A Serious Performance Chip at a Superior Price

The DFAS manufactured by Punk Performance is an interceptor piggyback styled performance chip and is more commonly used to map fuel mixtures on vehicles equipped with a MAF, MAP, Hotwire or Vane type air-flow meter.

It works by taking the voltage from the signal wire on one of these sensors. The signal wire on a typical MAF sensor for instance will have a variance in voltage of around 5 volts. The MAF sensor is primarily what the ECU uses to determine and control the air-fuel mixtures while the vehicle is under load. The DFAS is used to intercept this signal and place it on a MAP inside the main unit. The MAP can be up to 128 sections across depending on the type of vehicle its being fitted to. At each section of the map the voltage levels of the air-flow meter can be adjusted up or down, effectively allowing you to map out the air-fuel mixtures with the LCD controller. Simply view the load point being displayed to you, press the up button to richen mixture, push down to lean off. Its that simple.
The chip has a fine and coarse mode for tuning and can be calibrated for most MAF sensors 0-5 or 0-12 volts, It also has a 0-1V mode for controlling the signal of Oxygen sensors, great for changing closed loop mixtures.

The chip itself is extremely low in cost compared to similar products on the market, fitting is a breeze with only four wires to connect, it is super effective and very easy to use. This is an excellent option if you need to control your air-fuel ratios and don't want to spend a fortune doing it.

The DFAS Digital Fuel Adjustment System
· Overcome boost cuts
· Tune and Modify air/fuel ratios for power or economy
· Allow air-flow meter or injector swaps
· Change closed loop running characteristics
For further info or to get your very own DFAS just go to
http://www.punkperformance.com/


This demonstration is a Kia Cerato on its final run after being fitted with the
DFAS unit by Punk Performance.

The vehicle was basically stock on arrival fitted with a Cannon exhaust tip and K&N air filter. This year and model Kia stock standard is rated at 105hp. The vehicle runs fairly rich out of the factory, The Cannon exhaust and K&N Air filter fitted to this one improved power and Air-flow but left the vehicle running lean and slightly on the dangerous side. We implemented the DFAS Fuel Controller to add fuel throughout the rev range as a measure of safety. You can see power improved again and we now have a beautifully smooth running engine. The Changes made on the DFAS tune were very minimal and still has plenty of room for adjustment as needed up the track.
For example The DFAS can add fuel or lean off at any load point up to 128 sections each way.
The DFAS in this case the highest adjustment we made was 15 points leaving a further 113 point of adjustment if needed at that section.



This is the Dyno Chart showing before and after implementation of the Digital Fuel Adjustment System. We didn't get the chance to get a dyno before the Cannon Exhaust and K&N air filter were fitted. But you can look up the factory specs and see the 105hp rating.



Fitting of this chip was done by Daryl Robertson Auto Electrical Service in Horsham Victoria and the Dyno Tuning was done by Boss Muscle Cars in Horsham Victoria.


These guys are truly the best there is in the Wimmera there businesses are third parties to punk performance and operate independently. They treat all of our customers with the highest respect and have very fair pricing. They do a job once and the do it well. A special thanks to these great businesses.

Click here to view Boss Muscle Cars Website
Click here to view Daryl Robertson Auto Electrical website