2ZR Turbo Yaris

[CrankyOldMan]

Having done zero research myself, I can't verify how accurate the wikipedia article is but it suggests that the MAF vs blowoff issue is fairly common and can be compensated for by placement of the MAF.

[06YarisRS]

Originally Posted by CrankyOldMan

Having done zero research myself, I can't verify how accurate the wikipedia article is but it suggests that the MAF vs blowoff issue is fairly common and can be compensated for by placement of the MAF.

Thanks Sam. Great read.

My BOV is before the MAF sensor, so a blow through system as opposed to a drwa through system. The kit, I believe, was designed purposefully as a blow through type. I found the SR20DET example interesting in the respect to the necessary relative position of each piece.

According to my tuner, we are basically trying to get a economy car to perform in ways that it was obviously not intended to and the hard part is reconciling the piggyback's and the ECU's handling of open loop and closed loop operations. I think I'm getting close to a good tune and I asked him if when we achieved a good tune for this car if it would remain stable. He said, "definitely". It will just take tweaking to make it 'perfect'. I'm still having some minor idling issues and overall the car is running a tad rich, evidenced by a bit of soot in the tailpipe. I do want to get this ironed out because not doing so could potentially result in high EGTs and issues with the cat converter. That said, it seems my car is rich only under vacuum conditions and relatively low power demands, so excess heat may not be an issue. I'll keep tweaking the fuel map.

Thanks again for the article!