2.5t with Map 2 JB4 Dragy results

[Volfy]

Here you can see how rusted the pins were. Even the wire's copper strands were corroded badly. The green residue on black connector is copper oxide, which is what makes Statue of Liberty the same color. I tried to spray it with contact cleaner, which help for a while, but soon after the pins would not make good contact again, and the ECU would get bad boost pressure signal and go into fail-safe mode... very annoying.

Changing to brand new pins (on left) fixed it.

 

[Dan00Hawk]

^Good info.

 

[antoneloc]

FWIW, I've been running this same JB4 on my 2.5T and have been quite happy with it. That said, those white 3D-printed connector "shells" leave a bit to be desired, as they are not at all water tight. I bought my JB4 used and it came with one of the connectors corroded. Looked like water got into the connector and the copper pins just rusted out. I checked with BMS and was told they now have the correct OEM type connectors on newer production JB4 for the Smartstream engines. They can sell me the new connectors and price wasn't too outrageous, but I would have to send my wiring harness in to get the new connectors retrofitted. That was just a bit too much hassle IMO, so I ended up finding the correct replacement pins and just changed them out myself. Have worked perfectly since.

What I did to keep moisture ingress from corroding the pins again was to wrap the white connectors with electrical mastic tape. Both 3M and Scotch make some good ones. The tape sticks to itself, so wrapping over the white connectors forms a water-proof seal.
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What was the quoted price from BMS if you don't mind me asking?

 

[Volfy]

What was the quoted price from BMS if you don't mind me asking?

Don't mind at all. BMS quoted me $40-50 per connector, if I wanted to do just one. Or... $150 for retrofitting the whole harness. Either case, I would've needed to send in my existing harness (with the white connector shells) to BMS.