longislandwrx

[B]PART 2.[/B]


Air Pump

The 06 and up have an air pump that feeds air to the heads to improve emissions. the system is hideous and heavy at about 10lbs. The whole assembly and associated wiring can be removed. You'll have to remove some codes with your tuning software and purchase some block-off plates $30-$80. But the difference is huge.

ditch this:

[ATTACH=CONFIG]19583[/ATTACH]

for these

[ATTACH=CONFIG]19584[/ATTACH]

Coolant reservoir

The EJ has a coolant fill at the top of the motor since the turbo is higher than the radiator. However, being right on top of the motor it looks sloppy. On the 02-04s it's more prevalent than the 05+ but it still gets in the way on all models.
This is easily relocated to the firewall or other discrete location (as long as its higher than the turbo) If you replace your turbo with a non water cooled variant, you can remove this fill altogether (although this doesn't apply to most aftermarket turbos.) We'll have to see how the coolant routes on the 818 before finalizing the coolant routing. My thought is they will use this reservoir mounted high as a fill/burp for the coolant system.

relocated:

[ATTACH=CONFIG]19585[/ATTACH]


EGT Probe

Many WRXs came with a catted up-pipe. removing this cat is a great upgrade making both power and decreasing spool time. In order to keep tabs of this cat, Subaru installed an EGT probe in the uppipe to make sure the cat doesn't overheat. This probe is useless one the cat is removed but just removing it will cause you to throw a code. two options, use your tuning software to delete the codes or remove the probe from its wiring harness, and insert a 2.2 K Ohm resistor, available at any radio shack. There are only two pins in the plug, so just insert one end of the resistor into each lead of the plug. Wrap up the end with electrical tape to make sure your resistor doesn't fall out. You can also pull the wiring all the way back to the harness and save even more weight.

here's the dead weight
[ATTACH=CONFIG]19586[/ATTACH]

Thanks For Reading, Stay Tuned