hadleycat

Thinkin about puttin the Scorpion Roller Rockers on my Gen V 454 mag. Anyone done this. Any performance gains? Any problems

Rookie

iTrader: (4)

I have run scorpions for the last 10yrs. You will not see any performance gains just adding roller rockers. Save your money. The new scorpion HD marine version is what I believe Mercury Marine is using on their new builds.

hadleycat

Thanks, I really should wait till the end of the season and do a bigger cam and rockers at the same time. Its getting too close to summer to pull my engine and do the cam right now. Thought I might gain a little by doing the rockers right now. I have the itch to tinker with my boat. It never seems to go away.

bcfountain

the biggest gain w/rollerrockers is not h/p gain but the lack of friction.w/rollerrockers there is less friction.less friction,less heat.less heat=happer motor and lower oil temps.

matthewr

Im not 100% but I think the Gen 5 and 6 rocker arm studs are not setup for adjustable rockers. Someone please correct me if im wrong.

http://www.cpperformance.com/c-367-r...sion-kits.aspx

hadleycat

I believe you are right, you have to buy the adapter kit 3/8 to 7/16

mike tkach

iTrader: (3)

when you do take the engines out,have the 3/8 holes drilled&taped to 7/16 threads,then you can use rocker studs for mark 4 heads,much stronger imo.

hadleycat

Thanks for all the advice gentleman, Right now i am finishing up some custom pipes to route my 496 manifolds and risers to my 454 mag. thru transom tips . Hope to have it on the water by this saturday. Turns out the 496 manifolds and risers are 1 3/4" taller than the cast iron 454 manifolds and risers. Fabricated an "S" pipe from aluminum to allow them to mate up properly.