Another S/C'd member worried about his AFR - Toyota Yaris Forums

Nexus1155 · 03-24-2009, 04:45 PM

well holy crap if that the case, are you maxxing out the stock ones? any way to tell? I mean anything over what? 85% efficiency is bad you want it from atleast 65% to be running somewhat safe?

But see this is the problem, you have no way to scaled the injectors constant and must calculate this pretty good based on the amount of fuel it will be dumping in there....Larger injector + same constant = stays open for a longer time = more fuel = richer afr.... good luck

On a GT28 1.8T A4 I was tuning it started out with 210 or 280cc depending on the fpr with an afr of 11-12 while driving, swapped in the 550cc knocked us down to around 8.5-9.0 before i properly calculated the scalar to bring it back up. just to give you a headsup.

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03-24-2009, 04:45 PM	#11
Nexus1155 Bathroom + Laptop = <3 Drives: Audi Join Date: Aug 2006 Location: Dorchester Posts: 1,009	well holy crap if that the case, are you maxxing out the stock ones? any way to tell? I mean anything over what? 85% efficiency is bad you want it from atleast 65% to be running somewhat safe? But see this is the problem, you have no way to scaled the injectors constant and must calculate this pretty good based on the amount of fuel it will be dumping in there....Larger injector + same constant = stays open for a longer time = more fuel = richer afr.... good luck On a GT28 1.8T A4 I was tuning it started out with 210 or 280cc depending on the fpr with an afr of 11-12 while driving, swapped in the 550cc knocked us down to around 8.5-9.0 before i properly calculated the scalar to bring it back up. just to give you a headsup.