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New Forged Rockers Contact Face Not Square To Valve Stems


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#1 mini-auto

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Posted 10 May 2019 - 11:29 PM

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?

 

c0iBOBr.jpg

 

 



#2 nicklouse

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Posted 10 May 2019 - 11:58 PM

dont look good to me.



#3 Moke Spider

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Posted 11 May 2019 - 12:55 AM

Hmm,,,, not good at all.



#4 Chris.Williams

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Posted 11 May 2019 - 02:09 AM

Where did you purchase those?
They look terrible.

#5 unburntfuelinthemorning

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Posted 11 May 2019 - 06:20 AM

Where were they from?  There are good ones out there, these were from Minispares about a year ago:  HOKB6uh.jpg



#6 sledgehammer

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Posted 11 May 2019 - 07:11 AM

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



#7 GraemeC

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Posted 11 May 2019 - 07:27 AM

I don't think there are any pushrods in



#8 Chris.Williams

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Posted 11 May 2019 - 07:38 AM

Where were they from?  There are good ones out there, these were from Minispares about a year ago:  HOKB6uh.jpg

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

#9 Bobbins

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Posted 11 May 2019 - 08:05 AM

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

#10 unburntfuelinthemorning

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Posted 11 May 2019 - 09:08 AM

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.



#11 nicklouse

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Posted 11 May 2019 - 09:33 AM

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

#12 unburntfuelinthemorning

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Posted 11 May 2019 - 02:43 PM

 

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.



#13 carbon

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Posted 11 May 2019 - 08:23 PM

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?

 

c0iBOBr.jpg

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.



#14 nicklouse

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Posted 12 May 2019 - 01:12 AM

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.




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