Daniel came in yesterday to get his 2009 Ralliart tuned with his new parts. Dan had brought in the car with the downpipe and testpipe installed along with an Ultimate Racing intake filter and adapter.

Dan also brought in a boost pill for us to install, which we did after our baseline.

So first up after the car is strapped down as we always do, we decided to baseline the car.

Personally I always datalog the car while baselining in order to see what state of tune the car is currently in and what we will need to do to get it where we would like to see it.

This particular baseline did not go as planned as upon our initial few seconds of testing the car, the AFR from the parts had the car at 13.8AFR at peak boost and it was sustainably lean until we aborted the pass due to the airfuel ratio.




We have been saying this from the beginning... STOP buying intakes that lean out the car. An intake system has one function, which besides filtration, to flow air. Outside of smooth pathing of the air, filter type and location, that is where the job of the intake should end.

We ADAMANTLY discourage the use any intake system with an enlarged MAF adapter section specifically designed to bypass unmetered air from the intake past the maf sensor. As in this case, the car ran DANGEROUSLY LEAN and catatrophic engine damage can occur over time.

After we aborted the dyno pull, we moved on to tuning the car which outside of fueling, worked very well.

Unfortunately for this buyer, he received great results however his fueling maps are maxed out at 7.4afr in the ECU and it is still in the 12's AFR due to the intake design.

So in closing, we would have loved to have a solid baseline for the car, but in our professional experience, it was too lean to forcefully run the car wide open and risk burning the pistons or valves.

Here is the dynosheet once tuned:

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