Performance worsen after installing aftermarket air filter

[Izso]

ur rocker cover inside will contaminated by dust/dirt also if ur engine breather system still stock connected to air box.
thus ur engine oil will contaminated because of the oil recirculating/flow from head back to oil pan.

Ah.. I thought of that sometime ago. Breather connected to a mini filter, PCV connected to OCT so there isn't any circulation?

Anyway, we're going off topic already.

In highly basic terms - For a car to have power it must have :

1. Air (oxygen)
2. Spark
3. Fuel
4. Complete combustion
5. Good scavenging from exhaust

If any one of these items change the others must change as well to accomodate the increase in #1 (from the air filter). If everything else stays the same you'll just run lean (possibly) or just get poorer combustion. So if your ECU is not adaptive it will not register the extra air until some adjustment is made in the fueling correct?

Does anyone know what sort of ECU is the Viva using?

 

[papagoines]

err... need OCT aaa? mine didn't connect to anything since convert to open pod + custom pipe...

just let the pcv hose pointing downward je

Ah.. I thought of that sometime ago. Breather connected to a mini filter, PCV connected to OCT so there isn't any circulation?

Anyway, we're going off topic already.

In highly basic terms - For a car to have power it must have :

1. Air (oxygen)
2. Spark
3. Fuel
4. Complete combustion
5. Good scavenging from exhaust

If any one of these items change the others must change as well to accomodate the increase in #1 (from the air filter). If everything else stays the same you'll just run lean (possibly) or just get poorer combustion. So if your ECU is not adaptive it will not register the extra air until some adjustment is made in the fueling correct?

Does anyone know what sort of ECU is the Viva using?

 

[Maxx]

Ah.. I thought of that sometime ago. Breather connected to a mini filter, PCV connected to OCT so there isn't any circulation?

Anyway, we're going off topic already.

In highly basic terms - For a car to have power it must have :

1. Air (oxygen)
2. Spark
3. Fuel
4. Complete combustion
5. Good scavenging from exhaust

If any one of these items change the others must change as well to accomodate the increase in #1 (from the air filter). If everything else stays the same you'll just run lean (possibly) or just get poorer combustion. So if your ECU is not adaptive it will not register the extra air until some adjustment is made in the fueling correct?

Does anyone know what sort of ECU is the Viva using?

ur oct connected back to manifold? if yes then no problem.. gases/pressure will be sucked back into combustion.

---------- Post added at 07:00 PM ---------- 6 hour anti-bump limit - Previous post was at 06:58 PM ----------

err... need OCT aaa? mine didn't connect to anything since convert to open pod + custom pipe...

just let the pcv hose pointing downward je

the other port on rocker cover still connected to manifold? if yes then ur rocker cover inside/head will get dirty becoz unfiltered air sucked thru the open hose.

 

[papagoines]

the other port on rocker cover still connected to manifold? if yes then ur rocker cover inside/head will get dirty becoz unfiltered air sucked thru the open hose.

I believe your right

 

[Maxx]

I believe your right

i thought u wanna post opened head cover.. heehe

for turbo i opt for installing OCT between rocker n air filter pipe.

reason, when u boost, air sucked thru air filter pipe is more than manifold. (actually manifold already pressurize, there's a check valve between head n manifold hose to prevent boost flow to head n crank case, but allowing gases to sucked thru manifold below boost (vacuum))

for NA, OCT between head n manifold. vacuum in manifold will sucked gasses/blow-by thru the hose.

 

[papagoines]

Hahaha... just want to show my opened opened rocker port... when viewing it back, I forgot the one that have the check valve

maybe that's why daihatsu route the port thru the blow off valve so better to expel blow by gas? :hmmmm:

for turbo i opt for installing OCT between rocker n air filter pipe.

reason, when u boost, air sucked thru air filter pipe is more than manifold

 

[Maxx]

Hahaha... just want to show my opened opened rocker port... when viewing it back, I forgot the one that have the check valve

maybe that's why daihatsu route the port thru the blow off valve so better to expel blow by gas? :hmmmm:

haha..
maybe, blow by will be sucked back thru turbo.. then turbo dirtied by oily blow by..

 

[stupidcar]

POD Filters Mythbusted - YouTube

heyhey, mcm fan!