Paul Walker Death -- Huge Car Rally Planned As Tribute

Paul Walker will be remembered by thousands of auto enthusiasts this weekend with a huge, noisy car rally ... but TMZ has learned law enforcement will be out in force ... gunning for any reckless drivers.

The car meet is scheduled to begin at noon on Hercules Street ... near the spot where Walker and Roger Rodas died in the fiery crash of their Porsche Carrera GT last weekend.

More than 20,000 people are expected to show up -- that's a lot of vehicles. City officials are urging locals to avoid the area altogether.

Law enforcement sources tell TMZ they'll be ready for trouble, too ... with a highly visible police presence to make sure the event goes off safely.