XR7 Dave
Registered User
With the rocker arms from Intense you get a set of $25 pushrods. Really not something to get excited about. I checked with my sources and the basic price for the rockers is about the same anyway meaning there isn't going to be any great discount available for buying just the rocker arms regardless of where you get them.
As for geometry and exactly what is going to be required - well that is unknown at this point. Until you get the right length pushrods and check valve travel you just won't know. Geometry with the 3.8 isn't the greatest anyway and even with the 1.73's you need longer pushrods and shims both to get it close when using stock valves.
That being said, for someone looking for a mild performance upgrade I do a reground cam, matching pushrods, valves springs, and the Scorpion rocker arms for $550. No machining or fiddling around required.
What is the benefit of a reground cam with .520" lift vs. a stock cam with rockers that give you the same lift? People don't realize that lift is only part of the equation. You are still stuck with the stock timing which is by far the biggest factor in cam design. For example it is completely possible to have .600" lift and still have a stock sounding motor that makes it's power before 5000rpm or to have a .520" lift cam that runs all the way to 7000rpm. Ramp design and valve event timing are much more important than lift by itself.
I'm just saying that if you are going to spend $500 then I'd spend it on a properly designed cam. I'm still willing to buy a set of these and test them out if people really want to go this route.
As for geometry and exactly what is going to be required - well that is unknown at this point. Until you get the right length pushrods and check valve travel you just won't know. Geometry with the 3.8 isn't the greatest anyway and even with the 1.73's you need longer pushrods and shims both to get it close when using stock valves.
That being said, for someone looking for a mild performance upgrade I do a reground cam, matching pushrods, valves springs, and the Scorpion rocker arms for $550. No machining or fiddling around required.
What is the benefit of a reground cam with .520" lift vs. a stock cam with rockers that give you the same lift? People don't realize that lift is only part of the equation. You are still stuck with the stock timing which is by far the biggest factor in cam design. For example it is completely possible to have .600" lift and still have a stock sounding motor that makes it's power before 5000rpm or to have a .520" lift cam that runs all the way to 7000rpm. Ramp design and valve event timing are much more important than lift by itself.
I'm just saying that if you are going to spend $500 then I'd spend it on a properly designed cam. I'm still willing to buy a set of these and test them out if people really want to go this route.