Pro 4 Stock Car Series - Road Racing - Allison Brother Race Cars Inc.

Frequently Asked Questions

What is the minimum age to race in this series?
Because we race under N.A.S.A. rules and regulations for the road course series, the minimum age to compete is 14.
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Are you able to do engine work to the Allison Cars?
No. The Allison Legacy race series is a spec class race series. Everything about these cars are factory spec. The engines are stock Mazda engines that are sealed with lead wire seals from the Allison Brothers.
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How do you get a competitive edge with a sealed motor?
First, car setup. The Allison Legacy Race Car is a full adjustable chassis race car. Adjustable spring over shock, caster/chamber, toe, ride height, rear axle pitch, adjustable pan hard bar, and tire pressure. Second, Driver ability.
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If I purchase a road course car, is it able to run on the circle track?
The answer is yes. There are multiple drivers that run in both the road course and circle track series in Texas. The setup of the car is entirely different, but with a few hours in the garage, your setup can be changed to run in either series.
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How often do you have to replace your motor?
That is a very good question. We see very few motor failure. Because the engine is a true automotive engine that would typically run more than 100,000 miles they are very durable. Most engines run multiple seasons. Once a team decides that it is time for a fresh motor, the motor is sent back to the Allison Brothers for rebuild, or if you choose, you can purchase a new factory Mazda replacement, but only from the Allison Brothes. It must be sealed prior to comptition use.
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How much are the Goodyear Eagle tire to replace?
The current price for the Goodyear Eagle Short Track Special is about $108.00 each
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How often are tire replaced?
That depends on how the car is set up and how the car is driven. Typically, a team will use two to maybe three sets of tire in a season. Any more than that and you may what to review your setup.
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What is a quick change rear end?
The quick change rear end is made by Speedway Engineering. It is designed to make regearing of the rear end a simple and fast task. The back plate of the rear end is secured with six 9/16 nuts. Once the nuts are removed the two drive gears are slid out and the new gearing is installed in its place. The whole operation of regearing the rear end takes no more than ten minutes. The number of gear ratios that are available are somewhere around 30 different ratios.
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What is the cost of replacement body parts?
The cost of replacement body panels varies. They range from $80 to $200. A whole new body set is in the range of $1600.
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