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Free Calculators

Power Goal Product Finder

Get product recommendations based on your Honda, current wheel horsepower, target, and fuel. Open the FK8TD Power Goal Product Finder.

Ethanol Blend Calculator

Ethanol Mix Calculator

1/4 Mile Calculator

Enter your vehicle weight and wheel horsepower to estimate performance.

1/4 Mile Time Calculator

Only for informational use. Actual results require verified dyno testing.

⚠️ DISCLAIMER: This uses standard physics-based calculations. NO artificial benefits are added below 500 WHP. View verified dyno data for our parts.

60-130 MPH Calculator (Please note flat foot shift time is based upon a .3 second shift which includes the time to come back into full power. This calculator is closer to ideal street conditions and NOT drag strip calculations.)

Make sure you chose the correct drivetrain configuration for your vehicle and this does NOT account for any uphill or downhill changes mid run.

A short rapid downhill momentary slope of 3 % for 1/4 of the run can reduce times as much as a constant 2% downhill.

This is only an estimator for potential NOT guaranteed outcome. Driver skill, tires, weather, road conditions, removal of weight out of the vehicle and random luck can change this outcome. It is more ideal to do sea level runs however it is pretty close to calculating high altitude down to sea level and up to 800whp. Humidity can greatly affect the outcome even if the DA is zero. At some point in extremes such as really low DA and high hp the calculator cannot account for all the variables. Calculator gets unstable above 850whp as there are too many variables.

60-130 MPH Calculator

Estimate your real-world 60-130 MPH roll time adjusted for weight, horsepower, drivetrain, road grade (-2% to +2%), shift technique, shifts, and density altitude.

Enter negative for below sea level (e.g. -1000), positive for high DA (e.g. 1500), or 0 for sea level
Enter negative for downhill (e.g. -1), positive for uphill (e.g. 1.5), or 0 for flat
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