42 CFM Air flow on air filter(enough?)

[trex92]

Originally posted by drexchan@Mar 8 2005, 13:27
yes, i totally agree on your statements about the e-supercharger and e-turbocharger.. i thing we share the same opinion on them... the energy consumption, battery drain, $$ (that's not worth), ....

but one thing: the flow-rate

See,
I believe that the e-supercharger is also running at constant RPM too. By why it works?

This is because the actual air flow is controlled by the TB opening, not the fan. No matter how fast the fan spins, how large the air mass it can generate (outside of the intake hose, stand alone), the actual air flow is controlled by the TB opening. During idling, the butterfly is almost closed. The idling speed is controlled by various mechanism and it's almost 100% self-regulating/close-loop. So, the flow is still the same eventhough the fan is spinning crazily. Agree?

Take this as example. Get a hair dryer, tuck it into a pipe and block the other end. Run the hair dryer (no heating, just blow, dun cook your hand), will you get a flow in the pipe? NO.. at the most the air will be pressurized a lil'.

phew... :D i thought we would have another heated debate here... hehehe... thank god that we agree...

Yeah, i guess what u say is true too about the butterfly closed. But if you put the fan just anywhere near the AFS (near the air filter) the pressure built up would only built up slowly as the intake hose is so long and huge (unless u put the fan just before the butterfly at the TB). In the meantime, the ECU would happily be injecting loads of petrol in until max pressure in the intake hose has been reached and the AFS reading is correct. Also in order to run this e-supercharger, you would need to use a strong fan right? A strong fan would built up very high pressure and the pressure built up to be very high until to the point that it would leak through the butterfly (as it is not really air tight) and how about ur idle speed motor (used for sucking air when the butterfly is totally closed)? There is a connection bypassing the butterfly thru to the idle speed motor and such as huge pressure built up would really screw up the idle speed motor.

Also another aspect coming from your hairdryer example. If u did close the blower side of the hairdryer and for long, the whole motor would blow.... unless u put in something like a BOV... hehehe.. cool idea, BOV for e-supercharger.... :D

But still, the whole concept of e-supercharger is do-able... is there any product like it on the market I wonder?

We just need to control the fan and make it variable according to the engine RPM. Perhaps rely on the firing signal from the spark plugs or even some sort of mechanical switch. Some thing like turbochargers using wastegates to control the boost.

 

[drexchan]

I think i have to agree on the idling thingy. But i still believe that, at other RPM range, there won't be a problem on the A/F ratio with the fan/e-supercharger. Unless the real SC/TC.. then a new mapping is required.

yes, there have been quite a lot of such similar products, which are actually the blower used in marine vessel, for the ventilation of the engine room and fuel storage.

Some are simply the blower + throttle switch + wiring. some comes with a vacuum switch, some comes with variable rpm controller... but the sad thing is, they are all made of plastics.

 

[trex92]

Originally posted by drexchan@Mar 8 2005, 14:07
I think i have to agree on the idling thingy. But i still believe that, at other RPM range, there won't be a problem on the A/F ratio with the fan/e-supercharger. Unless the real SC/TC.. then a new mapping is required.

yes, there have been quite a lot of such similar products, which are actually the blower used in marine vessel, for the ventilation of the engine room and fuel storage.

Some are simply the blower + throttle switch + wiring. some comes with a vacuum switch, some comes with variable rpm controller... but the sad thing is, they are all made of plastics.

:) nice discussion bro. I enjoyed it too.

You got MSN? PM me ur contact, so we can discuss further....

 

[drexchan]

let me guess, you are driving a pre-2001 wira/satria/SGTi? It has a different mechanism in the idling control and intake measurement. The newer batch of wira using siemens ECU is no longer using the MAF sensor and IAC gear. For idling, it's using a motorized TB to control the TB opening. For intake measurement, it uses MAP instead of MAF. It's more charger-friendly i would say..

BTW, UGPM..

 

[drexchan]

I was once thinking of buying the e-ram/e-supercharger and mod my intake to have 2 ports. One N.A., and another one F.I. using the e-ram.

You see, my car intake S-hose has another extension at the second bend just before the TB. This port is being sealed with a cap secured with a hose clamp, and can be utilized for the purpose.

My wild idea was to connect a hose on the port to the airbox, which will need to be holed at the resonator. The e-ram will be place at the middle of the hose.

When it's not activated, air goes into the TB via the stock S-hose. When activated (by any means), there'll be 2 intake paths. One, the stock hose, and the added hose (by-passing the S-hose).

But later-on dumped the idea after much though and revision on some physics law.. guess what?

 

[raymond]

guess what ? whats that ? tell tell.

by the way, my rav4 can just easily plug and play the e-ram. becoz there is something look like the e-ram on my air intake. i just remove that and plug that damn thing inside.. flow.. without blocking.


so.. wats logic.. haven get any yet..