At 7,500 rpm, the pistons in your race engine reach either top-dead-center or bottom-dead-center and change directions 25 times per second. That means the piston goes from traveling at top piston ...

This story appears in the June 29 print edition of Transport Topics. Old habits are hard to break, but engine parts that are tightened beyond specifications can be easy to break. For many engine ...

After purchasing a brand-spanking-new Harley, it's time to start doing what we do best and hot rod that sucker. Most of our Harley tech stories up to this point have concentrated on bolt-on parts for ...

In the pursuit of big power on a low budget, our '93 5.0L SSP coupe has shown a serious improvement with just a few bolt-ons and a couple of old tricks. Last issue, we advanced the timing; installed a ...