I received my dyno data the other day from Golen. I found the data very interesting and thought others might as well....
As a little refresher, the engine is an LS2-based 402ci with L92 heads, lightly ported. Originally it had an L76 intake with a 90 (or 92) mm throttle body. I'm replacing the L76 with an Edelbrock Victor Jr. and 4-barrel throttle body since I want to use a functional shaker scoop with my hood (without crafting an airbox.
).
There are 3 plots on the chart (I created the chart in Excel from the raw data):
- RED - original 242/248 Golen cam and L76 intake (not completely tuned, which accounts for the much lower torque below 4000rpm)
- GREEN - my custom grind 234/242 cam and L76 intake
- LIGHT BLUE - my custom grind 234/242 cam and Edelbrock Victor Jr. intake
Now, I expected to lose some low-end torque with the short runners of the Victor Jr, but I didn't quite expect to lose 60 ft-lb! Don't get me wrong, this engine should have plenty of power for what I want to do with it, but if I ever do decide to go back to a long-runner composite intake, I will know what awaits me.
