MORE AIR FLOW TO JWT POP CHARGER
I chose to install the JWT Pop charger and Z-tube combination over the Cold Air Intake. I installed the MotorDyne 5/16 spacer at the same time.
In my haste to test these mods, I did not remove that plastic bottle located under the stock air box. It is bolted to the chassis with two 10mm bolts.
Refer to #8 in the G35 intake system diagram below.
For more detail check out the AEM Cold Air Intake instruction pdf.
Remove the driver side front tire.
Next remove the plastic clips that hold the fender well in place. Also remove a few screw & clips from the plastic cover underneath. Access the bolts with a 10mm ratchet and extension.
Notice the lower front bumper has plastic and foam components.
Remove the foam piece and plastic piece from the driver side lower bumper. There are a few clips that hold it in place.
There are two parts. Separate the two parts.
The plastic bumper piece will be modified.<O
</O
Use a rotary tool to cut out a rectangle about 3”x 4” from this piece.<O</O
Apply Velcro to the back of this part. Save that 3”x 4” rectangle you cut out and apply Velcro to it. If need be, you can stick it back on.
Replace the foam to this piece and put your G back together.
NOTE - Alternatively, the foam & plastic bumper pieces can simply be removed if you prefer not to cut anything. I choose to hollow a rectangle in the plastic piece because of the climate. When it rains here – it rains hard!
You’ll notice the difference immediately in the sound. It seems that bottle quiets the growl under the hood. You also get more air flow.
You can invest in a hydrophobic pre-filter that will prevent any water from entering your filter. Always better to play it safe. I got this one from Amsoil, item number EAPF15.
You can see the opening behind the bumper grill.
I chose to install the JWT Pop charger and Z-tube combination over the Cold Air Intake. I installed the MotorDyne 5/16 spacer at the same time.
In my haste to test these mods, I did not remove that plastic bottle located under the stock air box. It is bolted to the chassis with two 10mm bolts.
Refer to #8 in the G35 intake system diagram below.
For more detail check out the AEM Cold Air Intake instruction pdf.
Remove the driver side front tire.
Next remove the plastic clips that hold the fender well in place. Also remove a few screw & clips from the plastic cover underneath. Access the bolts with a 10mm ratchet and extension.
Notice the lower front bumper has plastic and foam components.
Remove the foam piece and plastic piece from the driver side lower bumper. There are a few clips that hold it in place.
There are two parts. Separate the two parts.
The plastic bumper piece will be modified.<O
</OUse a rotary tool to cut out a rectangle about 3”x 4” from this piece.<O
</OApply Velcro to the back of this part. Save that 3”x 4” rectangle you cut out and apply Velcro to it. If need be, you can stick it back on.
Replace the foam to this piece and put your G back together.
NOTE - Alternatively, the foam & plastic bumper pieces can simply be removed if you prefer not to cut anything. I choose to hollow a rectangle in the plastic piece because of the climate. When it rains here – it rains hard!
You’ll notice the difference immediately in the sound. It seems that bottle quiets the growl under the hood. You also get more air flow.
You can invest in a hydrophobic pre-filter that will prevent any water from entering your filter. Always better to play it safe. I got this one from Amsoil, item number EAPF15.
You can see the opening behind the bumper grill.
Registered User
You sir, did a great job and thanks for this write up.
Now, I'm a little confused here. Is that before and after cut/modification on second and third pictures?
Is there a way to take that bottle out without removing the wheel? I don't want to jack the car up...
Now, I'm a little confused here. Is that before and after cut/modification on second and third pictures?
Is there a way to take that bottle out without removing the wheel? I don't want to jack the car up...
Registered User
Nice idea, but it's not going to make a difference in power or airflow. You could verify this with an OBDII device monitoring the MAF values. If anything, the true result will be a dirtier engine bay.
The second pic is the foam and plastic pieces that fit together. The third pic is one of the bumper opening taken from under the hood. The fourth pic is one of the plastic piece after a rectangle has been cut out.
pull AEM Cold Air Intake install instructions off the web. You be able to see more without taking your G apart.
I have no way to test it. However, I got the idea from the AEM Cold Air Intake install instructions. In that setup the foam & plastic bumper pieces are removed because the is no air flow throught the bumper.
Registered User
In terms of more air flowing into the motor, it's not going to happen with that setup. The area surrounding the filter is large therefore the vacuum created by induction will be replaced immediately. There won't be any significant pressure differential whether you have this setup or the intended JWT setup. The only way to get more air into that engine via an intake is to have a true ram air style setup like the OEM intake tract. The OEM tract is placed in a high pressure area of the car which becomes slightly presssurized at speed which creates excellent throttle response, ideal flow across the MAF as well as ideal readings, and most importantly, it can generate a few hp above 60mph. You completely loose this effect when going with an open element filter like a POP, Stillen CAI, or "CAI". Additionally, pulling air from the lower portion of the bumper isn't a good place to draw from because it's a low pressure area.
Registered User
Quote:
that was my thoughtOriginally Posted by DaveB
In terms of more air flowing into the motor, it's not going to happen with that setup. The area surrounding the filter is large therefore the vacuum created by induction will be replaced immediately. There won't be any significant pressure differential whether you have this setup or the intended JWT setup. The only way to get more air into that engine via an intake is to have a true ram air style setup like the OEM intake tract. The OEM tract is placed in a high pressure area of the car which becomes slightly presssurized at speed which creates excellent throttle response, ideal flow across the MAF as well as ideal readings, and most importantly, it can generate a few hp above 60mph. You completely loose this effect when going with an open element filter like a POP, Stillen CAI, or "CAI". Additionally, pulling air from the lower portion of the bumper isn't a good place to draw from because it's a low pressure area.
Thanks for the reply DaveB. Consider air flow with an air diversion panel installed. It seems the only air flow is through the grill and that snorkel thing above the radiator into the JWT PC. Would air flow from the lower bumper help in that case. Could you test this?