Category Archives: Alignment

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

How To: Setup your Street alignment the right way.

Street Alignments can be tricky.

No offense to alignment techs, but 90% go for the easy way out when it comes to setting up your alignment. Especially when you’re on an upgraded suspension.

For example,

It’s 1000x easier to adjust camber plates to get equal camber left and right, this is a big no no and will negatively effect the handling of the vehicle.

In short the easiest way to make sure your car gets setup the best way possible you can do the following, or make sure the alignment tech does your alignment as follows.

Continue reading How To: Setup your Street alignment the right way.