Lyle Barnett put the small tire community on notice when he reset the leaf spring record during the U.S. Street Nationals at Bradenton Motorsports Park last month with a booming 4.31-second pass at over 171 mph. That pass behind the wheel of Jason Digby’s 1969 Dart known as the “Tooth Jerker” was just a warning shot, because at Lights Out 8, Barnett and the Digby team laid waste to the entire Xtreme Leaf Spring Shootout field with a barn-burning performance. Barnett smashed his own record with another low four-second pass on his way to winning the event and he isn’t done yet.

The Digby camp came to Lights Out 8 on a mission to win the event for the first time using their new turbo combination. Previously, Digby’s Dart was powered by a nitrous-fed engine, but was still a definitive contender. This new Mopar-based engine has shown its potential during testing and put it all on display at the U.S. Street Nationals. And it’s befitting, of course, for a Chrysler product to snag the record, given the company’s history with leaf springs in their race cars in the 1960s.

During qualifying at Lights Out, Barnett and the team turned the wick up on the Dart and laid down an insane 4.24 at 181 mph. And according to Barnett, there’s even more left in the car for them to utilize. “I think the car has 184-185 worth of mph in it with another converter. [Tuner] Pete Harrell thinks it might go 190. That’s just unheard-of on a leaf spring suspension car. We know it has enough left in it to go into the teens, maybe the 4.0s if conditions are right.”

Look for Barnett to wheel Digby’s Dart at several more radial tire events this year, and maybe — or likely, given the tear the team is on — break his own record again.