Full Answer
How big is the camshaft on a GMC Pro Stock engine?
The camshaft is raised to 5.750-inches and the oil pan rails have been spread .400-inch per side. If you have visions of secret lists of valve sizes, cam specs, port volumes and all the minutia that make up a modern Pro Stock engine, you may be disappointed−you're not going to find that information here.
What is the compression ratio of a NHRA Pro Stock V8?
But even though NHRA Pro Stock V8 engines are limited to 500 cubic inches (8.19-liter), two 4-barrel carburetors and 4.900-inch bore centers, some of their numbers truly tease a gearhead’s mind. Compression ratio is between 15:1 and 16:1.
What kind of engine does a NHRA Pro Stock have?
Chevy NHRA Pro Stock Engine 500-cid DRCE - slide 1 Tracing its roots to the Chevy Mark IV Rat Motor, the Chevrolet Performance Drag Racing Competition Engine (DRCE) delivers more than 1,400 electronically fuel-injected horsepower to a pair of Goodyears for a 6-second ride down the quarter-mile in an excess of 200 mph.
What is the weight of a NHRA valve?
NHRA imposes a minimum weight of 90 grams on the intake valve and 80 grams on the exhaust. Typical valves sizes are around 2.600-inch for intake and 1.800-inch for exhaust. NHRA also requires a spec fuel for all cars: For 2015 it was changed to Sunoco SR18.
What engine does NHRA Pro Stock use?
500-cid DRCEShrouded in secrecy, Chevrolet's Pro Stock Drag Race Competition Engine (DRCE) evolved the big-block Chevy into a 1,400-hp, 10,000-rpm, naturally aspirated motorsport weapon one race weekend at a time.
How much power does a NHRA Pro Stock engine make?
Modern pro stock engines generally produce around 2.5 hp/in3 (114 kW/L), and make upwards of 1,500 hp while being naturally aspirated. A complete NHRA pro stock engine can cost upwards of $100,000.
How much HP does a NHRA Pro Stock make?
Pro Stock engines use electronic fuel injection and spec gasoline and are restricted to a maximum of 500 cubic inches. They can make in excess of 1,300 horsepower.
How much does it cost to build a NHRA Pro Stock car?
A pro stocker at 125k+ has to be the most expensive car to build. 1 motor has to be in the 150k+ range as well. A guess the only thing that would make a fueler more expensive to run is the parts attrition.
How much horsepower does a NHRA Funny Car have?
One cylinder of the eight cylinders of a Top Fuel dragster or a Funny Car produces 750 horsepower, equalling the entire horsepower output of a NASCAR engine! … The gasoline-powered engines of NHRA Pro Stock cars produce about 1,200 horsepower; about eight times that of the average street car!
How much does a Pro Mod engine cost?
That said, a pro mod drag car will cost from $275,000 to $350,000. The body and internal parts generally cost around $200,000, while the engine costs between $50,000-$100,000 extra. This may vary based on other vehicle specifications, but the price will always be high.
How much does a Top Fuel dragster engine cost?
about $500,000Answer provided by. While a pro mod drag car will run anywhere from $275,000 to $350,000, a Top Fuel dragster costs about $500,000. Top Fuel engines that displace 496 cubic inches are most common, and these cars can weigh about 1,000 kilograms. Top Fuel dragsters can produce over 6,000 horsepower.
What is the difference between Pro Mod and Pro Stock?
Whereas Pro Stock cars retain street identification, Pro Modified cars' bodies are just that: modified. Pro Mod race cars have either a forward-facing (with the opening in front) hood scoop for nitrous injected cars, or the hood may be cut to allow a supercharger to be fitted through onto a blown motor.
What is the fastest quarter-mile Top Fuel?
The fastest speed on record is 338.17 mph (Top Fuel) at 1,000 feet. A Top Alcohol Dragster can travel as fast as 285 mph in the quarter-mile. However, in drag racing, elapsed time is the determining factor in winning rounds. The quickest Top Fuel pass on record is 3.623 seconds.
How much does an NHRA funny car cost?
Today, fielding a Funny Car team can cost between US$2.6 and US$3 million. A single carbon fiber body can cost US$70,000. Nitro Funny Car racing in 2020 has become a one-team, one-manufacturer monopoly....Most NHRA Funny Car wins.DriverWinsGary Densham826 more rows
What is Spintron machine?
Spintron machines are used to physically run the rotating assembly and valvetrain components while allowing the operator to collect invaluable data. The Spintron machine uses an electric motor to spin the engine, so you can witness and record valve movement at real engine speeds.
How does an overhead cam work?
Overhead cam engines often have the cams riding directly on the machined aluminum heads with no bearings. The cam (or cams) is driven by a chain or belt arrangement off the crankshaft. To remain in time with the four cycles, cams spin at half the speed of the crank. Maintaining this relationship is critical.
What is the role of the camshaft in a valve?
The camshaft is the brain that actuates lifters, which in turn moves pushrods and rockers to open the valves. Once the lifter crosses the nose of the lobe, valve spring pressure forces the valves to shut. As you can imagine, the relationship between the lifter and the cam lobe is pretty important. It’s critical that the lifter follows ...
What is the relationship between the lifter and the cam lobe?
It’s critical that the lifter follows the lobe through the range of motion; any float or bounce can lead to a loss of performance or broken parts.
What is the brain of an engine?
Grinding it Out: Tips to finding the best cam for your application. It’s often said the camshaft is the brain of the engine because it dictates the opening and closing of the valves, thus controlling the flow of air/fuel mixture to the cylinders. That’s the simple explanation, but there’s more to the story. 20 Apr 2020.
What is degreeing a camshaft?
Degreeing your camshaft is the process of installing the camshaft, so it is timed perfectly to the crankshaft, rather than just hacking your engine together, crossing your fingers, and hoping for the best. Even if a cam is ground with perfect phasing of the lobes to the dowel pin, you still have crank phasing, key-way position on the bottom gear, ...
How many degrees does it take to throw off a crank end?
If something is 1% off on the crank end, it’s going to throw you off by 7 degrees once it all reaches the camshaft. “The really bad part is, if you are off, you don’t find out about it until you get the engine in the car and it’s not running right. Degreeing a camshaft while the engine is on an engine stand is far easier than trying to do it in ...
How much vacuum does a Pro Stock engine pull?
Pro Stock engines will pull 25 or more inches of vacuum out of the crankcase, often using an electric vacuum pump along with the dry-sump pumps. Crew chiefs will cool down the cylinder blocks to about 40 degrees F before moving to the staging lanes.
What cars did the AHRA and NHRA race in 1970?
Teams ran the Chevy 427 Mk IV, Ford Boss 429 or 427 SOHC and the Chrysler 426 Hemi in lightweight ponycars and even compacts like the Chevy Vega and Ford Pinto.
When did Bob Glidden drop his engine?
Bob Glidden was forced to drop his winning Cleveland engine program in 1982 when NHRA mandated 500ci and start a new R&D effort with the Boss 429 platform. It did fit into the EXP he was driving at the time but reportedly drove “like a fuel altered.”. Ford archives photo.
How many inches are the bore centers on a BBC?
A traditional BBC has bore centers of 4.840 inches. NHRA allows Pro Stock blocks to have 4.9-inch bore centers. As the structure of the blocks became stouter, engine builders consistently enlarged the bore as far as they dared so that bigger valves could be stuffed into the cylinder head.
How many cubic inches are in a Pro Stock V8?
But even though NHRA Pro Stock V8 engines are limited to 500 cubic inches (8.19-liter), two 4-barrel carburetors and 4.900-inch bore centers, ...
How much pressure does an open spring have?
Open spring pressure is more than 1,500 pounds. The engines are approaching 12,000 rpm and making over 1,500 horsepower without a single pascal of boost—well, maybe a little more than just atmospheric pressure filling the cylinders at speed, but more on that later.
What was the first short deck engine?
Maskin’s first short-deck engine was a custom Merlin block. The casting cores were modified to provide a deck thick enough to trim the height down around 9.100-inch. “All it said in the rule book is that you had to have approval from a car company and reason to run a part then,” remembers Maskin.
How fast is Warren Johnson?
Winner of six Pro Stock World Championships, "The Professor" was also the first to exceed 180 MPH, 190 MPH, and 200 MPH in an NHRA-legal Pro Stocker . He was named as one of NHRA's Top 50 Best Drivers, and is a member of the International Motorsports Hall of Fame.
Why do you need a shorter rod?
A longer rod simply puts the wrist pin bore higher on the piston, which lets you build a shorter, lighter piston. By the same token, a shorter rod is lighter than a long rod, so you need to shorten the deck height to keep everything compact.
Can you rev an engine during a burnout?
which got the response "sometimes, especially if the driver gets overly enthusiastic on the burnout". For those of you who haven't been there, it's extremely easy to over-rev an engine during the burnout, since the tires are spinning so freely that the engine is essentially operating under a no-load condition.
What size cam is on a Chevy 113?
The cam is 286-292 on 113. I think the cam may be a bit too big because I only really want to run the motor to about 8300 or so.
Can you cam a mediocre intake port?
As the saying goes, You can get away with camming a mediocre exhaust port but you cant get away with camming a mediocre Intake port. In other words, you can make up for some deficiencies in the exhaust port flow with the camshaft.
Who wanted to test an engine without an oil pan?
Buddy Morrison wanted to test an engine without an oil pan. I didn’t think that was such a good idea, but he convinced me that we really needed to do the test. So we taped plastic engine bags on the walls of the dyno cell, put the oil pump pickup in a bucket filled with oil, and made a dyno pull.
Who owns the 1981 Camaro?
When NASCAR mogul Rick Hendrick acquired the original championship-winning 1981 Reher-Morrison & Shepherd Camaro for his collection, his good friend and well-known drag racer Roy Hill just happened to own the engine.