Marco wrote:

MachTJ wrote:

Also make sure the rocker stud does not contact the rocker arm on the bottom during its range of motion. Sometimes you may have to elongate the slot in the bottom of the rocker, but usually if there is a high lift cam in the equation. Just a suggestion as who knows what the quality control is on the rocker arms and some may be close or contact the rocker stud, which can cause some serious failure if anything limits motion and will end up breaking.

I agree with the opinion the pushrod are too short, and check for interference from rockers to rockers studs.
I arrive just from this experience that cause a lot of problems also to the valve guide and seat.

The short push rods (the one seen is adjusteble) are necssary for keeping the contact pattern on the valve stem in the middle to avoid guide and seat problems.

My only concern is the the pushrod to rocker contact, and rocker to stud wear. There is no interference issues.

Marco, I like to know more about your problems - was your experience only valve guide and seat issues ?
 

Just found this video - interesting !
https://www.youtube.com/watch?v=o5is9BsH5OU
So in my scenario I am actually making more valve lift, not too bad.

I just have to live with the fact that it's now really hard to get a socket on the stud bolt for adjustment at this rocker angle    And hope for not too much wear..

Going to post a pic more of the same mock up.
This mock up is with brand new head gaskets which are very very close in compressed distance to my final head gaskets. And the heads are torqued to specs. It is with length adjusteble pushrods.
Rocker arm ratio is standard 1.6.
Yes it is new 6 point head ARP head bolts cause I want the original look of it.

Anybody run those 1446-16 roller tip rockers ? I'm still not confident that this steep rocker geometry will work properly in the long run ? 
 


 

Hi Folks! Tried to test assemble my 302 today to determine the required push rod length, which came in short at 6.55" with the roller centered on the valve stem. I have Comp Cam Magnum 1442-16 Roller Tip rocker arms and a mild cam (Lunati 10310101LK) with valve lifts under 0.500". 

But... I think the angle (and the arch of motion) of the rocker arm is far from ideal? This is also making the contact surface on the valve stem wide? I don't know if this is ok for a street engine? I'll post some pictures.

What do you guys think? There is no crazy cam or valve lift but I would like to rev the engine to 6500 without any headache