Zax Bugeye "Shaggin' wagon" Build thread

[Rambo]

I meant Zach's assy.

Oh man, I didn't catch that one until just now.... clamf!

[pete25r]

Mikie do you know where Zach's assy has been?

Zach, forgot to show you at the meet but I made a switch to connect up the green and test connector things under the dash. I've got it long enough so I don't have to crawl under and dig for the wires, just reach down flip it, connect Tactrix, flashmode! I can make you one too, or any other bugeye knuckhead, if I can find a good switch. The one I used came out of an old comp power supply and when switched connects both connectors together but no cross talk.

[Rambo]

if I can find a good switch. The one I used came out of an old comp power supply and when switched connects both connectors together but no cross talk.

Yep, any double pole, single throw (DPST) switch will do:

[T0rque]

What about the test connector? You still need to crawl under for that don't you?

[Rambo]

What about the test connector? You still need to crawl under for that don't you?

Nope. A DPST switch would let you wire each of the green test mode leads, and then the test connector jumper into one switch but the circuits are still separate. Flipping the switch would be like connecting the green test plugs and inserting the connector jumper all with the flick of one switch.

You would buy a test mode jumper, clip the wire, then put this switch into that wire.

[T0rque]

Gotcha

[Jonney Knuckles]

Great read, any updates Zach?

[zax]

Ah, thought I read above somewhere that it was. Just wondering what track was over that way mostly.

FWIW when tracking I remove my ABS fuse and utilize threshold braking.

Ah! NOW I finally see Brandon's confusion! The Subaru has never been tracked. My above comment was with respect to the other cars that I've Auto-Xd in...

[zax]

Great read, any updates Zach?

None at the moment. My next step is to go back over the injectors to ensure that there are no leaks around the O-rings. After that I will be re-installing the stock airbox, installing the BPM TMIC, then beginning the OS tune. Currently, I am familiarizing myself with the Airboy spreadsheet. That will be instrumental in the success of my tune. Matty will as well

[zax]

Winter wheels are on the car as of today

[EJ257]

Winter wheels are on the car as of today

It's taken me some getting used to the winter tires, again. I lost 15mph on the Interstate off-ramp turn (the one I had my tire blowout on a few months ago)

[zax]

Because I've switched exclusively to the MBC (for now), I was able to bring down the boost to compensate for the lower pressure drop of the BPM TMIC (~0.8 PSI pressure drop for the BPM and ~3.0 PSI pressure drop for the STi TMIC). As such, I was able to install the BPM TMIC on my current pro-tune without having to adjust the timing. Here's why: Running the lower pressure drop means I can target 21.3 PSI at the compressor nipple rather than 23.5 PSI to achieve 20.5 PSI at the MAP sensor (post TMIC). This has the benefit of a lower intake charge since I am running well within the efficiency range of the turbo and the BPM has significantly better thermal exchange properties compared to my previous STi TMIC. Since lower charge temperature lends to a lower laminar flame velocity in the cylinder, the combustion pressure wave will impact the cylinder after TDC -- For Heide264, this means my spark advance is well after MBT. While I'm not making as much power this way until I tune the timing, I'm also not pressure spiking from igniting prior to MBT. The disadvantage is that I will run slightly higher EGTs due to the retarded timing compared to MBT, but I don't believe the increase in EGT will be high enough to cause any issues.

[pete25r]

Zax, I still think you need to upgrade some of your OEM compents, like your oil filler cap. You need a new shiny one so the underhood airflow can be maximized and create a tri-fecta of cooling.

..had to say something stupid just to balance out the good knowledge just laid down.

[Heide264]

Good to hear it is running well Zach. I am gonna double check a few books when I have some time. I still believe the added air mass due to the cooler air temps will impact flame speed more than the temperature change itself. Same idea though, more air means a higher "load" and hence less advance needed.

Brings up a good point though... Would your ignition be cut back anyhow due to your ecu seeing (slightly) higher load values than it would earlier for the same situation? Or does the ignition need cut at a given load anyhow. Something to consider I guess.

[zax]

Zax mah-man.

You wrapped up your turbo twice, blanket, steel, added a catch can..etc.

When you going to mod the battery? Looks like you are still rocking a factory battery. Shame, shame.. you need to step up your game.

*had to say something stupid. I dig the build. I like the heat retention/prevention strategy you have going on in the turbo area. I might have to copy-cat a little.

PETE! YOU GOT YOUR DAMN WISH!