I'm just reporting on what I saw, the hand held tuner box is not intuitive - you have to read the manual or watch to figure out what to do with it and if your road tuning (2 persons) by the time you get to a load point on the tuner box, the car has gone way past it.

These days once you have the car idling on MS - turn on auto tune and let it build the fuel map for you. This does require a good wideband such as the AEM unit.

Now if your computer challenged then you should seek help to get the initial start up done.

10 mins with tuner studio (MS tuning s/w) and its intuitive.


I'm not saying that the SDS does not work - it does we have 5000 road miles to prove it... its just not very good for building a non straight RPM fuel curve - its just can't do it.

For a vehicle that is raced/driving at one location - its fine. Maybe the newer systems are better but you pay more $$$ for less capability.

Last edited by efi-diy; 09/19/14 01:02 AM.

51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them