Roller Rockers 1.5 vs 1.6

-
I know the feeling..
It took me 4 years to get around to buying the Viking shocks. They were $525 when I first found them.. Food for thought ;)

I found a set of 4 of these for 500... but dont want to replace shocks without doing springs. Mine are old and for a /6 car.
 
How do you decide on which ratio to get?

I didnt get any when I purchased my aluminum heads but now SM has all the SS rockers in stock ( well kinda...) so since they haven't had any in 7 months I think I may pick up a set... I kinda want 1.6 for a little "extra" lift from my cam but worry about valves hitting pistons?

Build...
30 over 340, pistons all around .012 out of the block
Xe268h camshaft
SM CNC fully assembled heads (pictured)

I know I know buy the expensive ones that are "better..."

View attachment 1715934923

View attachment 1715934924

View attachment 1715934925
Welll, researching rocker arms for my Ford 289, I came across mention of Miller rockers for high quality. Paul Kane bought all Miller's stock when Miller "retired", so I found his number and called him and spoke for about 20 minutes. He has Ford bodies but not the trunions to Miller's specs. He is contemplating getting Scorpion to do a run for him. They have a very similar trunion but one measurement needs to be changed. Paul.recommened I use Scorpion rockers for my street engine. If looking for that last HP or two waiting for his might be adviseable or use the Scorpions until he does a run. Now Mopar, I do not know.
A sort of local parts house speced Harland Sharp, but about $100CDN more than the Scorpion rockers, plus I would have to pay shipping to Canada. They bend you over the hood of a Lotus 7 on that here. I did pay about $75CDN shipping on my order from Summit, but that covers the rockers, guide plates, 7/16 rocker studs, PAC dual valve springs, push rods and a valve spring height micrometer.
What I am saying is that the most expensive may not be the best. Good advice is to find someone that knows that part of the business and that probably does not have a vested interest and is honest.
 
I found a set of 4 of these for 500... but dont want to replace shocks without doing springs. Mine are old and for a /6 car.

Get them. They're adjustable. They'll work fine with soft or worn springs.

That's the beauty of double adjustable!
 
Scorpion, hmm....
I know somebody who used them with a mild hyd roller cam & developed cracks around the roller axle pin. There have been other examples of the blue anodising fretting around the wrap around area of the trunnion. You might find pics of these on the web. One hopeful owner suggested it was just the 'paint' peeling...
Above is why I pay extra & use steel or s/s rockers.
 
How do you decide on which ratio to get?

I didnt get any when I purchased my aluminum heads but now SM has all the SS rockers in stock ( well kinda...) so since they haven't had any in 7 months I think I may pick up a set... I kinda want 1.6 for a little "extra" lift from my cam but worry about valves hitting pistons?

Build...
30 over 340, pistons all around .012 out of the block
Xe268h camshaft
SM CNC fully assembled heads (pictured)

I know I know buy the expensive ones that are "better..."

View attachment 1715934923

View attachment 1715934924

View attachment 1715934925
One thing to remember is, the the piston chases the exhaust valve closed and the intake valve chases the piston open.
 
-
Back
Top