Originally Posted by
7milesout
However, there is something you can do that will open your eyes, and lift the veil from what you're doing. An AFR gauge.
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Really the main point at which a lean burn is going to be a (big) problem is, at WOT. At WOT, I'm going to go out on a limb and guess that even a 78 hp 3 cylinder's injectors are going to either be at 100% duty cycle, or very close to it at WOT. Spray NX in there dry, it's going to go lean. And at WOT, that's where the AFRs are critical. If it even leans it out from somewhat rich to stoich, it may be safe, but there's not going to be much or any power gain doing that. Stoich is not the optimal AFR for WOT power. So … no way I'd spray anything dry. Before I installed this AFR gauge, I would have sprayed dry. Now, no way. I didn't get to read the whole thread, but I don't believe you're going down the dry path anyway. I'm just saying my opinion is to never do a dry system, and I 100% support your choice to go wet.
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For (probably) all gasoline engines, max power at WOT is achieved in the 12.2 AFR range. When adding a wet shot, it is the same ratio. 12.2 AFR at WOT. I dare say, that 3 tapper could add probably 50 hp and be perfectly fine. As long as the AFR is not lean, and achieves in the neighborhood of 12.2, I bet the Mirage engine is plenty strong for 125 hp.