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Wednesday, May 31, 2017

Chrysler Altered Wheelbase Drag Cars

streetmusclemag.com
Article thanks to Bradley Iger and streetmusclemag.com. Links provided:

Musclecars You Should Know: Chrysler Altered Wheelbase Drag Cars
May 5, 2017  By the mid-1960s the musclecar era was starting to hit its stride, and drag strip bragging rights had developed into a proven marketing tactic. The NHRA’s Super Stock and A/Factory Experimental (A/FX) classes were among the most hotly contested battlegrounds in drag racing at the time, giving the factory teams high visibility to amateur racers and potential garden-variety buyers alike while also showcasing the latest hardware that the companies had in development.
The 1964 race season had been good to Chrysler. The new 426 Hemi motor had taken the motorsport world by storm, setting records in NASCAR and finding success in both of the aforementioned NHRA classes, breaking national records at the drag strip as well. But the other factory teams weren’t going to take this Mopar dominance lying down.
When word got out that Ford was planning to equip its smaller Mustang and Comet bodies with a potent single overhead cam, 427-cube motor for use in the Factory Experimental class for the 1965 season, the engineers at Chrysler knew they were going to have to take drastic measures if wanted to keep the larger Mopars ahead of those Fords.
Jim Thornton, a Chrysler chassis engineer, was well aware that weight distribution was the key to getting the Hemi’s power to the ground out of the hole, especially when contending with the primitive tire technology that was available at the time. But the new power plant was simply a massive, heavy motor that added a significant amount of weight to the nose of the car in comparison to the engine it had supplanted for Chrysler’s racing program, hindering those weight transfer efforts.
To address this, Chrysler expanded its use of lightweight aluminum and fiberglass for body panels, replaced the door window glass with Plexiglass and the windshield with Lexan, while the engine team took some mass out of the 426 with a new set of aluminum cylinder heads and a magnesium cross-ram intake manifold. But the Coronet and Belvedere racers were still considered too nose heavy, so Thornton decided to go several steps further to distribute more of the car’s weight over the rear wheels.
The Original “Funny Cars”
While the Super Stock class rules yielded drag cars that shared the majority of their hardware with models and equipment that were available to the public, the A/FX class was significantly less restricted, allowing teams to develop packages that those companies never had any intention of offering through their dealerships.
Late in 1964, Thornton and the other engineers in Chrysler’s Race Group decided that the most effective way to distribute the car’s mass to the rear was to move the wheelbase as far forward as possible.
To do so they brought the front wheels up by 10 inches and moved the rear axle forward by 15 inches while shortening the overall wheelbase length by 5.5 percent. The end result was a 110-inch wheelbase drag car that put 56% of the mass over the rear tires, weight distribution that was unheard of at the time.
Five Dodge Coronets and five Plymouth Belvederes were allocated for the conversion, having their steel bodies acid dipped and then sent out to Amblewagon in Detroit for their altered wheelbase conversion before being delivered to factory team racers like Dick Landy, Ronnie Sox, and Al Eckstrand.
While there was no question that the altered wheelbase cars were significantly faster than their standard model counterparts, the Chrysler team hit a serious roadblock once NHRA got their first look at the new cars. Officials quickly drafted a new rule for 1965 that restricted wheelbase alterations to two percent versus stock for the A/FX class, effectively banning the altered wheelbase Mopars from the class they were designed to compete in.
But the cars’ wild appearance and impressive performance garnered massive publicity from the enthusiast press, and the cars quickly became a massive hit running match races in the popular and lucrative AHRA Factory Experimentals class around the country, where capacity crowds would turn up to see drivers like Roger Lindamood, Dave Strickler, and Bud Faubel pilot these “funny cars” to low ten second passes at nearly 140 mph. The cars got even faster once the teams switched over to Hilborn fuel injection systems mid-season in 1965.
Legacy
Though the term would eventually be adopted by fiberglass bodied, tube-chassis dragsters in the years following, the altered wheelbase Mopars of the mid-1960s serve as the origin of the Funny Car term and remain some of the wildest factory-modified production cars built to date.
With the popularity of Chrysler’s factory-built altered wheelbase Coronets and Belvederes, private teams quickly began building funny cars of their own, and the altered wheelbase craze quickly spread not only to other Mopar models but other makes as well.
Today, altered wheelbase cars continue to flourish in nostalgia classes across the country. But with less than a dozen of the factory-build cars in existence, and each with a notable racing history, the value of the original Chrysler altered wheelbase cars has only risen over the decades since their debut, with examples like Lee Smith’s Haulin’ Hemi II Plymouth Belvedere commanding sums well over half a million dollars at recent auctions.
While the performance of the AWB cars would be eclipsed not long after their debut as more advanced technologies found their way into drag racing, their unusual design strategy and wild appearance remains iconic for a specific time and place in drag racing history, and the fact that they immediately ran afoul of NHRA guidelines immediately upon their debut feels strangely similar to a situation that a recently-unveiled Mopar now finds itself in. The more things change…
http://www.streetmusclemag.com/features/car-features/muscle-cars-you-should-know-chrysler-altered-wheelbase-drag-cars

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