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Effective Gear Ratio Calculator
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News & Events

End of 2018 is fast approaching!!
12.04.18
Well it's been a while since we had an update on what's been going on at SD so here's a quick overview. more >>
Northwind Intake manifold Dyno Testing.
12.23.09
Well we had a chance to test the new Northwind on a 535 pump gas hyd. roller engine recently against more >>
2009 What a Year!!
12.19.09
Well we're coming to the end of 2009, to say it's been a challenge is an understatement. Three days into more >>