944 MAF kit: NA-Tune©
944NA owners, we haven't forgotten you!
The NA-Tune brings real MAF conversion for the 944NA (all 8-valve variants). Like the 944 Turbo, the 944NA uses a very restrictive air-flow-meter (AFM) from the factory. In-fact, the AFM in the 944NA is even more restrictive than the one used in the turbo cars! The NA-Tune changes this, offering many advantages:
- Plug-n-play kit, comes with everything needed to plug into your 944NA (with 28pin DME).
- Re-programmable memory-board, ensures the integrity of your tune; future tuning updates at no cost.*
- Free-breathing MAF sensor, with enough capacity to measure over 225hp!
- True 3-dimensional timing mapping, allowing more linear power delievery, and ability to adjust to other engine/performance modifications.
- Enlarged maps, allowing a more accurate tune, and improved performance.
- Enhanced closed-loop operation, which better understands driver-input to deliever improved performance and economy.
- Typical gains of 5-10% increase in Horsepower & Torque at every RPM!
- Enhanced FQS selection, now gives you much more control over fueling changes without affecting ignition timing:
Note - All of our Tunes requires a 28pin DME. See this.
*End user is responsible for shipping.
Dyno proven gains:
The only mod to our test 1985 944NA is the NA-Tune, everything else is completely stock down to the cast-iron headers. The dyno really shows what we've felt all along - great gains at every RPM!
What we see is an average of 8% increase in horspower and torque at every RPM! Furthermore, the part-throttle improvements are even greater due to removing the AFM restriction (at part-throttle the AFM "door" is still partially closed, blocking airflow).
Even more gains!
Continuing our quest to find even more power for the 944NA, while still keeping the modifications simple, we tested a common K&N drop-in air filter, a simple free-flowing "cat-back" exhaust, and an offset camshaft key from 928 Motorsports. The results were impressive:
That is a ~13% increase in power, and a ~16% increase in torque across the board!
The surprising thing was that a regular paper air filter made the exact same power as the "high-flow" K&N piece.
The Dying AFM:
The stock AFM is aging, and is no longer perfectly accurate -not even close...
This is an overlay of seven different 944 Turbo AFMs; all of these AFMs came from running vehicles:
