Custom Tractor Art - MaddKStudio.com
classic-tractor-news-logo

We Save You Time and Resources By Curating Relevant Information and News About Classic Tractors.

Classic Modified Pulling Tractors: Can They Do the Job?

By Tom Seest

Can Classic Modified Pulling Tractors Pull Their Weight?

At ClassicTractorNews, we help classic tractor lovers keep up with the latest news for classic and vintage tractors.

Classic modified pulling tractors are an absolute dream for hot rod fans. Built to appear factory standard but equipped with powerful automotive and aircraft engines that produce remarkable power, these classic modified pulling tractors offer unmatched driving pleasure.
Initial pullers utilized sleds that were loaded with a fixed weight, creating an exciting spectator attraction but posing a potential health hazard for themselves and spectators alike.

Can Classic Modified Pulling Tractors Pull Their Weight?

Can Classic Modified Pulling Tractors Pull Their Weight?

Mini Rods: How Far Will They Pull?

If you have the luxury of time when building your own big block tractor, consider entering the 1700# Limited Mini Rod Class. It is highly competitive and fast; running in most pulling organizations. Since rules may differ depending on which sanctioning group is involved before getting to work building your tractor; some organizations change them so frequently it would be prudent to consult them first before beginning construction.
Moving up in classes, you will arrive at the Modified Tractor series. These tractors most resemble Frankenstein’s dragsters with giant rear wheels and tiny front ones, plus multiple engines in them.
At this level, a shop can use all its experience in building highly engineered machines to the fullest extent. Anything goes as long as it doesn’t violate safety or weight restrictions – the engine and chassis tend to be among the costliest parts.
Some of these tractors feature OEM diesel blocks while others utilize custom built overhead cam engines; regardless, these machines are the fastest and most powerful tractors on earth; some shops even spend hundreds or even thousands of hours conducting research and development just to add extra horsepower.
Component Tractors have become an increasingly popular form of tractor due to their modular construction, much like modern NASCAR NEXTEL Cup cars or NHRA dragsters. Not only has this division gained in popularity due to safety and performance needs, but it has also opened many opportunities for shops that specialize in designing and manufacturing component pieces.
This class allows tractors with one turbocharger and up to 6,420 cubic inches of displacement to compete. They may run 24.5×32 tires and feature either water injection or air cooling; their weight tends to be slightly greater than Pro Stock but still very quick, and this class is an excellent way for new pullers to learn the sport.

Mini Rods: How Far Will They Pull?

Mini Rods: How Far Will They Pull?

Mini Rods with Big Block Power: How Much Pull Can They Handle?

Big block mini rods, the premier class in modified pulling, can produce up to 1,800 kilowatts of horsepower with their blown alcohol engines. Constructed from aftermarket Chevy V-8 engine blocks equipped with up to 14-71 hi-helix superchargers, these machines generate enormous torque output and are the go-to choice among tractor-pull enthusiasts.
The Big Block, Mini Rod class, began in the 1970s as an effort to add horsepower to classic farm stock tractors. Carl and Paul Bosse developed crossbox technology which allowed multiple engines to share one driveshaft; several tractors had single piston engines while some even utilized turbine engines which use explosive fuel explosions to spin rotating fan blades to generate turning power similar to aircraft jet engines – providing more turning force from each motor.
At this time, the weight transfer system was revamped to improve its efficiency by shifting heavier weights closer to the rear tires, thus providing greater weight distribution over the rear tires and making tractors more stable.
As the number of mini rods proliferated, NTPA issued rules restricting them to an engine displacement limit of 9,420 cubic centimeters (575 cu in). This measure wasn’t meant to prevent builders from creating powerful machines but rather ensured that the horsepower produced was within acceptable levels as per NTPA regulations.
Today, there is a variety of classes in the modified division that depend on engine size and power. Some utilize screw blowers while others utilize turbo or diesel engines; other groups remain true to original NTPA rules by employing alcohol-powered engines.
Tractors in this class all share one key characteristic – an impressive power to weight ratio. Depending on their spec class, these machines may weigh as much as 14,000 pounds! These tractors make for thrilling viewing as they often demonstrate incredible acceleration at pulling events.

Mini Rods with Big Block Power: How Much Pull Can They Handle?

Mini Rods with Big Block Power: How Much Pull Can They Handle?

Can Classic Super Stocks Pull Their Weight?

As its name implies, these tractors utilize multiple automotive engines to propel themselves across the track. Unlike other classes where tractor parts may be seen in use, Modified Super Stocks are custom built from scratch using multiple automotive engine powerplants – typically automobile engines, but also marine or aircraft engines can occasionally make an appearance! Racing these amazing engineering feats across a racetrack is truly spectacular and truly makes for an entertaining spectacle!
Classic Super Stocks provide an exciting step up in horsepower from limited mini rod class, making these vehicles very fun to watch race around a track. Their big block engines with up to 640 oil burning cubic inches power these tractors to incredible wheel speed before hooking a heavy weighted sled onto them for an exciting run down the track.
Starting off competitive pulling can be intimidating, but these classes offer a simpler route to competitive pulling for newcomers. No nitrous oxide or oxidizer is allowed, and all parts must be original or modified by no more than 25% from the original condition; transmission, rear end, and sheet metal must come from farm tractors, while any automotive engine mounted must appear stock on its frame.
Tractors that have been modified through welding, cutting, or drilling may only compete in the Modified Super Stocks Class, not in the more serious Pro Stock class that has strict rules.
Local truck and tractor pullers will find this class particularly exciting. Here, licensed trucks modified to compete include one restricted-size turbocharger with an intercooler. Furthermore, each vehicle must be used on public roads, either personally or commercially, without special tires or modifications not approved for on-road use.
An enjoyable way to experience competitive pulling is vintage tractor competitions in six weight classes that involve pulling a weighted sled across an obstacle-ridden course, with the winner determined by distance traveled over its duration. This event provides the perfect way for families and novice competitors to discover this thrilling sport!

Can Classic Super Stocks Pull Their Weight?

Can Classic Super Stocks Pull Their Weight?

Can Vintage Super Stocks Compete?

USA-EAST’s Tenth Year Pullers Division is now an integral part of their regional series. Following rules developed by Central Ohio Pullers, this class caters to vintage tractor owners wishing to run engines up to 680 cubic inches; therefore, they require extreme skill for success on the track.
Although these tractors resemble traditional farm tractors, they are highly modified race cars. All chassis, frame, and sheet metal must come from any make or year of the tractor; hood modifications may include alteration to accommodate an automotive engine/transmission combination; car engines must meet factory stock size/configuration regulations as well as be factory stock size configuration; however the class permits various modifications such as serpentine shifters, steel bell housing with aluminum fender flanges/fenders/front bumper/hood scoops that give each vehicle its distinctive look.
Tractors must utilize a 20-inch drawbar and be limited to no more than 10,000 pounds, they must feature a ring hitch no higher than 18 inches from a line extending from the center of rear tires to the center of front tires, with any wing bars placed no closer than 14 inches to center of front tires. A kill switch of breakaway type must also be installed and wired directly into the MSD/fuel pump before mounting an ABC fire extinguisher within easy reach of the driver.
All tractors must be fitted with both a safety belt and seatbelt for passengers in the passenger position, a deadman-style throttle with return spring, roll bar protection and fire suppression system are mandatory components of manufacture.
Classic Super Stocks were founded by former NMCA president Dave Campbell, Zajac, Kaufman and Hayenga in 2004 and quickly rose in popularity throughout their first four seasons on USA-EAST regional series. Now one of the fastest-growing classes, Classic Super Stocks have attracted an impressive array of tractors for this class to pull.

Can Vintage Super Stocks Compete?

Can Vintage Super Stocks Compete?

Please share this post with your friends, family, or business associates who may like old classic or vintage tractors.