Lets talk science, Stillen Gen3 Intake

synolimit

You don't have to rescale the Stillen's as they are almost 100% the same ID as OEM.

I'm sorry but again it doesn't trick the ecu. The smoother flow and better filter increase the G/sec flow rate the MAF sees. As it increases, the MAF and ecu correct the AFR. There is no trick. Its just doing its job for better AFR and power. It's still not 100% optimal as its on the rich side (12.4-11.9 on my car) but its good enough to still stay safe and add power. This is why stillen uses OEM size MAF housing. There is also no taper. They just use a 3" filter to 2.5" OD pipe. So yes there's a taper but that doesn't matter as its only 3 inches long and it's no where near the MAF housing. The whole thing is the same size at 2.5" OD, same as OEM.

You don't get good results with the AEM. Tricking the ecu is garbage and to tune out that trick is garbage. I've seen it personally make a car have less hp then stock because of it. On a NA car you are no where near maxing out the MAF volts with the OEM size. There's no need to go bigger pipe and be forced to rescale the MAF. In fact have a bigger pipe will yield no results as you were forced to rescale the larger pipe back down to OEM size, the ecu will think it has OEM size again. Pulling in say 2 volts passed the MAF in 2.75" piping will give you the same g/sec vs pulling in 4 volts in 2.5" piping. Its a NA car. There is no forced induction. The car can only suck in air that its able to. Once tuned with timing and mods you're done.

I was getting to that keeping the compressor cooler with cooler air is always better. Bringing in 60 degree ambient temp vs 200 engine bay temps will always add HP! Doesn't matter if it has a intercooler or not. Starting at a lower charged temp vs a higher one will yield in a cold side intercooler with cooler denser temps. On my cars colder air didn't add psi as I was ecu and waste gate psi controlled, but using your example "you may get 1 more psi," I don't know about you but my turbos psi ran me 15-20 more HP!!! I'll take that all day long to put the filter in a cai vs a sri.

But if you already have a IC you're not going to buy another one. And again it does make a difference no matter the IC! If its 60 degrees out, a compressor is 250 degrees, that mix goes through the IC, and out the other side pops out 65 degrees it makes a huge difference vs you put the filter in the engine bay where its 200 degrees, the compressor is again 250 degrees, that mixes and goes through the IC and out pops 90 degrees this time. 30 degree intake temps is huge in HP! I've seen 20-30 HP swings playing with this stuff on my WRX's while tuning them.

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13 370z-