Why Roller Rockers....
Seasoned HDF Member
Joined: Nov 2006
Posts: 5,889
Likes: 1,903
From: East Coast, USA
Then you see and feel my point, there is not very much resistance there.
This pretty much proves what I have been trying to explain.
When they are worn out, they shock the crank more than if they were not there at all.!
Simple kinetics really, as this truly shows what a whimpy snuber this comp thing is.
As I have said Many times B4,- if this thing is all that stands between a broken crank or not HD truly sucks.
To date, no one anywhere has ever proven a comp deletion is what broke their crank.
You all carry do what you like.
This pretty much proves what I have been trying to explain.
When they are worn out, they shock the crank more than if they were not there at all.!
Simple kinetics really, as this truly shows what a whimpy snuber this comp thing is.
As I have said Many times B4,- if this thing is all that stands between a broken crank or not HD truly sucks.
To date, no one anywhere has ever proven a comp deletion is what broke their crank.
You all carry do what you like.
Thread Starter
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,093
Likes: 7,622
From: Poolville
Thanks. It's all about the inner rocker cover and how the Moco used the same inner rocker cover but different rockers to try and correct the difference in the geometry of the entire assembly.. basically keeping production costs down by using one over rocker cover to do both front and rear cylinders... The geometry isn't perfect but does work for a stock build but obviously will not work in a performance build and for this reason as well as others, is why I believe it's recommended to use the roller rocker to help reduce the stress on the entire system.....
Club Member
Joined: Apr 2011
Posts: 5,803
Likes: 7,830
From: SE Louisiana
I'm not sure it's a geometry issue, even if it's off, it still shouldn't wear like that in a relatively short time, are the stems chamfered and no sharp edges?
FSM says stem protrusion max of 2.034 for stock, see if it's in the ballpark,
I'm still leaning on lube or harness issue.
FSM says stem protrusion max of 2.034 for stock, see if it's in the ballpark,
I'm still leaning on lube or harness issue.
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
Pushrods in an HD will not change the geometry.
It is that simple folks.
To change the geometry the fulcrum axis will have to be moved, (a lot of rework)
or, the rocker tip adjusted. Which is what most race shops will do.
If you have a big lump stick then the real-estate on top of the valve starts to get more important.
The roller running of the valve stem or favoring just one side is not a great idea under HIGH Spring pressure and fast RPM.
It is that simple folks.
To change the geometry the fulcrum axis will have to be moved, (a lot of rework)
or, the rocker tip adjusted. Which is what most race shops will do.
If you have a big lump stick then the real-estate on top of the valve starts to get more important.
The roller running of the valve stem or favoring just one side is not a great idea under HIGH Spring pressure and fast RPM.
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Thread Starter
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,093
Likes: 7,622
From: Poolville
You shouldn't gang up on someone you know nothing about...
Last edited by 98hotrodfatboy; Feb 21, 2019 at 06:44 PM.
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
Who is ganging up?
Inquiring minds ask for the answer.
Enough of the tease.
The person in question blatantly said several times rocker geometry can be changed by pushrod length on an HD. (johnjziz)
Not only did he say it, but they also said it with attitude and no explanation of how so.
For no reason.
Again what's the point just to jump in with absolutely no explanation?
Only to brag about a race winner somewhere as their authority and again no explanation only the insults.
My mind wants to know.
Insofar all I have received is insults for asking.
Inquiring minds ask for the answer.
Enough of the tease.
The person in question blatantly said several times rocker geometry can be changed by pushrod length on an HD. (johnjziz)
Not only did he say it, but they also said it with attitude and no explanation of how so.
For no reason.
Again what's the point just to jump in with absolutely no explanation?
Only to brag about a race winner somewhere as their authority and again no explanation only the insults.
My mind wants to know.
Insofar all I have received is insults for asking.
Last edited by Kingglide549; Feb 22, 2019 at 04:29 AM.