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Effective Gear Ratio Calculator
Radial Tire Size Calculator
Horsepower Estimate by ET & MPH
Compression Ratio
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Converter Slip
Specs. for most Domestic Engines

 

 

 

 

News & Events

What's been going on at SD
05.05.14
We've made some changes over the last year or so. After a bunch of evaluation we came to the conclusion more >>
Spring 2013 is here!!!
03.06.13
Things are back on track in the shop and we're glad to see the economy seems to be picking up over spring more >>
What's been going on at SD
07.14.11
We'll to say things have been challanging since the landslide that took out our old shop in 09 would more >>