07/10/2026
B20 VTEC Dyno Tune 🔧
Not every dyno tune goes smoothly.
Previously tuned on a Hondata S300, the new owner reported that the car just didn’t feel like it was making the power it should.
Being a track-only car makes it difficult to diagnose on the road, so it was booked in for a dyno tune and check-over.
The first issue we picked up was the VSS not working — one of the conditions required for VTEC to engage with the existing settings.
After changing the parameters and confirming VTEC operation, we investigated the VSS wiring further and found heavy corrosion on the connector pins.
Fortunately, it wasn’t a major repair. We had new pins on hand, crimped them in, and the VSS was back working correctly.
Basic checks first before replacing the VSS sensor. Corroded wiring and connectors are a common issue we’ve seen on B-series Hondas over the years.
With everything sorted and the tune dialled in, the B20 VTEC made a healthy 134kW at the wheels and is ready to hit the track. 🏁
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