Real data. EQ standard replacement Magnum head and comparisons with oem and NZ versions.

Be interesting to see what happens with the bigger valve.

My one experience with the NZ head was that cutting the seat for the 2.02 valve, using a back cut 2.02 valve, along with a quick bowl blend and tweaking the SSR got the flow to over [email protected] lift.
Between .550 and .600 the flow fell off(turbulence), and at .600 it was down to 250.

No work on the guide boss or pinch area.

It’s strange that when the heads started coming from China, that they didn’t make the ports exactly like what the NZ heads were.