2013 Subaru Impreza WRX STI - Project Log

[jedi_sol]

Originally Posted by UltArc

Looking good! I didn't think it would be long before you got back into it!

It's also nice to see another newer performance oriented vehicle. Have you setup your kill switch yet? That may not show you as great of gains as it did me, 2.5 idling isn't as bad as 3.7. It's nice Subaru has real underbody panels, even if they aren't what you exactly want- it at least gives a nice platform to build off. Glad you got started, and I look forward to following.

Thanks!

No kill switch yet because im still researching how to go about it (trying to lookup wiring schematics). Like youre car, i also bought an extended warranty so i want something that is easily reversible if i have to take it in for service.

This is my first new OBDII car, how did you go doing your kill switch? ( i read through your killswitch thread...but i didnt see how you installed your kill switch and what wires/fuses you tapped into).

[UltArc]

Originally Posted by jedi_sol

Thanks!

No kill switch yet because im still researching how to go about it (trying to lookup wiring schematics). Like youre car, i also bought an extended warranty so i want something that is easily reversible if i have to take it in for service.

This is my first new OBDII car, how did you go doing your kill switch? ( i read through your killswitch thread...but i didnt see how you installed your kill switch and what wires/fuses you tapped into).

As soon as I got it working, I was pretty much done with the thread...that's pretty lame on my part, I will put that on my to do list to put the final details in.

I went by trial and error on a few, what actually worked for me was my fuel pump fuse. I took those little clips that get attached to wires, it's like a Y shape (electrical illiterate), broke off one piece, and plugged it in. Ran the wire from the fuse box inside, then through some PVC piping, then the switch, and back though to the other end.

With the warranty, I am not messing with any tunes- everyone who drives like a maniac (teen mpg in the same car ), easily see 2+ mpg while seeing the performance boost and abusing it. Like my other mods, the kill switch can easily be removed. I even keep the original fuse in the glove box, with the box of fuses I bought, in case something goes wrong.

[UltArc]

[UltArc]

Sweet! It worked!

Heres the full setup:

How it looks closed up



Fuse Panel - Note I used an extra extender thing to give me more space/room to work



From Door Jam to Fuse Box


Door Jam, since firewall opening is on drivers side


What the floor looks like (PVC underneath)


Kill Switch

[jedi_sol]

Originally Posted by Awd180

good luck with your modding, and no matter how much you mod once you hit boost your mpg's go down.

I have to treat boost like candy....only once in a while, but not too much

[AbeisAverage]

Awesome car man, I have been window shopping the regular wrx. Along with the mazdaspeed 3 and the ford focus st. My first car was turbocharged and now I think I have the bug, my current car feels so dull although I can't complain because I am getting way better mpg and the reliability is off the charts. What you've done looks great and the car has to be exciting.

Out of curiosity what are your rpms at 60 in 6th? Have you experimented with changing up the sti drive stuff?

[jedi_sol]

Originally Posted by AbeisAverage

Awesome car man, I have been window shopping the regular wrx. Along with the mazdaspeed 3 and the ford focus st. My first car was turbocharged and now I think I have the bug, my current car feels so dull although I can't complain because I am getting way better mpg and the reliability is off the charts. What you've done looks great and the car has to be exciting.

Out of curiosity what are your rpms at 60 in 6th? Have you experimented with changing up the sti drive stuff?

60mph in 6th gear is around 2300rpm

Ever since i got the torque app, i played around the 3 different modes to see what affect they have on MPG. Driving on a flat freeway, foot steady, i would turn the knob to the 3 different modes:

Intelligent mode - eco mode gets the highest mpg.
Sport mode - mpg instantly drops by 3mpg vs "I" mode
Sport # mode - mpg drops by 5mpg vs "I" mode

[AbeisAverage]

I totally forgot the intelligent mode was essentially an eco driving mode. I was also going to ask if you're putting premium in and if you're willing to see difference octane ratings have with the car?

[Awd180]

Originally Posted by AbeisAverage

I totally forgot the intelligent mode was essentially an eco driving mode. I was also going to ask if you're putting premium in and if you're willing to see difference octane ratings have with the car?

The problem with using lower octanes is engine knock, a retune or engine map could account for it but it's not recommended with forced induction. The higher the octane the more it resists detonation. Basically without tuning for the lower octane mpgs would be worse, or cause more damage in the long run even with a tune/map. It is debatable, but dozen have burnt out cylinders from lower octane or the wrong a/f ratio in these and other high performance engines.

[AbeisAverage]

The car is new, it should be more than capable of handling lower octane fuels. It is just up to the discretion of the owner. People keep saying it will net lower mpg number I am just curious as to how much of a difference it would make.