It's time again to look and listen for the throaty roar of the cool and classy cars that benefit a good cause.

The cause is the Juvenile Diabetes Research Foundation that will host its sixth annual fundraiser car show Saturday at Cucamonga-Guasti Regional Park in Ontario.

Cars are the stars at the event, which welcomes customs and classics, muscle cars, vans, hot rods, trucks, low riders, exotics, motorcycles, and "rat rods."

The JDRF car show has become a real tradition, according to Kimberly Foltz, administrative assistant for the nonprofit foundation.

"We've added a pancake breakfast, a beer garden and live entertainment," she said. "What better place to relax and hear the tunes than on the grass by the lakes at Guasti Regional Park?"

Festivities run from 8 a.m. to 3 p.m. on the grass, with more than 400 show cars, eye candy to car buffs; raffles, prizes and games; a live DJ; 50/50; silent auction; the professional singing group "Desiah"; a pancake breakfast; barbecue lunch and the popular Hangar 24 Beer Garden.

Acoustic duo Bitter Honey will perform in the beer garden.

Spectators are expected to top 2,000.

"There's plenty of room at the park," said Steve Portias, a member of the organizing committee and president of Inland Vans Berdoo, a car show sponsor and the only club ever inducted into the Route 66 Hot Rod Hall of Fame.

"We don't get to cruise but this is larger than any car show I know of," Portias said.

"For the raffle winner, we are offering a chance to sit in a AA/Blown Fuel Fire Breathing Funny Car with 10,000 horsepower, which only a handful of people have experienced," he added.

There are 65 categories with a trophy for each, Portias said.

Because show vehicles are parked on the grass under the trees, it's cooler for attendees than walking around an asphalt parking lot, Foltz said.

"The sixth annual JDRF Charity Car Show and all JDRF community events help raise funds to help cure, treat and prevent diabetes."

The end result is that 80 percent of all funds raised by JDRF go to diabetes research and research education.

According to Foltz, 15,000 children and adults are diagnosed with Type 1 diabetes each year in the United States. Type 1 diabetes is an autoimmune disease in which a person's pancreas stops producing insulin, a hormone that enables people to get energy from food.

Type 2 diabetes is a metabolic disorder in which a person's body still produces insulin but is unable to use it effectively,

"We as a chapter are currently serving 1,000 families," Foltz said.

Vehicle registration is $30 and includes a goodie bag and dash plaque. T-shirts are available for $10.

There is no charge for spectators, however, Guasti Regional Park does charge a $10 entry fee for vehicles; $2 for pedestrians. Entry in show waives this fee.

Food, which includes tri-tip sandwiches, nachos, hamburger and hot dog meals, kettle corn and strawberry lemonade, is supplied by the Redlands Optimist Club and the San Bernardino Public Employees Association.

Festivities run from 8 a.m. to 3 p.m.; pancake breakfast, 8-10 a.m.; beer garden from 11 a.m. to 3 p.m.

Cucamonga-Guasti Regional Park is at 800 N. Archibald Ave.

Information: 951-758-4156.