Keith’s E46 M3 build log.

[Keith_MN]

Turner airbox install & notes.

Got the full kit on the BF sale last year. Given recent reviews and the value proposition, I took a jump.

Get yourself a Lisle 30500 pliers or equivalent for the boot clamps.
I used the replacement boots with the OEM oetiker clamps. The boots are slightly bigger in diameter than the OEM boots, so the clamps will not engage to the second locked position without serious deformation. I left them clicked on the first lock and the intake feels very solid. We will see what happens with that, but it still feels better than worm drive garbage (which is what I used for the intake side clamps, turned out of view).

Struggled getting it seated for longer than I care to admit. Finally discovered that the very bottom of boot #5 was folding over and causing the problem.
Even fully seated now, the intake "angled" up enough to not fully engage both slots for the two 10mm nuts on the bottom. Not enough flex in the boots to bend it down. This also made the IACV connection extremely difficult to get seated. Another person pressing down on the intake would have helped.



Unlike some of the others, the airbox clears the driver side radiator shroud with no trimming. I have a fresh clip on the shroud keeping it snug against the radiator.





You can see my map sensor installed next to the brake booster. I decided to use the Auto3Design harness which makes the maf/map/iat all plug & play.

You can also see my dip stick below the mouth of the intake. I don't love the location but in the end the ease of functionality wins out. I used a conduit bender to get the dipstick tube lined up. Would definitely prefer to have a CSL style dipstick, seems like something that could be reproduced without too much trouble.

All back together with obligatory sticker tune. I have found that the front corner of the snorkel on #1 does touch the insulation of the hood, again another symptom of it angled up more than it should. It seems like it did settle downwards ever so slightly after some miles, enough that I took out 1 of the 3 washers stacked to get the strut tower bar to clear.

[bavarian3]

Looks good! Bummer to hear about these fitment issues. I personally removed the hood insulation. Not due to airbox fitment issues though.

What tune did you use?

[Keith_MN]

Looks good! Bummer to hear about these fitment issues. I personally removed the hood insulation. Not due to airbox fitment issues though.

What tune did you use?

Yeah it's not terrible, just sharing for future buyers. To be expected to some degree with aftermarket. I'm sure Karbonius is better but for this car I think I'd rather spend the $1k difference elsewhere.

Just the CSL tune for now. Goal was to get that loaded and if the car drove well (it does), live with that for the short term while I get all the details wrapped up. Will post my experience with that next...

[Slideways]

For the Turner box, you can loosen the single bolt holding the bracket under the intake manifold and it can be moved up to meet the two rubber mounts. That way, the rubber mounts won't be stressed and the intake won't be pulled down or bracket bent upward. For the ICV, you can pull out the 90 degree connector that clips under the airbox a few mm and secure it with a hose clamp. That will make it much easier to fully clip into the airbox. Best to not have tension on this stuff to avoid future issues.

[Keith_MN]

For the Turner box, you can loosen the single bolt holding the bracket under the intake manifold and it can be moved up to meet the two rubber mounts. That way, the rubber mounts won't be stressed and the intake won't be pulled down or bracket bent upward. For the ICV, you can pull out the 90 degree connector that clips under the airbox a few mm and secure it with a hose clamp. That will make it much easier to fully clip into the airbox. Best to not have tension on this stuff to avoid future issues.

Interesting. I had that bracket loose on install and didn't notice any slack in the fitment. Will investigate...

[Slideways]

Interesting. I had that bracket loose on install and didn't notice any slack in the fitment. Will investigate...

There should be some slack in it IIRC and you can access it with the unfiltered section removed and a long extension.

LMK if you need any clarification for the ICV hose/connector. Tension on that connector might cause it to break off the airbox.

[Keith_MN]

Got the car running and then life got busy again. Car was blocked in the garage for two weeks, just got it out on Monday night and broke 100 miles on it finally. Haven't thoroughly romped on it but getting deeper into the throttle. I can feel some flat spots but it's minor, runs well and sounds great. I have a few more minor items to troubleshoot/tweak and then will be looking into scheduling some dyno time. Found an Audi shop near me that may work out.

So anyways, sitll working on a tune/flash "diy" type post that I will put in this thread that should be another good reference for those looking.

I came across some pics the other day and mostly just wanted to post these of my old 540 from 2012.




And a random from today. Parked next to the E46 I have seen before at my son's doctor's office. Very faded rear decklid and failing headliner, but otherwise clean.