So I recently finished up all the thinning/removal of unnecessary electrical accessories of my E30 318is wiring harness. The old plastic tubing and combination of fabric and plastic electrical wrap crumbled apart and made a huge mess, anyways...
So my question is, what is the best method of tying all this wiring together to keep it organized, somewhat protected from dirt and the elements, and probably most importantly, avoid damage from abrasion?
Anything better than just using a whole lot of generic vinyl electrical tape?
Thanks.
Last edited by mkodama; 05-11-2010 at 04:52 AM.
Standard wrap around loom from McMaster Carr.
Those look great http://www.pegasusautoracing.com/group.asp?GroupID=WRAP
I use the plastic split loom that all the Japanese cars use. You can buy it by the box at Napa. Then I use the high temp 3M tape they sell at home depot.
Thanks for the responses!
I was partway expecting fancier, more expensive stuff and then getting a lecture on how important proper protection of an electrical system is vital to my safety, but good to know the basic stuff does the job, lol.
Last edited by mkodama; 05-11-2010 at 05:21 AM.
I just used electrical tape, but I stagger the tape so that the wires are partially exposed. So It kind of looks like a barber pole; a stripe of tape, then s stripe of wires, rinse, repeat. This allows me to still trace wires without having to unwrap everything...
The corrugated split tubing is good for just about everywhere on a car. The split allows for easy access for maintenance and troubleshooting. I rarely use spiral wrap stuff and only where I need maximum durability.
You can't afford to go that fast.
The more Mustang parts I put in my BMW, the faster it goes.
The problem with electrical tape is that the adhesive gunks up the wires with heat and time. I like that split loom stuff, which is also available in fire resistant grades and in sizes from at least 3/8" to 3/4". You can also get snap-on (lower case) Y and T connectors for it.
Here's one source for the flame retardant stuff: http://order.waytekwire.com/products...e%20Coverings/
You do have to buy it in 100' coils, but it's cheap.
I'm a little compulsive about wiring protection. Ironically my car suffered a major short circuit under the driver's side dashboard at the Glen a couple of years ago. The acrid smoke pouring out just above my knees caused me and my passenger to pull over and exit the car in a big hurry. Ironically it turned out to be abrasion failure of an original stock wiring bundle that had been inadequately taped at the factory.
Neil
The factory harness is a disaster. I was shocked when I pulled the interior out and saw that BMW just basically flung the harness down under the carpet. If you look at a Japanese harness, it's attached to the body every 8" or so. I split loomed the entire interior harness. Christ, look at where it goes through the rear seat brace. It just rubs on the sheet metal. It's just the crappiest thing I've ever seen. My $12K civic was wired better.it turned out to be abrasion failure of an original stock wiring bundle that had been inadequately taped at the factory.
We use cloth hockey tape. It doesn't gunk up as badly as electrical tape and can be removed for modifications without too much trouble.
Peter Carroll - http://www.driversmeeting.com/pcarroll
BMW Club Instructor & Club Racer, 1997 BMW M3 GTR #321
2008, 2009, & 2011 BMW CCA National C-Mod Champion
Videos channels at:
http://vimeo.com/pcarroll/videos
http://www.youtube.com/user/pc270
are you making this a track car miles?
Cloth tape is great i use 3M friction tape and then put wire loom over everything.
Thanks for the additional replies. Right now I'm kinda undecided between the split convoluted and spiral wrap.
I need to lay my wiring harness out to find how thick all the bundles of wires are now to figure out what sizing I would need. Spiral wrap seems kinda nice for its one-size-fits-all design.
Yup. Why else would I be removing "unnecessary electrical accessories" and posting in the motorsports forum.
I ended up going with the some spiral wrap of the clear, nylon, self-extinguishing variety, rated for -40°F to +250°F from mcmaster. http://www.mcmaster.com/#sleeving/=75i7ym
It seemed to be the best option in terms of easy application and removal, needing only one or two diameters for the job, and easy to service. I can't wait until I get this wiring project finished up!
Sorry to get Off Topic, but this was NOT the case on my car, the loom IS actually attached to the shell every two feet (approximately) with black plastic zip-tie looking rings that have a rivet or sorts into the sheet metal on the bottom side. They are not reusable and I had to remove them all by giving a quick pull on the loom and the plastic ring snaps (shears) right off.
lol, buying the spiral wrap was a huge mistake. Takes way too long to apply it.
It looks decent, each size covers a pretty broad range of wire bundle sizes, it seems to give good abrasion protection and the rated self-extinguishing and temperature specs are probably good, but it is not worth the time to apply at all.
Now to try something else...
'88 325is S50 conversion by Sports and Imports, Chesapeake, VA. Maintained by Bimmerworld.
Photo by Sideline Sports Photography, LLC. http://web.me.com/mstahlschmidt/Side...aphy/Home.html
Bookmarks