Need help tuning for first time

[gsxofftheline]

I have all the bolt ons and supporting mods to start tuning but I am afraid i have never even tuned before. I just recently got 680's precision injectors and I set the deadtime so I can drive it for now. But for tuning I have eprom-ecu and dsmlink, putting on the wideband aswell. But when it comes to tuning, I am a newb to be completely honest. But I got to start somewhere. I researched the easiest way to tune and I came to the conclusion that its best with dsmlink and wideband. But I was reading up on dsmlink and it seems kind of complicated with fuel trims, speed density and air flow, and ecu.

My setup basically supports 350 whp but I am aiming for a safe 300 whp. I will be data logging but where do I start? Can someone point me in the right direction? Thanks

 

[JayRolla]

DSMlink is really not that hard. Read up everything you can on the dsmlink.com/wiki site. Also read some basic tuning guides for like the SAFC because it will help you better understand the fuel trims and how the ECU works.

You want to setup the injectors with global and deadtime. Make sure you adjust the global correctly for the new injectors which you can read about on the wiki.

Dont start changing really much untill that wbo2 is installed. Once it is and you have the fuel trims looking good. Which you want them close to 0% so the ecu has the most adjustability for the fuel. You adjust global and deadtime to get these as close to zero. Once they are between 0-5% you can start WOT tuning.

The wbo2 should read around 14.7 during idle and cruising which is done by the ecu and stock o2 sensor (closed loop). Once you go WOT the motor enters open loop and you want a solid AFR of 10.8-11.1 if running pump gas. I like to tune 0-10psi to around 12.5 and once it hits past 10psi I like to see a rich AFR around 10.9:1 when I tune pump gas. You use the fuel sliders to adjust this. The stock AFR is around 9.5:1 so its real rich to be safe. You will actually have to pull fuel out with the sliders to get a good afr at WOT.

Since you are running a small turbo like the 16g you will most likely have to pull timing to get any good boost because it likes to heat up the intake charge a lot with the small compressor housing. I would run 14-16* max timing and as much boost as possible without knock. .04* is the most knock retard you want to see in your logs.

ONce you read over all the links in the dsmlink wiki you should be good to go.