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Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Tue Oct 08, 2019 12:54 pm
by BradH
On another forum there was a discussion on using offset rocker arms with standard (centered) vs offset-pushrod-seat roller lifters.
Someone asked if the side load on the lifter is worse if the pushrod seat is centered w/ a more angled pushrod or when the pushrod seat is offset w/ a less angled pushrod.
My simplistic perspective is the lifter's going to get side-loaded regardless, but don't know the physics behind the question to understand which is the more problematic config. Thanks - Brad
Re: Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Tue Oct 08, 2019 2:18 pm
by Stan Weiss
Maybe Mike has a simplistic answer I have never found one.
Stan
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Re: Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Tue Oct 08, 2019 2:27 pm
by BobbyB
BradH wrote: ↑Tue Oct 08, 2019 12:54 pm
On another forum there was a discussion on using offset rocker arms with standard (centered) vs offset-pushrod-seat roller lifters.
Someone asked if the side load on the lifter is worse if the pushrod seat is centered w/ a more angled pushrod or when the pushrod seat is offset w/ a less angled pushrod.
My simplistic perspective is the lifter's going to get side-loaded regardless, but don't know the physics behind the question to understand which is the more problematic config. Thanks - Brad
More pushrod angle will cause more lifter sideload. However, this does not mean the lifter can't handle the sideload. I don't think you can necessarily say either way is better than the other.
Re: Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Tue Oct 08, 2019 3:40 pm
by Walter R. Malik
A roller lifter with an offset pushrod button will exhibit less side load but, a certain amount of twisting force will be introduced.
Re: Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Tue Oct 08, 2019 3:49 pm
by CamKing
An offset pushrod seat is better for the pushrod.
A centered pushrod set is better for the lifter.
Re: Roller lifter side load: pushrod angle vs offset pushrod seat
Posted: Wed Oct 09, 2019 8:43 am
by BradH
Good replies; thanks - Brad