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Restrictor-plate gamesmanship: Here’s how teams gained more speed

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DAYTONA BEACH, Fla. – Eyes dart and scan the surroundings. Satisfied we are alone, a grin emerges. Still, because of the sensitivity of the subject, the person speaks in a hushed tone. One does not loudly boast about outsmarting NASCAR inspectors.

But they do boast.

“Oh hell, I’ve got all kinds of stories.”

While NASCAR discourages rule breaking with more severe penalties — including the recent announcement that officials will disqualify any car that fails inspection after a race — the sport’s history and part of its charm stems from those who broke the rules.

This weekend’s Daytona 500 marks the final race with restrictor plates. Tapered spacers will control horsepower moving forward. And so closes a chapter of ingenuity by teams to find extra horsepower. The storytellers prefer to remain anonymous but are willing to share with NBC Sports their cat-and-mouse tales through the years with officials.

One person recalls a time in the 1990s in what was then called the Busch Series. This was back when nearly 10 cars would fail to qualify for the season-opening race. This particular team was in danger of failing to qualify.

The team’s luck changed when a garage veteran offered a tip on how to make more horsepower: Slip a couple of acrylic washer rings between the restrictor plate and the carburetor. That gap allowed more air to flow into the engine and create more horsepower.

“We got them in and our car qualified in the top 10 and we’re scared to death,” this person said. “We’re going to end up being checked (by NASCAR).

“We were hoping to be under the radar, come in around 20th or 25th and just be in the race and we’re being held and I’m like ‘Holy crap.’ ”

They were eventually waved by and didn’t have to go through inspection after qualifying. As they headed back to the garage, the driver told the crew member: “Make sure you get them out of there!”

They did. The team didn’t use the rings in the race because the draft was enough of an equalizer.

“Never did anything like that ever again,” the person said. “I’ve never shared that with anybody.”

The need for such creativity came after Bobby Allison’s car destroyed a section of fencing in the May 1987 race at Talladega Superspeedway. NASCAR sought to slow the cars to keep them from exceeding 200 mph and getting airborne. That led to the use of restrictor plates. They also were used for a time in what is now the Xfinity Series.

With an inspection process less stringent years ago than it is now, teams found ways to harness more horsepower despite the restrictor plates.

Sometimes it was quite elementary. One person recalled asking inspectors for permission to tighten a nut after the restrictor plate had been inspected.

“You would have a mark on the stud and you knew that (the mark) had to be at 12 o’clock and you would leave (the nut) at 10 o’clock,” they said. “You would turn it and it would leak air. It was like a tunnel (of air).”

Anything to get air into the engine.

“They were all talking about air leaks … like somehow leaving the carburetor loose or get back in there and loosening nuts because if you could raise the carburetor up, then you sucked air underneath it,” another person said.

Someone else talked of making the plates slide along the carburetor.

“As you cranked (the engine), the vacuum would pull it and it would give eight or nine horsepower,” the person said of the widened avenue of air to the engine. “Enough to haul ass.”

Another person talked about having a bit of sandpaper on a fingertip and rubbing the finger around the inside of each four rings to smooth them and allow more air to seep through the restrictor plate into the engine.

And another noted how they would “offset the center of the baseplate to the restrictor plate so it wasn’t lined up anymore and that created more airflow. You misaligned it by creating a special baseplate on the carburetor. There was no rule against it. … It was worth about seven horsepower. It was a really big advantage.

“Finally people figured out what you were doing, and they came up with a rule.”

As so often happened, rules were added and the game of getting additional air through the restrictor plate became more challenging through the years.

Still, what was done, makes for some entertaining stories.

“There are so many great stories.”

Glow in the dark: Cup cars get new look for All-Star Race

All-Star Race
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Wednesday’s NASCAR All-Star Race will be a little brighter than expected.

NASCAR announced Thursday that the exhibition night race at Bristol Motor Speedway will see certain competitors racing with underglow lights on their cars.

Cars that have automatically qualified for the event will have the lights.

Drivers who have already clinched an All-Star Race spot: Ryan Blaney, Alex Bowman, Kurt Busch, Kyle Busch, Chase Elliott, Justin Haley, Denny Hamlin, Kevin Harvick, Jimmie Johnson, Erik Jones, Matt Kenseth, Brad Keselowski, Joey Logano, Ryan Newman and Martin Truex Jr.

The light placement was first seen on Chip Ganassi Racing cars at Champion’s Week 2019 in Nashville during a burnout competition.

The best looking NASCAR burnout you'll ever see.

This might be the best looking NASCAR burnout you’ll ever see. 💨Monster Energy | Kurt Busch

Posted by Chip Ganassi Racing on Wednesday, December 4, 2019

The lights are the latest change NASCAR has made for the event, which will be held at Bristol Motor Speedway for the first time.

The race will feature the introduction of the choose rule. The rule designates a spot on the track where a driver must select if they wish to restart on the inside lane or outside lane.

Cars will also have special paint schemes that shift the numbers on the side of the cars over for sponsor placement.

Here is what upcoming NASCAR Cup races fans can attend

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Wednesday saw NASCAR announce the remaining regular season schedule for all three national series, including six Cup Series races.

In total, 10 Cup points races and the All-Star Race remain in the regular season, beginning with Sunday’s race at Kentucky Speedway (2:30 p.m. ET on FS1).

Due to the ongoing COVID-19 pandemic, not all tracks are allowing fans to attend.

Here are the fan policies for the remainder of the Cup Series regular season.

Kentucky Speedway (Sunday)

Fans will not be allowed to attend.

 

All-Star Race at Bristol Motor Speedway (July 15)

Up to 30,000 fans will be allowed to attend the race.

 

Texas Motor Speedway (July 19)

Fans making up to 50% of the track’s capacity will be allowed to attend.

 

Kansas Speedway (July 23)

Fans will not be able to attend.

 

New Hampshire Motor Speedway (Aug. 2)

Roughly 19,000 fans will be able to attend.

 

Michigan International Speedway (Aug. 8-9)

Fans will not be able to attend.

 

Daytona International Speedway (Aug. 16 and Aug. 29)

“We’re working towards having fans and hopefully we’ll have some news on when we’re going to go on sale in the next couple of days,” said track president Chip Wile Thursday on SiriusXM NASCAR Radio’s “The Morning Drive.”

 

Dover International Speedway (Aug. 22 – 23)

Speedway officials remain in consultation with local, state and federal health officials, as well as Delaware Gov. John Carney, on whether fans will be allowed in the stands with appropriate social distancing for the August events.

Weekend schedule for Kentucky Speedway

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NASCAR heads to the Bluegrass State this week for four days of racing at Kentucky Speedway.

All three national series will be in action, plus the ARCA Menards Series, for five races. The Xfinity Series will hold two races for its second doubleheader of the season.

According to wunderground.com, the forecast for the start of each race is:

Thursday Xfinity race: Partly cloudy, 86 degrees and a 20% chance of rain.

Friday Xfinity race: Scattered thunderstorms, 80 degrees and 37% chance of rain.

Saturday Truck Series race: Partly cloudy, 86 degrees and 0% chance of rain.

Sunday Cup race: Scattered thunderstorms, 84 degrees, 40% chance of rain.

Here is the full weekend schedule for Kentucky Speedway.

(All times are Eastern)

Wednesday, July 8

3:30 p.m. – Xfinity rookie meeting (electronic communication)

5 p.m. – Xfinity driver-crew chief meeting (electronic communication)

5:30 – 7:30 p.m. – Driver motorhome parking (screening in progress)

Thursday, July 9

11 a.m. – 1 p.m. – Xfinity haulers enter (screening in progress)

1 – 10:30 p.m. – Xfinity garage access (screening in progress)

6 – 7:30 p.m. – Xfinity engine prime and final adjustments (pit road)

7:50 p.m. – Xfinity drivers report to cars

8 p.m. – Xfinity race No. 1; 134 laps/201 miles (FS1, Performance Racing Network, SiriusXM NASCAR Radio)

Friday, July 10

10:30 a.m. – 7:30 p.m. – Xfinity garage access (screening in progress)

Noon – ARCA driver/crew chief/spotter meeting (electronic communication)

12:30 p.m. – ARCA rookie meeting (teleconference)

1 p.m. – ARCA crew chief meeting (teleconference)

4 – 5 p.m. – ARCA haulers enter (screening in progress)

5 – 5:30 p.m. – Truck Series rookie meeting (teleconference)

5:30 p.m. – Trucks driver/crew chief meeting (electronic communication)

6 – 7:30 p.m. – Xfinity engine prime and final adjustments (pit road)

7:50 – Xfinity drivers report to cars

8 p.m. – Xfinity race No. 2; 200 laps/300 miles (FS1, Performance Racing Network, SiriusXM NASCAR Radio)

Saturday, July 11

7 a.m. – 2 p.m. – ARCA garage access (screening in progress)

8 – 10 a.m. – Truck series haulers enter (screening and equipment unload)

10 a.m. – 5:30 p.m. – Truck garage access (screening in progress)

Noon – 1 p.m. – ARCA practice

2:20 p.m. – ARCA drivers report to cars

2:30 p.m. – ARCA race; 100 laps/150 miles (FS1)

4 – 5:30 p.m. – Trucks engine prime and final adjustments (garage area)

4:40 – 5:30 p.m. – ARCA haulers exit

5 p.m. – Cup driver/crew chief meeting (electronic communication)

5:30 p.m. – Cup rookie meeting (electronic communication)

5:50 p.m. – Truck drivers report to vehicles

6 p.m. – Truck race; 150 laps/225 miles (FS1, Motor Racing Network, SiriusXM NASCAR Radio)

6:30 – 8:30 p.m. – Cup haulers enter (screening and equipment unload)

8:30 p.m. – Truck haulers exit

Sunday, July 12

7:30 a.m. – 2 p.m. – Cup garage access (screening in progress)

12:30 – 2 p.m. – Engine prime and final adjustments on pit road

2:20 p.m. – Cup drivers report to cars

2:30 p.m. – Quaker State 400; 267 laps/400.5 miles (FS1, PRN, SiriusXM NASCAR Radio)

6:30 p.m. – Cup haulers exit

Thursday night’s Xfinity race at Kentucky: Start time, forecast and more

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A stretch of five races in four days at Kentucky Speedway begins Thursday night with the first of two Xfinity Series races.

It will mark the second doubleheader of the year for the Xfinity Series.

Can Chase Briscoe keep up a winning pace that’s seen him win three times in the last four races (and five overall thus far in the season’s first 13 races)?

Here’s all the info you need for Thursday night’s race:

(All times are Eastern)

START: The command to start engines will be at 8:13 p.m by Shady Rays CEO Chris Ratterman. The green flag is scheduled to wave at 8:24 p.m.

PRERACE: Garage access health screening begins at 1 p.m. (teams are assigned specific times). Engine prime and final adjustments are at 6 p.m. Drivers report to their cars at 7:50 p.m. The invocation will be given at 8:05 p.m by Jason Romano. The national anthem will be performed at 8:06 p.m. by Matthew Grant.

DISTANCE: The race is 134 laps (201 miles) around the 1.5-mile speedway.

STAGES: Stage 1 ends on Lap 30. Stage 2 ends on Lap 60.

INSPECTION: Ronnie Bassett Jr.‘s car failed inspection twice. He loses pit selection for Friday’s race.

TO THE REAR: Mason Massey and Bayley Currey (unapproved adjustments)

PACE LAPS: At the direction of race control, the entire field will go down pit road during a pace lap for pit road speed verification. If a driver stops in the pit box for any reason, pull over or slow down, they will start at the rear of the field.

TV/RADIO: FS1 will televise the race. Its coverage begins at 7:30 p.m. Performance Racing Network’s coverage will begin at 7:30 p.m. and also can be heard at goprn.com. SiriusXM NASCAR Radio will carry PRN’s broadcast.

FORECAST: The wunderground.com forecast calls for partly cloudy skies, a high of 86 degrees and a 24% chance of rain predicted at the start of the race.

LAST RACE: Chase Briscoe defeated Justin Haley and Noah Gragson to win on the Indianapolis road course.

LAST RACE AT KENTUCKY: Cole Custer beat Christopher Bell and Tyler Reddick.

STARTING LINEUP: Click here for lineup