JWT Pop Chargers + Post MAF Tubes and Bumper Cut Outs

synolimit · 10-10-2013, 06:15 PM

Running a setup like this recked havoc on my subi for DD. I wouldn't do it. That better direct flow you speak of will kill the MAF readings. Think about it...at 10,20,30,60 mph etc in closed loop throttle the MAF thinks it will see x.xx volts. But a gust of wind blows into the system and spikes the volts and your foot isn't pressing on the throttle hard enough, the system thinks you are pushing harder and adds fuel because of the increased air the MAF saw. The car drives like **** and sputters and hiccups. You can test it by running the car in the driveway and blowing air into the setup from outside the bumper with a air compressor. Needless to say I had to block off the inlet in the bumper.

I wouldn't go SRI unless you vent the hood and bumper inlets need to be off to the sides of the filters unless you have a CAI setup like me or stillen.

IGoFast1589 · 10-11-2013, 08:40 AM

Quote:

Originally Posted by synolimit

Running a setup like this recked havoc on my subi for DD. I wouldn't do it. That better direct flow you speak of will kill the MAF readings. Think about it...at 10,20,30,60 mph etc in closed loop throttle the MAF thinks it will see x.xx volts. But a gust of wind blows into the system and spikes the volts and your foot isn't pressing on the throttle hard enough, the system thinks you are pushing harder and adds fuel because of the increased air the MAF saw. The car drives like **** and sputters and hiccups. You can test it by running the car in the driveway and blowing air into the setup from outside the bumper with a air compressor. Needless to say I had to block off the inlet in the bumper.

I wouldn't go SRI unless you vent the hood and bumper inlets need to be off to the sides of the filters unless you have a CAI setup like me or stillen.

Ah yes... For sure. I can see where you're going with that. Did you have an APS intake or something of the sort for a WRX or STi and run a hose directly to it? I had a few Subarus as well.

Once the ECU went into closed loop fueling though it should be alright though I imagine, no? Because then it will be fueling based on the 02 sensor readings and not from the MAF. I wonder if having the car calibrated by a tuner could rectify any of the issues you had and optimize the setup. I could be wrong, but I thought the ECU switches from open to closed loop after a certain amount of the time, the 02 sensors reach a certain temperature and coolant is up to temperature. I wish I was more knowledgeable about tuning and electrical components.

synolimit · 10-11-2013, 10:24 AM

Quote:

Originally Posted by IGoFast1589

Ah yes... For sure. I can see where you're going with that. Did you have an APS intake or something of the sort for a WRX or STi and run a hose directly to it? I had a few Subarus as well.

Once the ECU went into closed loop fueling though it should be alright though I imagine, no? Because then it will be fueling based on the 02 sensor readings and not from the MAF. I wonder if having the car calibrated by a tuner could rectify any of the issues you had and optimize the setup. I could be wrong, but I thought the ECU switches from open to closed loop after a certain amount of the time, the 02 sensors reach a certain temperature and coolant is up to temperature. I wish I was more knowledgeable about tuning and electrical components.

I made everything. The filter was right behind the fake more front inlet in the 11+ bumper. I cutout the fake vent to give it a real vent. It was 3" from the filter to the turbo inlet with pipe I made.

You mean open loop? Open was fine, 335hp 400tq to the ground on stock everything but bolt ons. Closed loop ran like **** with every gust of wind. The subi tables all work off MAF and load. The O2's are useless because neither are wide band.

sixpax · 10-11-2013, 01:21 PM

Quote:

Originally Posted by synolimit

Running a setup like this recked havoc on my subi for DD. I wouldn't do it. That better direct flow you speak of will kill the MAF readings. Think about it...at 10,20,30,60 mph etc in closed loop throttle the MAF thinks it will see x.xx volts. But a gust of wind blows into the system and spikes the volts and your foot isn't pressing on the throttle hard enough, the system thinks you are pushing harder and adds fuel because of the increased air the MAF saw. The car drives like **** and sputters and hiccups. You can test it by running the car in the driveway and blowing air into the setup from outside the bumper with a air compressor. Needless to say I had to block off the inlet in the bumper.

I wouldn't go SRI unless you vent the hood and bumper inlets need to be off to the sides of the filters unless you have a CAI setup like me or stillen.

Great points, though I never owned a Subi I have no clue what all that techno speak means, beyond that it makes sense.

I must be lucky or driving to slow ... though 125-130 is pretty fast at the end of the main straight at Summit Point ... but have had no issues with the car behaving any differently. The only thing I don't like is the incredible amount of dust that now gets sucked up into the engine bay, which on the one side is good because I know colder air is getting in there, but sucks to keep clean.

Anyway, from a performance standpoint I have noticed none of the things you mention the Subi did.

synolimit · 10-12-2013, 02:14 AM

Quote:

Originally Posted by sixpax

Great points, though I never owned a Subi I have no clue what all that techno speak means, beyond that it makes sense.

I must be lucky or driving to slow ... though 125-130 is pretty fast at the end of the main straight at Summit Point ... but have had no issues with the car behaving any differently. The only thing I don't like is the incredible amount of dust that now gets sucked up into the engine bay, which on the one side is good because I know colder air is getting in there, but sucks to keep clean.

Anyway, from a performance standpoint I have noticed none of the things you mention the Subi did.

Can I see pics?

Lol 125-130 is cute. Just joking. My 600cc SS does 165 on the straight there. 160 if I gear up. Almost had a nice high side in turn 2 last time

o and almost died from 40-50 mph winds blowing my tent and me around for like 8 straight hours.

sixpax · 10-12-2013, 06:08 AM

Quote:

Originally Posted by synolimit

Can I see pics?

Lol 125-130 is cute. Just joking. My 600cc SS does 165 on the straight there. 160 if I gear up. Almost had a nice high side in turn 2 last time

o and almost died from 40-50 mph winds blowing my tent and me around for like 8 straight hours.

The OP was wondering about bringing air into the filter of a short CAI ... I have a Typhoon and bring the air up to feed into the stock location inside the engine bay ... which blows in slightly underneath the filters

There is DIY to do this and it uses the front fascia inserts ... I had them there at first but when I put the Stillen Brake Cooling Kit on had to relocate those hoses.

Only downside I have experienced is the amount of dirt and **** that gets sucked into the engine bay ...

luigi90210 · 10-17-2013, 01:27 PM

Quote:

Originally Posted by sixpax

The OP was wondering about bringing air into the filter of a short CAI ... I have a Typhoon and bring the air up to feed into the stock location inside the engine bay ... which blows in slightly underneath the filters

There is DIY to do this and it uses the front fascia inserts ... I had them there at first but when I put the Stillen Brake Cooling Kit on had to relocate those hoses.

( Click to show/hide )

Sorry OP for derailing your thread, Sixpax, where did you get this intake manifold? I want it but i cant find it on Kinetix's website
it looks like the HKS manifold

10-10-2013, 06:15 PM	#1 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3389	Running a setup like this recked havoc on my subi for DD. I wouldn't do it. That better direct flow you speak of will kill the MAF readings. Think about it...at 10,20,30,60 mph etc in closed loop throttle the MAF thinks it will see x.xx volts. But a gust of wind blows into the system and spikes the volts and your foot isn't pressing on the throttle hard enough, the system thinks you are pushing harder and adds fuel because of the increased air the MAF saw. The car drives like **** and sputters and hiccups. You can test it by running the car in the driveway and blowing air into the setup from outside the bumper with a air compressor. Needless to say I had to block off the inlet in the bumper. I wouldn't go SRI unless you vent the hood and bumper inlets need to be off to the sides of the filters unless you have a CAI setup like me or stillen. __________________ 13 370z-

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