Yesterday I checked my air filter and found that a mouse had started chewing it. No gaping hole, but getting there. I realized that the factory air box is nothing more than a nice "mouse motel" and decided that it was time for a BHAF as they are covered with steel mesh and not so easy to eat through.I did a search and didn't find too much regarding how to mount this thing so I thought of making a steel bracket from 1.5" x 10" steel strap 1/16" thick, [see last photo]. I drilled a 5/16" hole in the end of the air filter and put a bolt with a large flat washer through from the inside and bolted the bracket to it using thread locker and two nuts so the bolt couldn't come loose (and go through the turbo). The bolt fits the hole very tight so I don't have to worry if it did happen to come loose. As you can see I used some RTV silicone to cover the nuts and prevent corrosion. I then drilled a 11/16" hole for the air filter monitor and installed it. I attached it to the fender with a exhisting 13mm fender bolt. I made that side of the bracket with slot instead of a hole, so that when I want to remove the air filter all I have to do is loosen the 13mm bolt and the pipe clamp on the other end, and lift it out.The filter sits about 3/4" below the hood, and has several inches of clearance under and around it. I did think of making a heat sheild, however, after talking to Mopar1973man decided not to. Mike says that they aren't necessary so I thought I would try it this way without one.The filter is a NAPA #6637 and was about $62 total.Any input pro or con is welcome. Always trying to build a better mouse trap (pardon the pun).Bob

no it is not. i had just kicked in and i was pulling a 6% or 7% grade foot to the floor running as hard as i could. only stayed there for 20 or 30 seconds and came right back down to 190 or 195. with all the crazy temp swings i have been seeing(mostly low) it was exxiting. since the trip the tstat has been workin fairly normal. no more 150 to 165. its now holding 180 to 190. question is for how long. maybe working it that hard over the mountain did something to it.hard to miss the turbo prop when comes on no matter how hard your are pushing it.

I installed the NAPA 2790 and it keeps "slipping" out of the clamp

i lifted mine today(bahf)and it popped off of the tube. lifted it pretty high. i have never noticed that it has slipped at all. i usually just take it off the turbo, tube and all and it has never slipped apart. kind of suprised me. but the seal appeared to be very good. it would be nice to have it clamp together better though. gonna have to think about that one.

I noticed that problem with the filter slipping off the turbo tube when I installed it. I took some 36 grit sandpaper and sanded around the opening so the tube would have some grab. Then I cleaned both mating surfaces with brake cleaner on a rag. I lifted up and pulled on it and it didn't give a bit.

sounds like a pretty good idea. but did you use 36grit or 360 grit? 36 would be a large abbrasive.

It was 36 grit. I wanted a deep heavy cut so the rubber would have something to hold onto. I held the filter upside down so any abrasive that may have become dislodged while sanding would fall to the ground and not into the filter. It didn't take too much just a couple of rounds with the paper.

Hell, I used to grind steel with 36 grit disc sander. Keep a Light touch!

I used it by hand and was careful as an air filter is not the place to go nuts with sandpaper! Like I said, it won't come off. I guess one could take a file and cut a few grooves around the neck and get the same effect. I have all grits from 36 to 2000 on hand and thought 36 would do the best job.

saa long as you dont get them so deep that air can find a way in.russ, 36grit and steel i have done, 36 grit and rubber( or what ever it is made of)i have not done.

36 grit is used on plasitc. The paper I used was intended for plastic body repair. The idea is to rough it not grind it off.

The idea is to rough it not grind it off.

Yup!! Occasionally on a boat engine, I'd come across a rusted nut or bolt that HAD to be removed. I destroyed a lot of metric Craftsman sockets by hammering them onto the rust expanded nuts... occasionally got to the next SAE size. If all else failed, grind it off, remove the part, remove the bolt, reinstall the part with new hardware. I went through a lot of stainless steel replacement nuts & Never Sieze. #36 disc with a hard rubber backer on a disc grinder. I still own the grinder & think it still has #36 grit mounted on it!

Hi all,Just wondering if a BHAF would fit directly on the Turbo. If so, what #? I put on a fiberglass shaker style hood, like the kind that used to be on the 70 Hemi Cuda's, so it's open & a BHAF would be directly under all that fresh cool air!Thanks,Dave

I would have to measure it to see if it would fit directly over the turbo. The problem is there is not enough room in front of the turbo since the filter is near 11" long.

Hi all,

Just wondering if a BHAF would fit directly on the Turbo. If so, what #? I put on a fiberglass shaker style hood, like the kind that used to be on the 70 Hemi Cuda's, so it's open & a BHAF would be directly under all that fresh cool air!

Thanks,

Dave

...and rain water

Man I wouldn't want mine slipping off on a dusty road!! Do you guys think rtv or silicone would be a good idea? I mean you could peel off what you don't like. Or doesn't someone use a piece of pipe inside as a backup for gear clamps? Prolly 4inch sdr 35 pipe cause 4" abs or PVC would be to big. I bet that with a rough up would be ace tight.

I don't think mine has ever came loose. I don't think that 'falling off' would be an issue.. Oh, and for whoever asked, here's a pic I found while surfing for something completely different.. http://forum.mopar1973man.com/attachment.php?attachmentid=5223&d=1363919908

I don't think mine has ever came loose. I don't think that 'falling off' would be an issue.. Oh, and for whoever asked, here's a pic I found while surfing for something completely different.. http://forum.mopar1973man.com/attachment.php?attachmentid=5223&d=1363919908

Mine has never slipped off except when I was lifting it up. I had it at an extreme angle to the tube though. That appears to be a much shorter filter in the pic, but it does prove there is one out there that will fit. At least on a 12v any way. But it does not look like there is any more than on a 24v.

I wonder where I can get a filter like that one? Thanks for posting that cool pic. Nice 12V!

That doesnt look like a real BHAF to me. It kinda looks like one of the k+n filters or something like that. Never heard of a BHAF that small.

Theres also a battery missing on that 12 valve I dont think you could ever get a large filter to bolt up without jamming it in the altenator maybe a smaller one like in the picture but I bet that small of a filter will probably be pretty close in cfm to a stock unit