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Author Topic: Pcm harness fire wall hole.  (Read 3559 times)

Offline RX7Driver4Life

Pcm harness fire wall hole.
« on: March 01, 2014, 08:45:45 PM »
I would like to know what you guys are using to seal the hole where the ls1 harness comes through. I want to try and get it plugged up now while I have the dash and all the AC components out.there are also two holes were the original front harness came into the chassis on the driver side that I no longer use it's about two and a half inches and other one is about inch and a half anyone know where I can find some plugs to plug Thoes up.
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93 LS1/T56 FD RX-7

Offline quinns

Re: Pcm harness fire wall hole.
« Reply #1 on: March 01, 2014, 10:02:59 PM »
I had the factory grommet put on the LS harness. I just stuck the factory grommets in all the other holes and sealed them off with black rtv silicone. I spent a bit searching for replacement blank grommets and had no luck.
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1993 Rx-7 Base LS3 TR6060 Ronin 8.8
1997.5 Hummer H1
2006 Hummer H2 SUT

Offline wickedrx7

Re: Pcm harness fire wall hole.
« Reply #2 on: March 01, 2014, 10:08:18 PM »
I slit the stock Rx7 grommet and used that.
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1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7

Offline theantirotor

Re: Pcm harness fire wall hole.
« Reply #3 on: March 01, 2014, 11:44:18 PM »
I went to a junkyard and found one I liked.
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:bacon:

Offline RX7Driver4Life

Re: Pcm harness fire wall hole.
« Reply #4 on: March 02, 2014, 08:20:53 AM »
Hmmm what car did you find one from i really wanted to put on something new but like it was mentioned above i have had no luck finding caps that big. I was thinking of shaping one out of bondo and sealing it with rtv for the holes where the front harness came in through but as far as the pcm i have been stumped.
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93 LS1/T56 FD RX-7

Offline largeorangefont

Re: Pcm harness fire wall hole.
« Reply #5 on: March 04, 2014, 12:22:18 PM »
It is expensive for what it is but I used this grommet from summit. It easily stretched over the harness for installation. It has a 4 inch OD.

http://www.summitracing.com/parts/sit-gs404-16/overview/

I pop riveted it to the firewall. I added an extra D shaped piece so I could pull the ECU plugs through the firewall if I ever had to.

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Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline mech-head

Re: Pcm harness fire wall hole.
« Reply #6 on: March 04, 2014, 01:12:58 PM »
Quote from: largeorangefont on March 04, 2014, 12:22:18 PM
It is expensive for what it is but I used this grommet from summit. It easily stretched over the harness for installation. It has a 4 inch OD.

http://www.summitracing.com/parts/sit-gs404-16/overview/

I pop riveted it to the firewall.

I used a similar arrangement.  Not my favorite solution, but it works.
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Offline digitalsolo

Re: Pcm harness fire wall hole.
« Reply #7 on: March 04, 2014, 03:17:11 PM »
I have those on my harness also.
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Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...
2007 Aston Martin V8 Vantage - Gen V LT4/TR6060, upper/lower pullies, headers, tune.
2021 Tesla Model 3 Performance - Stock...ish.

Offline j_tizzle_84

Re: Pcm harness fire wall hole.
« Reply #8 on: March 13, 2014, 08:51:33 AM »
1
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90 rx7 gxl lq4, 59cc patriot stage 2 heads, arp head studs, comp trunnions, all arp bolts thru out, tsp 228r 114lsa, ls6 intake, bbk 80mm tb, cold air intake, ceramic coated long tube headers, dual 2.5 with x pipe  magnaflows,00 mustang gt wheel w/ 275/40r17 nitto 555r, t2 rear swap delrin diff and subframe mounts welded front diff mount, custom diff brace, diamond stage 2 clutch w/ 15lb billet flywheel.

Offline j_tizzle_84

Re: Pcm harness fire wall hole.
« Reply #9 on: March 13, 2014, 08:53:22 AM »
Quote from: largeorangefont on March 04, 2014, 12:22:18 PM
It is expensive for what it is but I used this grommet from summit. It easily stretched over the harness for installation. It has a 4 inch OD.

http://www.summitracing.com/parts/sit-gs404-16/overview/

I pop riveted it to the firewall. I added an extra D shaped piece so I could pull the ECU plugs through the firewall if I ever had to.



I am using the same grommet, I think I got the idea from your thread.
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90 rx7 gxl lq4, 59cc patriot stage 2 heads, arp head studs, comp trunnions, all arp bolts thru out, tsp 228r 114lsa, ls6 intake, bbk 80mm tb, cold air intake, ceramic coated long tube headers, dual 2.5 with x pipe  magnaflows,00 mustang gt wheel w/ 275/40r17 nitto 555r, t2 rear swap delrin diff and subframe mounts welded front diff mount, custom diff brace, diamond stage 2 clutch w/ 15lb billet flywheel.
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