When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
There's a very good chance you're overthinking this.
My bracket is a piece of steel, probably 2" wide, maybe 1/8-3/16" thick, I don't remember. Heck, it looks like I actually used this piece for some TIG practice at one point.
There are four holes in it.
The depth of the sensor is set by the washer stack.
The nut for the sensor isn't even welded on!
You can do this with some steel from Home Depot, a grinder with a cut-off wheel, a drill with a slow setting, a pilot drill bit, and a step drill bit.
3D printed template is pretty damn cool. So those are ABS front spindles? I had picked up some non-ABS ones that has that area blank. Haven't even started to put things together though to see how I can measure and drill holes for the sensor.
Yeah, I don't know much about this stuff but it worked for me. Sketched out the stock abs sensor, test fit to make sure it lined up. Same for the BMW sensor. Overlaid the two, nub is a tight fit into the sensor hole, tight fit hole into the other side for the stock bolt, a hole through the entire thing for a center punch.
Clamp it on, back the stock bolt out to flush as marked, center punch, drill pilot hole, remove template, drill final hole.
Anyway, yeah, this is a stock 04 MSM hub. Figuring out how to locate on non-ABS hubs seems beyond my skills, haha.
Figuring out how to locate on non-ABS hubs seems beyond my skills, haha.
I suspect the circumfrential location isn't all that critical, and measuring the necessary radius isn't too hard. Take the upright off, mark a circle at the right radius, eyeball a spot on that circle to drill the main hole. After that use the 3d-printed jig to drill the bolt hole.
Figuring out how to mount the upright in a drill press seems like it's probably the hardest bit.
Well, the main hole placement is somewhat important because both ABS sensors are the same circumference, but the sensor pickup on the BMW sensors are offset from center and located by four tangs that expand towards the edge of the overall circumference as you move away from the pickup.
Both sensors also have the same pickup angle, which is parallel to a line drawn through the center of the mounting hole, just with different offsets from the center of the sensor, which is why the jig works for stock ABS knuckles.
edit: I guess it wouldn't be that bad if you figured out how much the BMW sensor was offset from centerline and made a quick little jig that toothed into the abs ring
First time attempting brake lines / flaring has been interesting, to say the least.
I will probably end up redoing them all in the near future, but anyway, it made sense to me to keep the stock rear brake line and tee to use for the right rear since it is well anchored. The crossover Left Rear line that goes out the top of the tee is easily bent to point forward and anchored. Finding a M10x1 plug for the stock tee was somewhat annoying since Brakequp makes one (BQ502) but doesn't sell it on their site.
I’m chasing leaks at the Brakequip T-fitting and I’m out of ideas. I’m confident I have everything right, but it still leaks. I’m using 3/16 brake tubing, with 10x1 thread 3/16 inverted flare fittings. I’m using a Titan 3/16 double flaring tool and the flares look great. I’ve used the tool to create 20+ other flares on the car with no leaks. Yet, when I pressure bleed the system at 5 psi, I get leaks through the ID of the fittings. I’ve tightened the fitting to the point when any more and the threads will strip. What am I missing?
I’m chasing leaks at the Brakequip T-fitting and I’m out of ideas. I’m confident I have everything right, but it still leaks. I’m using 3/16 brake tubing, with 10x1 thread 3/16 inverted flare fittings. I’m using a Titan 3/16 double flaring tool and the flares look great. I’ve used the tool to create 20+ other flares on the car with no leaks. Yet, when I pressure bleed the system at 5 psi, I get leaks through the ID of the fittings. I’ve tightened the fitting to the point when any more and the threads will strip. What am I missing?
Is this on one or both of the T fittings? If it’s just one, maybe a bad T.
Is it the camera playing tricks, or is that a weird non-oem fitting you've got there? It looks oddly sized and shaped to me.
I wrapped up my install today, just need to do some tidying.
For wiring I ended up buying a Painless 70213 and put two 20a fuses in it. One each to the ABS 20a wires.
For the smaller 5a power wire and for the 3a painless trigger wire I reused my old ABS switch wire that is blue with a white stripe and 10a from factory.
Wired up a small LED for the ABS sensor failure and I noticed that triggering bleed in INPA also illuminates it.
For the brake trigger, which is ground normally and open when the brake is depressed I bought a BMW salmon relay with pigtail off eBay $5. It is wired as such: 30 - Ground (just connect it to the 85 wire) 87a - Output to ABS module 85 - Ground 86 - Brake trigger (green wire)
Pic from earlier today before everything was plugged in. Mounted the painless to an aluminum strip and 3d printed a little bracket for the salmon relay to mount it to the aluminum. Reused two OEM studs.
edit: And for anyone reading this later, I had to slightly sand the prongs of the front ABS sensors to get the proper clearance.
I've got kind of a soft pedal. Can someone explain how the bleeding through INPA is supposed to work, maybe I'm doing it wrong.
1. Press button to bleed
2. Press pedal like 80%
3. Open bleeder
4. ABS light comes on, ABS pump cycles loud, then quiet, then ABS light goes out
5. Close bleeder
6. Foot off pedal
Can you use these BMW sensors on their own as wheel speed sensors for TC?
That's going to depend on the TC system you're using. The BMW sensors are "active" sensors (which I think are Hall effect). My RaceLogic TC system only supports passive sensors (reluctors), and requires some kind of adapter if you want to use it with active ones.
Correct. This would seem like good news? I don't have ABS but have been thinking about TC. When I replaced the front hubs, I opted for ABS rings for this purpose. Front ABS knuckles are cheap as well. The BWW sensors are cheaper than Miata sensors it appears.
08-29-2021, 03:28 PM
1
