Coming in 2020!

LS Based SPEK Modified 

- Computer Controlled Engine Management    

- Stock Based engine configuration

- Performance Limited Engine Output

- Series managed and Locked ECMs 

Click on the icon above to view current parts needed list. 

Currently in the Research and Development phase, The SPEK Modified Division will be a heavily regulated modified sanctioning body. The concept of the class is to regulate almost every aspect of the car except for the Chassis MFG and the driver. Over the past 5 years the rise of the 604 and 602 GM crate divisions has been on the rise. Unfortunately the regulation and teching behind these divisions is clunky, cumbersome, timely and expensive.


For these division tech varies from sanction to sanction but usually consists of some sort of  external 'Seal', designated engine builders all the way to complete tear downs at the speedway. None of these methods encourage growth, camaraderie or retention. 

Fortunately GM has a answer to this issue and its not as complex as you might think. All of today's modern day engines run off of some sort of engine management system. These systems use a variety of sensors that monitor things such as the amount of incoming air (Mass Air Flow), Air to Fuel Ratio, Crank and Cam Position, Injector Pulse width and so on and so forth. All of this data is collected in the computer, analysed, bounced off a factory predetermined 'Map" and then used to properly tune a engines output to make it the most efficient. This allows us the opportunity to create a motor specific to our needs. By taking the computer and having it flashed with a series specific tune/map, then locking it out from outside interference, We can create a highly regulated engine.


How does all this work to keep 'Cheating' out? The answer is actually

simpler than you might think regardless of your own knowledge of

modern day car electronics. In order to make more power, you basically

need to do one of the following. Add more air, Add more fuel or increase

Displacement/efficiency. However, with our custom computer

tune/mapping we lock that ability down. If the engine sees more air

coming through the engine via a larger cam, the air to fuel ration

becomes lean and causes the engine to go into what we call a

"Fail Safe Mode". This fail safe mode only allows the engine to run about

2,000k RPMS and limits its overall engine power to about half. It will

continue to do this fail safe mode until it sees that the problem has been corrected. If you change the fuel injectors to flow more fuel, then the same ratio we discussed before now become rich. Thus leading to a engine "Fail Safe Mode".

This same concept carries through almost every single performance modification that could be performed up to lightening rotating assemblies and drive line components. These can monitored by engine output sensors and inspected with simple visual and scaling tech methods. 

So, now that your interested where do you find one of these engines? Simple, they are everywhere. This style of engine has been in almost every light duty GM Truck, Van and SUV since the early 2000's. There is a catch however... GM has had several different versions of the 5.3L LS Engine in its 20 years of production. These engines are all apart of the same family but some differ by having Aluminum engine blocks, provisioned for Drive by wire (No Throttle Cable), E85 Ethanol ready and other modifications. Each one of these different engine styles is still a LS engine but they have different engine "Codes". These engine codes can be identified by the vehicle identification number (VIN) or by block casting numbers. 

As of Late February 2019 the engine code under current series development is proprietary. However once we have determined which engine style is the best we will announce it with a full rules package.  

The typical social media marketplace postings has LS engines in the price range of 500-1500$ depending on the mileage. We do plan to de-power the engines slightly to help even the playing field for engines with high mileage vs those with lower. Engines will be allowed to have a aftermarket oil pan and cold air intake. These will be part number and manufacture specific. Currently we do still plan to regulate all pulleys, exhaust headers as well as other chassis components including a sealed shock package. 

Not a fan of complex wire harness and computer? Not a problem! The series

plans to make available a plug and play harness and ECM for under 500$. This

would include all directions and a "How to install" video. 

LS engines will require a electronic fuel pump to run. Electronic fuel pumps received a bad

name for their involvement in many fires in the 80s. With today's technology we can make the pumps much safer by incorporating engine oil pressure and gravity switches to prevent them from running when we do not want them to.


Does it sound like we have it all figured out? Well.....We dont, or at least not yet. Keeping with the Mid Atlantic Modifieds tradition we refuse to disappoint. The series will continue to test, re-test and re-test again before we release the final rules package and get the class up and going. I believe in this case its better to of never received than to of not received what you were expecting. 

Stay tuned for more updates! 


Ryne Pennington


Mid Atlantic Modifeds LLC