Jason3603

Wanted to throw this out there and see what the marine industry prefers. Is it prefered to use a stainless steel or aluminum shaft mounted rocker arm? The big players in the industry off both. Just curious what is used regularly in the marine industry.

Jason

Jason3603

No one uses shaft rocker arms? If not what do you guys use in big HP motors?

FIXX

iTrader: (2)

I prefer T&D shaft rockers but the amount of money they cost most will go with a crane style rocker..

DesertRage

iTrader: (2)

I believe it comes down to lifecycle and cost of the rocker arm. Depending on spring pressure, the aluminum version will eventually fatigue and crack, but comes with reduced weight as compared to a standard stainless arm and at a better price point.

Shaft mount rockers are a custom piece and come with many avaliable options if you want to pay for them. Stainless will be heavier unless you opt for a lightened version and will outlast the aluminum in terms of hours...

If your interested in a new set contact Bob Madara. He recently supplied me with T&D's and I couldn't be happier!

smokin' gun

iTrader: (30)

i run jesel shaft style due to solid roller high lift and high spring rates .i also run lash caps .2 seasons now the lash hasent moved .the system is nice and as others have stated expensive

MILD THUNDER

iTrader: (3)

I dont think its as much as a ''HP'' question, as it is a setup question. Point being, if your running a high lift solid cammed setup with lots of spring pressure and RPM, then you'll want either shaft rockers, or a good stainless rocker. If your running a moderate hyd roller, mild spring pressures, and mild rpm, a aluminum rocker will work fine.

Crower makes a nice stainless rocker. Crane, and Scorpion make nice aluminum rockers.

I just replaced two sets of crane gold roller rockers. They were stamped 1985. They served their purpose for 27 years. out of 32 rocker arms, two had cracked trunnions. Replaced with same crane golds, just newer. The newer versions are much beefier than the old ones.

Rookie

iTrader: (4)

http://www.offshoreonly.com/forums/g...life-span.html

Jason3603

I had a valve break and after Ferrea inspected the valve the conclusion was valve train instability. It was recomended I stabilize the valve train by going with a minimum .120 push rod and shaft rockers. Since I like to know the options of whats available rather than take someone's word for it, I typically do a ton of research. I like to make a well informed decision. I seen most manufacturers offer shaft rockers in aluminum and stainless. So I thought I would start a thread about it to see what was preferred throughout the marine industry.

Jason3603

Thanks for posting the link. A lot of info in there. Pretty much answers all of my questions. Thanks again.

articfriends

iTrader: (1)

Spend the money up front, something steel or stainless , skip the aluminum as they have a expiration date, run thickest wall pushrods you can with shaft rockers IF its in your budget and you will have a bullet proof vale train , I have had good results with T/D, Smitty