put a bearing behind the cam gear because the button will make it contact the block and it is not designed to do that. Not to bust the original posters balls but after seeing all this I say using a Torrington bearing behind the gear with a button under the cam plate and the bolt under the water pump to hold the stamped cover for the proper end play is still the better method. Sometimes trying to reinvent the wheel isn't necessary.

If a cam naturally wants to walk forward in a block then why no cam retaining plates on flat tappet blocks?

He is only talking about roller cams, flat tappet cams are designed with a slight taper on the cam lobes that pushes the cam to the rear of the block which also rotates
the lifters in their bore for even wear.

 

[Fox80]

To the above post the natural design of the cam walks it forward in the block, that is why when you install a roller and do not want the movement you put a bearing behind the cam gear because the button will make it contact the block and it is not designed to do that. Not to bust the original posters balls but after seeing all this I say using a Torrington bearing behind the gear with a button under the cam plate and the bolt under the water pump to hold the stamped cover for the proper end play is still the better method. Sometimes trying to reinvent the wheel isn't necessary.

If a cam naturally wants to walk forward in a block then why no cam retaining plates on flat tappet blocks?

He is only talking about roller cams, flat tappet cams are designed with a slight taper on the cam lobes that pushes the cam to the rear of the block which also rotates
the lifters in their bore for even wear.

Thank you, yes sorry I was talking about this posters motor, 565 is correct the taper on the lobes of a friction cam actually has to spin the lifters or you will wear a hole in the lifter, on circle track motors with solid cams I still ran a Torrington bearing and button because the walking if the cam causes timing bounce on a locked down dist. and at 8,500 rpms 39 degrees timing is good 40 donates pistons to the scrap pile