Ryan Blaney fastest in Dover Cup practice; Smith and Grala wreck

The top speeds all came from the second 20-minute session, which also proved the most dramatic.

Blaney’s average lap speed of 159.468 mph topped the overall speed chart, followed by Tyler Reddick (158.982 mph) and Chase Briscoe (158.478 mph) – all from Group B.

William Byron was fastest in the Group A with an average lap speed of 158.954 mph.

Both Zane Smith and Kaz Grala hit the wall hard in separate incidents in the second session.

Among those drivers who ran at least 10 consecutive laps, Byron had the fastest average lap speed (155.405 mph). Denny Hamlin and Ty Gibbs were second and third, respectively, in that category.

Group B

Following a nearly 10-minute delay, the Group B session got under way with Blaney leading the way at 159.468 mph.

Reddick was second fastest at 158.982 mph and Briscoe was third (158.478 mph). Seven-time Cup champion Jimmie Johnson was fourth and Michael McDowell ended up rounding out the top five.

About six minutes into the session, rookie Smith had a right-side tire go down, spun in Turn 2 and backed into wall, doing significant damage to his No. 71 Chevrolet. Smith will move to a backup car and have to start Sunday’s race from the rear of the field.

In the final minute of the session, Grala got loose off Turn 4, then shot up the track and into slammed into the outside frontstretch wall hard, which brought an ended to the second 20-minute session. Grala will also move to a backup car and have to start Sunday’s race from the rear of the field.

Group A

Byron set a blistering pace in the first session with an average lap speed of 158.954 mph but it may have been at a cost.

After his first long run on the track, Byron corded his right-front tire after his 17 laps and his crew chief, Rudy Fugle, elected not to send the No. 24 Chevrolet back out on the track.

Ross Chastain ended up second quick (158.200 mph) while A.J. Allmendinger was third (158.054 mph). Allmendinger’s No. 16 Kaulig Racing team also reported a corded tire on his last run.

Chris Buescher was fourth fastest and Hamlin rounded out the top five.

Truck Series regular Corey Heim, who is substituing for the injured Erik Jones in Legacy Motor Club’s No. 43 Toyota and making his Cup series debut this weekend, ended up 14th fastest in the session.

“It’s just so much different,” Heim said. “I was just trying to find my limits but in a 20-minute practice, it’s pretty tough. This race for me will be a help to get a…