Thread: rocker arms breaking

launch control will cause a det motor to throw the rocker arms due bumping the rev limit continuously. As Mazworx stated the only real way to solve this is with a vvl head since you can't throw a rocker on a vvl head. Solid lifters and double grooved shims are the best you can hope for with a non vvl head. even with that done you will eventually still throw a rocker arm.

thanks for the help guys if i do the double grooved shims would it be as simple as just replacing the flat shims with groove ones of the same measurments and would a rocker arm stoppers also help on a solid lifter head as the gti-r

i broke 2 of mines once when i Miss Shifted lol..... and a 2nd time when i used the incorrect cams i put regular de cams on a RR and pop goes the rocker arms lol.... (thats the problem when you have to many laying around )

Live and Learn

Avoid rocker arm stoppers at all cost. I rather replace a rocker arm then a valve/motor.

On the W11 motor.

Get Springs and retainers, dual groove shims ( you have machine the rocker ) and RR lifters.

On the GTIR motor

Sell the top end for parts and put a VE head on it. You will pick up 20-40 WHP depending on the size of the turbo.

I have a RWD DET head with Tomei solid lifters, supertech springs, and WPC treated rocker arms. I rev to 8,5000 and haven't had issues yet. Of course, I only have 2k miles on the motor, lol, so knock on wood! However, you have to make sure your shims are sized perfectly, otherwise you will have issues.

Lay off the anti-lag lol when i was turbo and standalone the anti lag would pop a rocker arm every once in a while.

thanks for all the info guys the w11 I can put a vvl head on but the gti-r I invested a lot of money into the head so I am willing to try double groove shim so it can last a little longer I also have rocker stoppers on the gti-r motor so should I remove them

good luck!

Keep us posted with how your build goes.