As reported by Engine Labs during PRI 2015, Dart has been working on a billet crankshaft that is a pretty substantial departure in LS crankshaft design.A Gen I small-block casting has a measurement of 19.25-inches between from front main cap to rear cap, while the LS Next has 17.50-inches at the same dimension, a difference of 1.75-inch (see photo). Apparently, that has been gnawing at the Dart folks for some time.
Here's what Engine Labs reported: “Somewhere, we’re missing that much counterweight in the front and the rear of the block. Without center counterweighting, and without any front and rear counterweight, we have a problem,” says Maskin (Dart President).“That’s where our new fully-counterweighted billet crankshaft comes in. It comes in 4.000-inch stroke at this moment, with an LS1 or LS7 snout. This fills the gap between the cheaper cranks — which work to a decent, 800-900 horsepower level naturally-aspirated — and works in those power-adder engines that don’t need a Sonny Bryant or Winberg crank yet."
Features:- 8 counterweights- Long and short snouts available- Heavy duty rod cheeks- Small hole through the rod pin- Rough balanced @ 1780 grams- No mallory required- 4340 Billet- 4.000” stroke