13 replies to this topic

[mini-auto]

Not keen on the contact angle between my new forged rockers and valve stems, presume this will result in premature wear to both rockers and valve stems.

 

I'm thinking the contact face on the rocker should be square to the end of the valve stem?

 

Should I return these forged rockers?

 

The cylinder head originally had late type rockers, I'm thinking I should get some new late type.

 

What would you advise?

 

 

 

[nicklouse]

dont look good to me.

[Spider]

Hmm,,,, not good at all.

[Chris.Williams]

Where did you purchase those?
They look terrible.

[unburntfuelinthemorning]

Where were they from?  There are good ones out there, these were from Minispares about a year ago: 

[sledgehammer]

slightly off topic -

 

do them adjusters seem wound out a bit more than standard ?

 

are they new longer valves ?

 

(I can see the rocker faces are ground wrong)

 

just wondering

[GraemeC]

I don't think there are any pushrods in

[Chris.Williams]

Where were they from?  There are good ones out there, these were from Minispares about a year ago: 

Yes, these are the ones I have also.
No problem with them at all.

[Bobbins]

Slightly OT ... what are the benefits of forged rockers compared to standard or roller rockers?

[unburntfuelinthemorning]

Slightly OT ... what are the benefits of forged rockers compared to standard or roller rockers?

Standard rockers are supposed to give a 1.25:1 multiplication ratio but often fall short. 

 

Forged rockers give a 1.3:1 or 1.5:1 ratio (mine are 1.3:1) and are nice to look at. 

 

Roller rockers reduce wear on the valve stem tip but cost a lot and don't always fit  under certain rocker covers.

[nicklouse]

Slightly OT ... what are the benefits of forged rockers compared to standard or roller rockers?

Standard rockers are supposed to give a 1.25:1 multiplication ratio but often fall short. 
 
Forged rockers give a 1.3:1 or 1.5:1 ratio (mine are 1.3:1) and are nice to look at. 
 
Roller rockers reduce wear on the valve stem tip but cost a lot and don't always fit  under certain rocker covers.

Slightly incorrect info there.
Standard pressed are 1.27:1 standard forged 1.22:1 standard sintered 1.21:1

[unburntfuelinthemorning]

 

Standard rockers are supposed to give a 1.25:1 multiplication ratio but often fall short. 
 
Forged rockers give a 1.3:1 or 1.5:1 ratio (mine are 1.3:1) and are nice to look at. 
 
Roller rockers reduce wear on the valve stem tip but cost a lot and don't always fit  under certain rocker covers.

Slightly incorrect info there.
Standard pressed are 1.27:1 standard forged 1.22:1 standard sintered 1.21:1

 

Fair enough.  I should have said that the forged rockers which Minispares supply (which are not original) claim to have 1.3:1 or 1.5:1 ratios.

[carbon]

Not keen on the contact angle between my new forged rockers and valve stems, presume this will result in premature wear to both rockers and valve stems.

 

I'm thinking the contact face on the rocker should be square to the end of the valve stem?

 

Should I return these forged rockers?

 

The cylinder head originally had late type rockers, I'm thinking I should get some new late type.

 

What would you advise?

 

I had same issue with a set of S forged rockers from Minispares about 5 years back. Several of them were twisted similar to yours.

 

Used brute force to twist them back so lined up more squarely. Took quite a bit of effort, but seems to have worked.

[nicklouse]

Standard rockers are supposed to give a 1.25:1 multiplication ratio but often fall short. 
 
Forged rockers give a 1.3:1 or 1.5:1 ratio (mine are 1.3:1) and are nice to look at. 
 
Roller rockers reduce wear on the valve stem tip but cost a lot and don't always fit  under certain rocker covers.

Slightly incorrect info there.
Standard pressed are 1.27:1 standard forged 1.22:1 standard sintered 1.21:1

Fair enough.  I should have said that the forged rockers which Minispares supply (which are not original) claim to have 1.3:1 or 1.5:1 ratios.

true. But you just said Forged.