Thread: roller rockers ?

if i was to go with a set of roller rockers w/the mods i have plus a intake . what size would be best to go with ?

1.9 modded stocker from ZZP. I had them on my car and just ordered a set for my sons GTP

what kind of performance gains did you get from them ? did you feel the difference ? did you have to get anything else ? springs , ect ????

now between the modded 1.9 stockers($300) and the 1.9 alum. roller rockers($400) what is the big difference ? would they be worth the extra $100 ?

Originally Posted by bayareagtp

now between the modded 1.9 stockers($300) and the 1.9 alum. roller rockers($400) what is the big difference ? would they be worth the extra $100 ?

If ZZP still has their sale, you can get any of the rockers, +$1 for springs, +$1 for retainers, +$1 for the rocker install kit. However, if the sale is not still on even with the modded stockers you should buy some new (reusable from PRJ) rocker bolts and valve cover gaskets.

If you get 1.9 rollers you would have to change out springs and retainer too, some recommend pushrods. I beleive I heard they are harded on the timing chain tensioner and with an old one that may be a bad thing.

I can't imagine there is much (5) HP difference between the 1.9 modded and 1.9 RR.

Yes you can feel a difference at the top end where the rockers come in to play. Probably good for 20 HP.

nice . yea it sounds like the modded 1.9 rockers are going to be my choice . thanks .

They are a good mod that require no real supporting mods and have virtually no negative side effects. One day you will move to a cam, IC, or both but for now this will be nice.

Torque specs on the "new rocker bolts you will be getting".

If TTY - 11 lb ft +90*
If reusable CC or PRJ - 25 lb ft
Valve covers bolts - 7 lb ft

Make sure your clean the mating surfaces between the VC and the heads. Also using Q-Tips, clean ALL of the oil and metal shavings out of the rocker bolt holes before installing the new rocker bolts.
The assembly lube should be applied to the rocker at the tip where is rest on the valve and the other end where it rests on the pushrod and the sides of the pivot. Go sparingly and eventhough it is a small amount of lube it will do all 12 rockers.
One last thing. ZZP mills out the pedistal so the pushrods will clear. I found those to have sharp edges and burrs, a quick hit with a file fixed that.

thanks for the info

Do you ever plan to cam?

no nothing that major just rockers and mostly bolt ons . maybe later if i blow up this engine or when it goes out i will rebuild another with heads , cams and the works but until then i would rather do bolt ons .

Look at the YellaTerra Kits from INTENSE. $400 but come with new rods, then you just need LS6 springs and valve cover gaskets. So about $500 for a great setup.

nice i think i have a couple ideas now to go with . keep them coming if anyone has any other help with rockers .
thanks !