IM spacers, questions

A6 All/ S6 All
#1

I am looking at the IM spacers from JHM and reading a lot of comments praising them, but before I push ‘buy’ I was wondering.

  1. Did any one measure the surface temperature on the IM before and after?
  2. What about the air temperature inside the IM, before and after?
  3. Why 8mm thickness, was this perhaps the best balance between price and performance, or just what the space allowed?
  4. On a lot of different forums for different cars, some go the diy way, anyone tried this with the V10’s?
#2

I did measure the temps. It was a drastic drop. I had my car with spacers and another car without spacers. So we had real time comparison.

I don’t remember the exact temps but the smallest I saw was 40deg F and the most I saw was almost 89deg. They seriously work.

We have logs from before and after. So you don’t just see the intake temps looking better but you can measure the knock voltages and see there really is an impact.

The 8mm is big enough to achieve the needed results. Bigger isn’t going to most likely yield more. When you take into effect the fact that the hard fuel lines only have so much play in them. So that comes into play.

The other things we see is how the cooler air charge helps reduce the carbon impact. The fact that the cooler temps cut down on the mist also help performance. Cutting down on the under hood temps also helps other components like hoses and other supporting plastic parts.

We have a good pool of results from The 5.2 to all of the 4.2 cars and then the domestic guys that run something similar.

As for the DIY. The material is toxic. sorcing that stuff then cutting it and trying to get it to fit would just be a big nightmare. For the cost the DIY would not be IMO a smart way to go. The spacers have a special taper to them.

My opinion. They are one of the top mods for the overly hot 5.2.

#3

Great product, as Justincredible states they drastically reduce the intake temps.

My only complaint was on the bolts supplied. They did not seem very great and I stripped them tightening them to torque specs (which isn’t much but I don’t recall off hand). I replaced them all with new bolts and have been happy.

#4

Thanks for that great reply Justin, much appreciated!

That’s the ting, importing them to Denmark the IM spacers would end up costing close to 500$ With shipping, handling, import and taxes. :neutral_face:

Initially to 8nm and afterwards to 9nm and 90deg according to Audi. :slightly_smiling_face:

#5

When you look at overall what the spacers do. I think 500 is a lot but I would still consider doing it. If your going to get the spacers shipped it would be a good idea to get the JHM cable for the TCU as well. That is a seriously fun mod. I think if you don’t have a tune with JHM they can make the TCU and ECU work on the same cable.