I had someone from a local car forum I’m on ask me about taking a look at his civic which he races regularly at Wanneroo Raceway as he wasn’t happy with a recent tune-up after a cam swap.
So with some spare time on my hands today we put it on the dyno. What was apparent straight away was the car was running extremely rich from idle until “VTEC” was activated around 6000k rpm & was lacking in power at all rpm’s below.
Considering this is the first time I’ve ever done one of these motors/ecu combo’s & it only took a few short hours to sort out. We got some pretty good gains below the vtec change over point along with gains in fuel economy both at wide open throttle and normal throttle points.