What is a R07 engine?
What is a R07 engine?
The new Chevrolet R07 is its first ever purpose-built engine, designed and developed by GM Racing specifically for NASCAR Nextel Cup competition. The new R07 is to succeed the championship-winning SB2 (small block/2nd generation) engine that has been used by GM teams in NASCAR Cup racing since 1998.
Are NASCAR engines small block or big block?
Since 1955, the small-block Chevrolet has been a staple of NASCAR, and it’s been 358 cubic inches since 1974. Cup cars have evolved from being stock-looking cars to cookie-cutter molds undisguisable without decals. The engines have taken a similar evolutionary path.
What is the Chevy NASCAR engine?
R07
Since 1974, Chevrolet has been running a 358ci V8 in NASCAR’s Sprint Cup series. Chevrolet’s latest NASCAR race engine, known as the R07, which debuted in 2007 is perhaps the most refined small-block in the world. The R07 shares few similarities with any production small-block in your driveway.
Who builds GM NASCAR engines?
Hendrick Motorsports and Richard Childress Racing confirmed Thursday that the two teams will combine forces to establish one common Chevrolet engine specification. In doing so, Chevrolet joins manufacturers Ford and Toyota in streamlining engine building to one supplier.
How many horsepower is a NASCAR engine?
750 horsepower
The engine in today’s NASCAR racecars produce upward of 750 horsepower, and they do it without turbochargers, superchargers or particularly exotic components.
What transmission does NASCAR use?
In NASCAR, all of the race cars have manual transmissions. They use a four-speed manual transmission called the Andrews A431 Transmission.
How do NASCAR engines rev so high?
This weird-looking thing is a valve spring. It has a very simple job: push an intake or exhaust valve – each valve has its own spring – closed when the camshaft rotates its lobe into the “closed” position. NASCAR teams used to employ the same valve springs used in street cars.
What brand of engine does NASCAR use?
Chevy first began a relationship with NASCAR in 1955, with its V-8 powered engine still used in racing to this day. A V8 engine has 8 cylinder pistons, with its components arranged in a V-shape, hence the name. It is the standard build for all NASCAR engines.
How long do NASCAR engines last?
Most production car engines are designed to last over 100,000 miles. NASCAR race car engines are designed to last one race (500 miles, in the case of the Daytona 500). While the same version of an engine is typically used for an entire season, it is rebuilt after each race.
Is the Chevy R07 used in NASCAR racing?
Chevrolet R07 For the first time since 1955, Team Chevrolet is introducing an all-new small block V8 engine in the top tier of stock car racing. The new Chevrolet R07 is its first ever purpose-built engine, designed and developed by GM Racing specifically for NASCAR Nextel Cup competition.
Why are the pushrods higher on the R07?
The R07’s camshaft is located higher in the block than the camshaft in the SB2, meaning the pushrods that it operates are correspondingly shorter and stiffer, improving valvetrain dynamics at high rpm. This raised cam also provides clearance for inboard piston squirters that spray the underside of the pistons with oil for cooling.
Who are the engineers of the Chevrolet R07?
A prototype R07 engine was running durability tests on a dyno six months after we kicked off the programme. The R07 engine development team included Ed Keating and Ron Sperry, who focused on cylinder heads and intake manifolds, and Ondrej Tomek, who was responsible for the cylinder block.
How big is the engine in a Chevy R07?
The Chevrolet R07 retains the pushrod/two-valve layout of the first generation GM small block V8, but this classic design has now evolved into a highly advanced racing engine. Per NASCAR specifications, the Chevrolet R07 displaces a maximum of 358ci (5.87-litres) with a maximum cylinder bore diameter of 4.185in (10.63cm).
