Thread: recipe for 245+ whp on 2.0

fair enough in a way, but no matter what the rpm the car plans on staying in there is always benefits from running two lobe profiles. Obviously he got custom cams made for the car. It just means on a race car you low lobe may be a 12mm 280deg cam. I assume he didn't want reliability issues with the solenoids and rocker assembly at high rpms

Exactly. Also saves rotational mass.

hmm true. doubt it would give it any power, but if reving to 11,000rpm+ not having that mass would give peace of mind. I still think the benefits of a custom vvl cam suited to the rev range out weighs the negatives even in a race car, buts thats an argument for another day

I have a cam/ valvetrain setup that runs a single roller rocker setup for the VE heads. There is more clearance and better valvetrain geometry than a K20 head. Most of the parts are readily available in the industry to purchase and only 2 parts need to be custom made. With this setup I have calculated that you can run over 16mm lift without problems. Also, with this setup you no longer have shims for valve lash adjustment, you now have screw adjustment just like the honda motors.


I also have worked out a set of roller rocker Vtec rockers but they are heavy. The only thing I havent worked out is the LMA... I probobly wont pursue this setup because it is more expensive and more complicated.

It is also easier to make cams for this setup than a standard VVL head setup.

ok well that answers my question quite well. I knew there had to be another reason for it. 16mm that is just stupid.

16mm is just a rough estimate. With this rocker setup and slightly reduced base circle cam, With slightly higher than DE valve spring installed height, you can get more than 16mm but not sure if you would need to. The highest flowing VE head I have seen ( the 2 that I have) flow up to about .600" lift (15.25mm) before going linear. The one nice thing about this rocker setup that I have noticed is the ability to get to max lift much faster than a K20 rocker setup.

Also, the weight on this setup is less than half of the stock valvetrain setup.

great information always spoken by you charles.

stratton.