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Schrubbe8210
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Last seen: 10 months 1 week ago
Joined: 12/19/2017 - 20:41
Place to hide the infinity

So I have the infinity wired up to my 2001 a4. Everything checked out, and it started up with the base map on the first try. The problem I have is I have nowhere to go with it. Does anyone know of an extension cable for the infinity connector? Does AEM make one, or Molex? Also, if i strip the outer layer of the 30-3903 adapter harness off to make it more flexible is that a bad thing? Out of all the stuff I thought I would have to deal with, I didnt think finding a place for the ecu would be this big of a pain. Other than that its great!

 

Thanks!

AEM_NS
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Last seen: 1 year 2 months ago
Joined: 06/06/2014 - 09:31
Isn't it pretty well hidden

Isn't it pretty well hidden under the rain tray?

Schrubbe8210
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Last seen: 10 months 1 week ago
Joined: 12/19/2017 - 20:41
I can stuff it under there,

I can stuff it under there, but my car is a dedicated track car and has no rain tray. Also, I would effectively be velcro-ing it to some metal, and then cutting a hole in the factory ecu box to run the PnP harness out, which may allows a water intrusion point, in the event that the car sees rain. It would be infinitely easier to move the ecu inside the passenger area, but the harness does not allow. 

Thanks, Ted

 

AEM_NS
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Last seen: 1 year 2 months ago
Joined: 06/06/2014 - 09:31
Just watched this video:

Just watched this video: https://www.youtube.com/watch?v=FJayW9lIcFQ

Seems the ECU lives in a slightly different spot in a TT than in a MKIV VW which is what the 3903 was designed for.  Our VW didn't have an "ECU box" and I didn't see one in that video so I'm not quite sure what that is.  In a VW car, the Infinity sits under the rain tray right next to the cabin air filter housing and fits perfectly.  I'm not sure running without a rain tray is a good idea if your car is a dedicated track car or not since this could allow even the stock ECU and wiring to get wet.  From what I've seen on the VW's, it seems the stock wiring harness is probably long enough to be relocated into the drivers comparment if you made a big enough hole and sealed it with a firewall grommet.  I certainly don't suggest modifying your adapter harness.  You risk damaging it and it will certainly void the warranty.  If you don't mind those risks, then go for it. 

Schrubbe8210
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Last seen: 10 months 1 week ago
Joined: 12/19/2017 - 20:41
OK. the tt is a little

OK. the tt is a little different still. See this video https://www.youtube.com/watch?v=GCh4bAT7wjE. it shows what I am dealing with. I never drive the car in the rain, and it stays in a garage when not driven, the only time it sees water is the unlikely event of some rain the night before a track day when it is on the trailer and sitting outside for the night. I spoke to Hunter about this yesterday, and he told me to leave the harness alone, and basicall cut a hole inthe back of my ecu box and nestle the infinity behind it with the adapter harness going through the hole in the box. it worked rather well, i am going to find some material to stuff around the hole to keep it as watertight as possible, but based on the location and the hole being in the back, water intrusion should be minimal. Thoughts? It seems to work well thus far. My other concern was actually bolting the infinity down somewhere, but he told me that really wasn't necessary, just maybe some double stick tape to hold it in place.

AEM_NS
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Last seen: 1 year 2 months ago
Joined: 06/06/2014 - 09:31
Oh shoot sorry... you have an

Oh shoot sorry... you have an A4! I thought you had a TT for some reason. My apologies. Yeah, the 3903 is definitely not going to fit an A4 very well. I had spent some time thinking of a decent mounting setup on an A4 and my only thought was making a different adapter harness and putting the ECU where the battery lives but that'd require a battery relocation. Honestly, anything you can come up with to get the Infinity to work is going to be your best and only option. Sorry for the mix up but the 3903 was really built for A chassis cars. B chassis cars are just so different.