rocker arms?

[sean]

what rockers are you guys running with the 412 cam?

 

[berzerker]

Re: rocker arms?

im using crane 1.5 roller . except for a broken rocker stud after 1,000 miles, no other problems . but i dont think the rocker had anything to do with the stud breaking .

 

[scotts4]

Re: rocker arms?

i used the 1.5 rollers on that cam or you can go with the 1.6

 

[sean]

Re: rocker arms?

what is the diff in 1.5 1.6? also what springs are you guys running. i plan on going 202-160 with the heads fully ported and polish

 

[0260IN3]

Re: rocker arms?

The difference in a 1.5 to a 1.6 is .033 valve lift. To figure this out you take the lift (.500) divide it by 1.5 (std rocker ratio) then multiply by 1.6 to get your new lift.
.500/1.5x1.6=.533

I would recomend the comp 987-12 spring and the 730-12 titanium retainer is you can afford it. The lighter retainer is easier on the valve train and will allow a liitle more rpm with the hyd roller lifter.

Hope this helps.


Mark Campbell

 

[sean]

Re: rocker arms?

how may rpm can the springs handdle? do i need to do machine work to make them fit (not that it matters).which rockers would you get with the 412 cam?

 

[0260IN3]

Re: rocker arms?

Those springs can handle 5800+ without valve float with the titatnium retainers. (which is way more than you need) I would use the 1.6 rockers beacuse the sy/ty motors respond well to a little more lift.

The 412 cam and 1.6 rockers is a great choice to make some good power.

Mark Campbell

 

[MikeRenz]

Re: rocker arms?

.5 + 1.6 rockers = too much lift for stock valve springs and you are walking the line of float. Like Mark mentioned....get some better springs if you are going to use 1.6s