Category Archives: Random Tech

Impreza WRX and WRX STI Power Steering System Parts and Fixes

Collection of Power Steering System Part #s and fixes for the Subaru Impreza WRX and WRX STI.

OEM Replacement Pieces
GR/GV WRX and WRX STI:
Return Hose: 34611AG210
Suction Hose: 34611AG220
Inlet O-Ring: 34439FG000

GD WRX and WRX STI:
Return Hose: 34611FE050
Suction Hose: 34611FE130
Inlet O-Ring: 34439FG000

There are some very nice aftermarket options to help assemble a custom suction hose. I’ll update this with more info later.

What’s in the box? ContourGPS!!


Do you do track days? Do you autox? Do you do cruises or car shows? Then you need to check out the Contour cameras. These cameras are awesome. There are multiple cameras available, I decided to opt for the ContourGPS. I ordered├é┬ámine with a few extras and recieved it within a few days. Check out what’s inside.

Continue reading What’s in the box? ContourGPS!!

Random Tech: STi Weight Distribution vs. Fuel Load

About a week ago I asked Dan to do some comparisons on the weight distribution of his Subaru Impreza WRX STi after he was corner balanced. Specifically regarding how a larger fuel load will effect the F/R bias. Sure a formula could’ve figured it out but some real world hard data is better.

Here’s the data Dan (CGMDan on IWSTI) collected.

Methodology car was weighed, without driver, starting at slightly less than 1/4 tank indicated. Once on the scales, the car was not moved or shaken. Fuel was added 2.5 gallons at a time and data was collected. Sways were not disconnected as I was only concerned about front to rear weight bias. I did record corner weights at 1/4 tank and again once full. Once full, I reverse calculated the fuel load at each measurement.

1/4 tank starting weights without driver

928.5 | 924.5
660.4 | 650.4 Cross weights were 50.1% LR to RF

Continue reading Random Tech: STi Weight Distribution vs. Fuel Load