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Rosssub's Single Turbo Conversion.


Rosssub

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Using the OEM version 8 STI DP as a guide I finally cut up the new stainless single scroll 3" DP from back on page 18:

http://clubsub.org.nz/forum/showthread.php?43004-Rosssub-s-Single-Turbo-Conversion/page18

 

After cutting the SS head off I also cut a 75mm section from the tail end:

Downpipes_002.jpg

 

Then took the pieces into an exhaust shop and had the lower side of each cut flared for sleeve joins:

Downpipes_008.jpg

 

Then after fitting, adjusting and tacking in place. Then new 3" DP was welded together. Including $50 for welding the new version 8 STI DP came to a total of $485:

New_DP_03.jpg

 

New DP heat wrapped and a new version 5/6 STI O2 sensor fitted:

New_DP_finished_02_003.jpg

 

New DP installed:

New_DP_finished_02_016.jpg

 

I've had to extend the BH O2 sensor loom to reach the new V5/6 O2. The BH O2 plugs in near the battery:

New_DP_Finished_01_010.jpg

 

I exposed some wire, then cut the original O2 loom plug off:

New_DP_Finished_01_043.jpg

 

Then realised both O2 sensors use a slightly different plug. BE/BH left and V5/6 right:

New_DP_Finished_01_026.jpg

 

With a different plug pinout for both. Black signal wire and two white heater wires (polarity doesn't matter).

V5_V6_BE_BH_O2_plug_wiring.png

 

Using something sharp I pressed the locking tabs up:

New_DP_Finished_01_027.jpg

 

Then pulled the pins out and swapped plugs over:

New_DP_Finished_01_028.jpg

 

Using the BH O2 loom plug I cut off earlier, I started making a new loom extension:

New_DP_Finished_01_047.jpg

 

Ready to go:

New_DP_Finished_01_048.jpg

 

Extension plugged into the new V5/6 O2 sensor, then routed around to near the battery:

New_DP_finished_02_011.jpg

 

Then the other end soldered to the original BH O2 loom:

New_DP_finished_02_018.jpg

 

Insulated, then sheathed:

New_DP_finished_02_024.jpg

 

All taped up:

New_DP_finished_02_025.jpg

 

Then cable tied out of the way:

New_DP_finished_02_026.jpg

 

Washer bottle back in:

New_DP_finished_02_028.jpg

 

PTP Turbo blanket back on, also showing the new O2 wiring:

New_DP_finished_02_039.jpg

 

My BOV was starting to look a bit shabby so it got a quick coat of Aluminium engine enamel:

New_DP_finished_02_030.jpg

 

Then the TMIC went back in:

New_DP_finished_02_032.jpg

 

All done:

New_DP_finished_03_001.jpg

 

:)

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  • 3 years later...

Hi there 

I'm not sure why your images aren't loading on your post

Also I wanted to  know for the cop wiring do just swap the 2 wires at the ecu for it to work with the v6 wrx ECU 

Can you please  post pictures of the wiring at the ecu

Did you also use the legacy b4 loom?

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