DIY - Hella Supertone horns installation on FR-S

[Freeman]

Originally Posted by mit_peid

Dumb question, but for this 10mm bolt, is the nut 10mm, is the bolt 10mm long, or the diameter of the thread on the bolt 10mm? Seems like if we used a regular yellow (for 10-12 gauge wire) ring, wouldn't the 10mm bolt/nut combo be too big?

I'm preparing to do the hella install today on my FRS.

i went to a Home Depot and picked up a Bolt, washer and nut. I brought one of the wires with me and got a bolt that fit.

[mit_peid]

Yeah just came back from Lowe's and picked these up. M5-.80 x 16's with wave washers and hex nuts. Going to try to use these for grounding of both the high and low. They're 8mm hex not 10mm. Hopefully they'll work just as well. Forgoing the Hella-provided relay too for my install.

[driver01]

Originally Posted by mit_peid

Dumb question, but for this 10mm bolt, is the nut 10mm, is the bolt 10mm long, or the diameter of the thread on the bolt 10mm? Seems like if we used a regular yellow (for 10-12 gauge wire) ring, wouldn't the 10mm bolt/nut combo be too big?

I'm preparing to do the hella install today on my FRS.

Sorry for the confusion. 10mm refers to the size of the head, thus the wrench or socket used to remove this bolt would be a 10mm wrench. In reality it would be a m6x1.0mm bolt. m6 meaning metric 6mm. 1.0mm would be the thread pitch. in this case length is not specified.

[mit_peid]

I ended up drilling two holes in the bumper to get my two grounds since my rings weren't the correct size. I always seem to have difficulty finding rings to tap into existing stock bolts even when I was more active doing car stereo stuff.

[mashal]

Why are you guys drilling places or installing ground studs to get a ground ?
The connector on the right side has a ground .. Use that. You just need a spade lug and splice that to have to grounds ..

[mit_peid]

Originally Posted by mashal

Why are you guys drilling places or installing ground studs to get a ground ?
The connector on the right side has a ground .. Use that. You just need a spade lug and splice that to have to grounds ..

It is now done. The grounds via my new holes are now done, clean, and strong. I like to ground as close and secure to the chassis as I can without extra wire adding additional resistance to ground. I also didn't just use a blade connector onto the stock low-freq power cause there appears to be some electrical grease in there that made that connection weak so I just cut that too and ensured I had a good strong crimp to that signal. The Hellas are indeed hella loud.

The only two things about my install is that using the mounting locations suggested by the OP, the horns appear slightly off-centered. Maybe it is just something I notice, but probably off by a few millimeters. In the entire bumper removal process I damaged one plastic fastener and got another one unaccounted for at the end. Also wasn't sure if my mud-flaps under the bumper were placed back exactly 100% like it was stock.

[mit_peid]

Here are some photos from my install. As you can see it is slightly off-centered. I may go back in one day to move/adjust them, maybe back to the stock mounting locations. My preference would to not to have the front license and the horns blocking the radiator, but it shouldn't impact things too much.

[Freeman]

Originally Posted by mit_peid

Here are some photos from my install. As you can see it is slightly off-centered. I may go back in one day to move/adjust them, maybe back to the stock mounting locations. My preference would to not to have the front license and the horns blocking the radiator, but it shouldn't impact things too much.

Mine are off center also. I plan on finding a new way to mount them when I pull the bumper off to install a CAI.

[mit_peid]

Originally Posted by Freeman

Mine are off center also. I plan on finding a new way to mount them when I pull the bumper off to install a CAI.

Off-topic, but which CAI intake are you planning on getting? AEM? That might be the next time I remove the bumper too (to install a CAI)... the slight off-centered-ness (if that's a word) of the Hellas is bothering me a bit and makes the very slightly off-centered-ness of my license mount more pronounced.

Or I might get in there to install some fog-lights once more options are available... I guess this entire exercise was also good to get used to how to remove the front bumper.

[dolph]

Just followed these instructions over the weekend, for the most part. Figured I'd share my experience to make it easier for others...

Removing & replacing the bumper sucked. Corner markers do not come off easy, and must literally be pried off until they pop. The sides of the bumper in front of the corner markers essentially come off in the same manner -- just pull firmly until 3 or 4 tabs pop loose. I was caught off guard by the variety of different bolts and push tabs holding the bumper on -- make sure you keep those organized as they come off.

There's also a push tab in each hole left by a corner marker (facing upwards). It took me forever to find those.

I also wired the whole thing twice -- once as described in this post before tearing all that out and replacing it. I ended up splitting the existing wiring (ground=black, positive=black+green) and running it to both horns in parallel, including ground. This also keeps the horns on the existing fuse(s). Side note -- you don't need any new bolts to wire it this way, as you don't have to create a ground.

I can also confirm that the existing horns run at 12v, so use of the relay is not necessary.

[mit_peid]

This is by far the best DIY step-by-step for removing the front bumper.

http://www.grillcraft.com/installs/i...install_id=309

It made removing the side-markers a lot easier. Also helps if the car is lifted a bit so you can see which fasteners are of what type.

[calis5nest]

sound clip on frs plz

[Freeman]

Originally Posted by mit_peid

Off-topic, but which CAI intake are you planning on getting? AEM? That might be the next time I remove the bumper too (to install a CAI)...

i havent decided. i might go perrin or i might go FA20club.

[edward]

Installed a pair of Supertones on my BRZ yesterday. It's possible to do it without cutting the stock wiring by trimming down a standard blade connector so it fits in the stock power connector. Also, my BRZ didn't have a second threaded bolt hole on the left side for the second ground connector, so I had to use a nut and lock washer instead.