Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Chevy Camaro Z/28 programmed with flying car logic

Most of the time when on a racetrack, or anywhere for that matter, you want to keep all four wheels on the ground. Sure, it's cool when a VW Golf gets a wheel up during an autocross event, still, it's less traction going to the ground for braking, accelerating or turning. But if you're really going for a hot lap, catching a little air is often par for the course.

Concept Car of the Week: Chevrolet Express (1987)

A fantastic selection of concept cars from the ‘80s were featured in Back to the Future II such as the Pontiac Pursuit, the Ford Probe or the Saab EV-1, but my personal favorite was the Chevrolet Express that almost ran over Marty upon his arrival in the year 2015. Before being a movie extra, the Express was presented in 1987 as another attempt from GM to adapt aircraft engineering to automotive requirements. GM had been experimenting with gas turbines for more than 20 years, dating back to the 370hp XP-21 Firebird from 1954, but that concept was quite primitive compared to its younger brother.

Camouflaged Cadillac ELR spotted on the road

Autoweek reader Josh Lindquist recently snapped these photos of what may be a camouflaged Cadillac ELR cruising around metropolitan Detroit. While the photos don't show the car from every angle, its lines are strikingly similar to those on the ELR featured on Cadillac's official Web site. The ELR first appeared as the Cadillac Converj concept in 2009.