https://www.nopistons.com/forums/pub...1047683561.gif this may be the stupidest thing that someone has ever asked, or it could be a pretty good question. I was sitting around the other day and was wondering what to do with my air pump and ACV on my N/A S4 since i dont have any cats. then i got the idea that maybe i could leave the air pump on and duct it into my air intake right behind the AMF (take off the ACV of course). I thought about it for awhile and started to think that it might work. I was wondering if this would be like a makeshift supercharger or would it just be the stupidest thing and wouldnt work. if someone has done this or has thought this out further tell me how and what the results were. https://www.nopistons.com/forums/pub...1047683894.gif



BTW i have a modified throttle body, a cold air intake, and no cats so far as to mods

i dont think the airpump would spool up fast enough ( probably have the same rpm as the motor?) , turbo's and superchagrers spin at incredible speeds, even electric superchargers barely make any boost.

the air pump doesnt move enough air to make a difference, but you could use it to open your six ports

Would that do anything usefull?

yes

I was thinking about putting my air pump back in just so I can control the 6 port activation.

me too, but that involves finding it first



mike

The air pump only controls the auxilary ports in 89-91 cars. aslong as you have an exhaust that hooks up to the split air tube and is designed for it your ports should work if you have an 86-88 car.





Santiago

I know that... I meant I was thinking about putting it back in with a T fitting, RPM activated switch and valve so I can control at what RPM they open as opposed to the backpressure pick up tube which barely opens them until about 6k at this point (not enough backpressure anymore).



There is a good S4 "six port solution" write up somewhere on the net about this.. I don't have the link here in front of me.

Here's one:



http://hypercircuit.com/rx7pages/jaysrx7/6.../6PortSolution/

I wonder if i could put a bigger pulley on the air pump so that the pump spins faster therefore pumping more air. either way is is still putting more air into my engine so it should help a little bit, shouldn't it?

If you want the pump to spin faster you would need to use a smaller pulley not a larger one. A big one would slow the pump down. However I do not know if it will be beneficial.

prolly not, it'll just come apart faster

Keep in mind, that you still need to obey the laws of thermodynamics. If the airpump could push enough air into the system to make a difference, without pulling energy from the engine, then it would work. However, the airpump is going to pull more energy from the engine that it can contribute, this is a law of physics. Otherwise, imagine putting say 4 airpumps on the engine, have each push ait into the intake, and get a massive boost. If this worked, every car would have it.



Also, the airpump requires that you *remove* air from the intake, you are basically just recycling air them (air comes into car, some gets diverted to airpump, *heated*, then dumped back into intake). Some of that air you just dumped in would get pulled back into the airpump, especially if you spool it up some.



This same law of physics means that the idea someone had a few days ago about running an AC line around the intake to cool it would not work, same reason, you can't get something for nothing.

doesnt an actual supercharger take power from the engine to run it though? even though it is not as significant as how much power it creates. and my airpump doesnt take air from my intake anymore thanks to mu CAI

the air pump doesnt move enough air to make a difference, try it you'll see



mike

A supercharger isn't a magic box under the hood. You still need upgraded injectors, intake, exhaust, timing...the supercharger just allows these other mods to work effectively. You are gaining power, but you still put in more fuel to get there, therefore you are still not getting something for nothing.

Don't waste your time, turbos spin @ 120xxxrpms to creat boost..

try it, i did way back in 94.



mike

Well, there goes that idea! https://www.nopistons.com/forums/pub...1047683664.gif thanx for explaining this whole thing to me! are there any other small mods that i could do that dont involve ripping my engine back out or any serious thing that would help the performance of my N/A? i already plan to get a new chip and a better exhaust, what else?

Not only will the airpump not move enough air, but if it did, it would escape right out of your air filter. It would force air backwards through your AFM at the same time it was forcing air through your engine.





Actually, I guess at some point it would actually force your AFM shut while still forcing air into your engine. Hmmm...Lots of air and very little fuel. I think we all know what happens then https://www.nopistons.com/forums/pub...O_DIR#>/11.gif