Both the front and rear shock absorbers can be adjusted automatically during the run by air circuits that are controlled by an electronic control unit.Since the 1970s, front suspensions have utilized MacPherson struts with control arms for rear suspensions, the design of choice is a four-link suspension with coil over shock absorbers connected to a fixed rear axle.Pro Stock cars are required to use automotive-type suspension systems.Pro Stock chassis are welded 4130 chrome-molybdenum alloy steel tubing, with an integrated 'funny-car style' cage around the driver that, combined with the safety restraints and helmet produce a very rigid and safe driving environment that was brought upon after a violent rollover crash suffered by Bob Glidden during the 1986 Commerce, GA round.Some have complained that the 'Stock' portion of 'Pro Stock' is not really all that accurate anymore, because so little, if any, of the race cars' bodies having their origins in the respective manufacturers' factories.Windows are manufactured from polycarbonate. NHRA Pro Stock racers use NHRA approved carbon fiber bodies.Although the five-speed unit (usually air-shifted) is still used in ADRL and Mountain Motor Pro Stock Association and in Air-Shifted three-speed units in Pro Modified, NHRA Pro Stocks utilize a Liberty or G-Force five-speed clutchless manual transmission. Since 1973, the most popular transmission was the Lenco planetary design, first used as a four-speed and now as a five-speed.These must be serviced after every run to maintain critical tolerances that can mean the difference between a good run or severe tire shake. Pro Stock clutches utilize multiple discs.In the NHRA, an electronic control unit (ECU) will be implemented on the EFI systems, including a 10,500 RPM limit, with modern engines approaching 12,000 RPM.The NHRA formula (starting in 2016) requires, and the PDRA Extreme Pro Stock permits, cars to use electronically-controlled throttle body fuel injection systems.(The hood scoop is illegal in the NHRA because of EFI) The tall intake manifolds necessitate the large hood scoop that is a signature of the Pro Stock class. The carburetors are raised above the engine the length and configuration of the intake passages ('runners') is critical to horsepower output. The most effective intake manifold configuration has continued to be the 'tunnel ram' for nearly 40 years. The intake manifold and heads are open to modification. sawn in half) so that each of the halves can be more accurately positioned over the slightly staggered intake runners. Those that use two four-barrel carburetors may allow them to be 'split' (i.e.Depending on sanctioning body and class, engines may either be four-barrel carburetors or throttle body electronic fuel injection and must be a naturally aspirated intake system.The Australian National Drag Racing Association and IHRA have a 400 cu in (6.6 L) maximum displacement engine limit.'Mountain Motors,' run by the PDRA (eighth-mile) and at selected NHRA events in 2019, do not have a 500-cubic inch rule, with some engines exceeding 800 cu in (13.1 L), to upwards of 1,000 cu in (16.4 L). NHRA Pro Stock engines are restricted to a maximum 500 cu in (8.2 L) single-camshaft, 90-degree V8.Each team will continue to machine and modify the part to their own standards. Engine blocks and cylinder heads are often provided in a 'raw' condition with only approximate dimensions and rough machining. All raw components must available to anyone for general public purchase.Except in the NHRA 500ci formula (starting in 2018), the engine must be manufactured by the same company as the car body.Designed to be easy to pick up for beginners while packing advanced tools for seasoned veterans, Stock + Pro helps you know exactly what is going on with your portfolio.ĭual 4-barrel carburetors on a 'tunnel ram' intake manifold Stock + Pro is the most popular investment app for OS X. Unleash the power of social news, discover what other investors are reading and get a better feel of the market! Advanced Stock Analysis. STCK.PRO revolutionizes how you gather financial news by combining trusted financial sources with the power of social news! The perfect tool for every investor. Benzinga Pro is a real-time news streaming services packed with trade alerts, market screeners, audio. Check out Benzinga's top picks for the best stock charts in 2021. Join thousands of stock investors who capture news events before they drive stock price changes. Benzinga Pro is the best way to research the stock market for better trades. With Pre-Market PRO you have more control over your view of the premarket session! Sector & Industry Movers Summary Quickly see which sectors and industries are going to open up or down today.
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