17 September 2017

Firewall Passthroughs

With the engine delivery nearing, I need to stop messing around and get my firewall ready! My punch list has a bunch of open things on it to include:

  • Lavashield heat barrier
  • Oil Cooler bracket
  • Control Cable pass-throughs
  • Power Cable pass-through
  • Universal Pass-through
  • Engine mount


I was able to knock off two of those things today, I started with the power cable passthrough. I purchased a firewall pass-through from summit racing a couple months ago and it was finally time to install it.



I used the stock location, but if I were to do this again I would use the factory hole, but push the location up and to the pilots right a bit. There is a doubler in this location, and while I was able to avoid running into it, I will have to fab a washer for the interior so the nut it sits flush. I drilled this to about 3/4 of an inch, then pulled out a carbide burr to take care of the rest. Yes, those are straight sides as that is the anti-rotation design from the pass-through.



I was also able to take care of my cable control pass throughs. Like the power connector, I purchased some eyeball passthroughs a couple of months ago. In all honesty, I have been putting off installing them because I was not sure how I wanted to lay them out. I finally decided to just put them in because it would be a complete pain to do this later.



There are three holes by default. I split the difference on the two left holes and these holes disappeared after I drilled the 1 1/8 hole for the eyeball.



That left the right hole off center but complete within the second eyeball cutout.





I placed the holes such that the backing plates were sided by side and touching. This was the decision point on where to put the third eyeball. I really wanted to put it to the right of the other two so that they were all on the same plane. If I were to do it again, I would probably do it that way. It looks like the control cables will all three line up nicely if you were to put them in the standard same plane configuration like the default setup. However, I was worried there there was some interference from something I needed to install in the future because every photo I have seen of an RV-10 firewall everyone seems to avoid the right mid part of this box...?



Yes, these plates are on backwards right now. These are not installed, I was just trying to find where to put the third passthrough. I ultimately decided on putting it lower than the previous two. It seemed to fit nicely in there. I guess I will find out when I go to install my control cables if this was a good idea or not ;) Hopefully I will remember to come back and update this post when I get that far.







I wanted to keep this paper in my files, but I was too lazy to walk it inside, and too impatient to have it just laying around. So I will archive it here for later.