Post by
nametakennow »
https://forums.nicoclub.com/nametakennow-u713.html
Fri Feb 29, 2008 7:35 am
MAF sensors (as well as AIT and every other automotive sensor I can think of) are basically a variable-resistance resistor in an electrical circuit with the ECU. A MAF sensor's resistance varies depending on the amount of air going by. Even if you enlarge the chamber the MAF is in, the engine will still be pulling the same volume of air. The same goes for the sensor. Just because it's capable of reading more air than the stock one doesn't mean it will since, again, the engine will be pulling the same volume of air.
Furthermore, if you did "trick" the ECU into thinking there is more air coming in than there is, it would simply add more fuel. More fuel does not mean more power. In fact, because engines are tuned to be slightly rich to begin with to make sure that detonation can't happen and the engine will last long-term, further biasing the air/fuel ratio towards fuel is counterproductive. An overly rich mixture reduces power and fuel economy.
If you replace the rest of the intake system with higher-flowing pipe, you will increase mid and upper range horsepower somewhat because the engine will be able to pull a little more air at wide open throttle. Even then, however, the MAF will not be anywhere near maxed out, so there is no point in replacing it.
And yes, there are a few other engine mods out there for the GA. Unorthodox makes pulleys for it. You could even fabricate a throttle body and/or intake manifold spacer. You could also port and polish the intake manifold and exhaust ports. Heck, if you looked around you might even be able to find some pistons and rods that would fit for a higher or lower compression ratio (depending on whether you went with a turbo or not).
That said, once you get to the point of changing internals, even cams, it's cheaper and easier to do an SR swap. I suppose that logic would mean that it's always cheaper and easier to swap in a bigger engine or get a whole new car, but obviously there's a point where that logic simply becomes outrageous.
Tangent aside, your best bet is to keep it simple with the GA and save your chips for an SR, or accept that this car is going to be a slow and economical daily driver and save for a more performance-oriented car later on. If you really don't want to deal with a swap, then you can make the GA respectably powerful with a turbocharger, but that will be just as expensive as a swap and, in some ways, more of a headache if you don't know much about the parts involved.