Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
08-05-2022, 08:54 PM | #1 |
Registered User
Join Date: Nov 2012
Location: canby,oregon
Posts: 356
|
Computer mounting location
Swapped in a 5.3 in the 67 GMC k10 and was curious where others mounted the computor , I would like to mount it under the drivers seat but not sure the harness will b long enough.
|
08-05-2022, 10:05 PM | #2 | |
Registered User
Join Date: Dec 2012
Location: Temple City
Posts: 3,628
|
Re: Computer mounting location
Quote:
I am going to do a 24x swap on my gen 2 LT1, and plan to put it in the corner next to the master cylinder. |
|
08-06-2022, 04:51 PM | #3 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
|
Re: Computer mounting location
I put mine behind the glove box. I had to section the glove box liner a bit to make it fit. Standard ECM harness.
|
08-07-2022, 08:29 PM | #4 |
Senior Member
Join Date: Mar 2015
Location: washington
Posts: 2,296
|
Re: Computer mounting location
If you have AIR, or plan to, behind the glove box will not work.
I mounted mine by the RH hinge on the firewall. Wiring is between the fender well and the cab. I got it to fit by loosing the inter fender screws and installing the wiring. It isn't going anywhere because it cant. Had the same issue dictated by a modified harness not a full on replacement. I can be seen in the top left of the picture. It doesn't even come close to interfering with the hood hinge operation. |
08-08-2022, 08:42 AM | #5 |
Registered User
Join Date: Oct 2013
Location: Alabama
Posts: 1,234
|
Re: Computer mounting location
backside of the radiator support. Easy access, completely out of sight and practically no one ever notices it plus most factory GM harnesses are long enough that no lengthening is required.
|
08-08-2022, 05:03 PM | #6 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
|
Re: Computer mounting location
I mounted mine inside the fender, ahead of the fender liner. Basically the backside of the fender turn down that the washer bottle is mounted to...just ahead of the washer bottle. Donor harness is perfect length. Mounted the fuse box to the inner fender.
|
08-08-2022, 05:07 PM | #7 |
Senior Member
Join Date: Mar 2015
Location: washington
Posts: 2,296
|
Re: Computer mounting location
Both good options. My harness was a Corvette and it was too short for any of the great places you both mentioned.
|
08-08-2022, 10:19 PM | #8 |
Senior Member
Join Date: Nov 2015
Location: Pine City MN
Posts: 363
|
Re: Computer mounting location
I originally had intended to mount my GM ECU /ECM computer under the dash. But in the end it was so hacked up by the auto salvage yard, I was forced to look at other options. I ended up with the Holley terminator x. As it turns out , the harness has plenty of length to mount the ECU under the bench seat on the passenger side.
I ran the harness down the back side of the engine along the underside of the transmission tunnel, and up under the passenger side of the bench seat. Just an option for those with a hacked up harness, or no harness or those thinking of hiding the ECU and wiring a bit
__________________
72 C10, Was a 350,M20, Brodix heads,Comp cam, Edelbrock intake&carb, Hedman hedders LWB. Project is now a 5.3(L33) w/PRC stage 2.5 CNC ported 243heads, BTR RedHot cam,Holley Terminator X, T56 magnum. SWB, Boyd tank. 4.5/4 Drop http://67-72chevytrucks.com/vboard/s...My72c10project |
08-10-2022, 02:21 PM | #9 |
low n' slo
Join Date: Mar 2009
Location: rosenberg, texas
Posts: 5,175
|
Re: Computer mounting location
i dont have stock inner fenders, but i did make some tubs. with the stock wiring i couldnt get it to reach far at all, so mine is going on top of the fender well...along with the mini fuse box and pedal box. if you had a driver side battery tray, it will fit there. almost did that but went with the fender mounting.
__________________
67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____|__|__\__ ,.,,,.,.,,.,|_O _______ O_] |
08-10-2022, 05:12 PM | #10 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
|
Re: Computer mounting location
I try to hide as many wires as possible. ECM and relays in the cab. In the attached pic you can just see the ECM wire loom behind the right coil cover.
|
08-10-2022, 05:56 PM | #11 |
Registered User
Join Date: Nov 2012
Location: canby,oregon
Posts: 356
|
Re: Computer mounting location
I really appreciate all the input, the more the better and unfortunately I still have the factory heater core suit case so the passenger side firewall is a no go but I do like it!!!
|
08-10-2022, 06:22 PM | #12 |
low n' slo
Join Date: Mar 2009
Location: rosenberg, texas
Posts: 5,175
|
Re: Computer mounting location
clean! i dont know how you guys hide the wires like that lol
__________________
67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____|__|__\__ ,.,,,.,.,,.,|_O _______ O_] |
08-11-2022, 05:05 PM | #13 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
|
Re: Computer mounting location
For the LS wire harness you can pull most of the wires to the back of the engine. They will fit under the plastic coil covers.
The chassis harness to the front I ran down left frame rail. I used used a Painless universal chassis harness. I filled the the stock fuse block hole. Then moved the Painless fuse block back a bit and then made a small hole you can't see to run the front chassis wires forward along the frame rail. The Painless wires are plenty long enough. Here's a pic of my current 80 Camaro LS3 swap. |
08-11-2022, 05:35 PM | #14 |
low n' slo
Join Date: Mar 2009
Location: rosenberg, texas
Posts: 5,175
|
Re: Computer mounting location
very clean I think my next go round I'll will have to try something like this
__________________
67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____|__|__\__ ,.,,,.,.,,.,|_O _______ O_] |
08-13-2022, 07:12 PM | #15 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
|
Re: Computer mounting location
i used psi harnesses on 2 trucks. neither harness will reach under the seat,, that leaves under hood or inside cab on firewall.. i have the one on my 81 behind the glovebox
i even contacted psi about making me a harness with a longer tail..no dice..the next one i do will probably be with a bp harness.. everyone says its long enough to reach under seat.. we will see.. my next project will have a/c so i know there wont be room under dash
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
08-13-2022, 08:32 PM | #16 |
Registered User
Join Date: Nov 2012
Location: canby,oregon
Posts: 356
|
Re: Computer mounting location
I hate anything under the dash,tough for the old and stiff to access and its a tight area for tools to work in,unless your starting from scratch.
|
09-01-2022, 09:38 PM | #17 |
Senior Member
Join Date: Mar 2015
Location: washington
Posts: 2,296
|
Re: Computer mounting location
If the wires allow it mounting the ECM between the battery and the core support works well for a lot of people. Hidden but still stays cool.
Cheers. |
09-02-2022, 08:21 PM | #18 |
Senior Member
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,956
|
Re: Computer mounting location
Wanted to post my location. Under the dash near the wiper motor. I did use the radio mount holes but I don’t believe I will need them with my retro radio. Bear in mind this is a Holley terminator ECU but any ECU should work here.
__________________
Kirk 72 Blazer CST 4wd highlander Last edited by Blazerowner; 09-06-2022 at 08:12 PM. |
09-10-2022, 08:42 AM | #19 |
Registered User
Join Date: Apr 2014
Location: Bridge Creek , Oklahoma
Posts: 69
|
Re: Computer mounting location
Hard to see but I made a mount that slides in/ out and put my behind my restomod heater/ ac box
Can get better pictures if needed |
09-11-2022, 08:43 PM | #20 |
Registered User
Join Date: Apr 2012
Location: Chatt Tn
Posts: 982
|
Re: Computer mounting location
my bp harness reached under the pass seat. nice and clean. ran the harness down the trans and up into the floor. 1971 c10
__________________
88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535 |
09-15-2022, 10:04 PM | #21 |
Registered User
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
|
Re: Computer mounting location
Ideally, I would put it under a seat or console if the harness will reach.
I have a reworked factory harness that is routed off the driver's side of the motor so I put my Gen IV ecm as far forward on the inner fender as I could. It's partially hidden by the air filter. |
09-16-2022, 05:46 PM | #22 | |
Registered User
Join Date: Dec 2012
Location: Lompoc CA
Posts: 118
|
Re: Computer mounting location
Quote:
__________________
1989 5.0 LX Coupe 1989 Saleen #243 1969 C-10 Fleetside 1966 Mustang Coupe GT 1965 Fastback Mustang 1951 F1 Truck |
|
09-16-2022, 07:56 PM | #23 | |
Senior Member
Join Date: Nov 2015
Location: Pine City MN
Posts: 363
|
Re: Computer mounting location
Quote:
Anyway a few pics…. The first one will give you an idea of the location of the for the 2” hole required for the main harness. The power harness, I ran through an existing hole previously used for the fuel tank. The second pic is from below, the harness was routed to the back of the engine, then down along the underside of the transmission tunnel, and up into the cab,in my case I have a high hump, I removed some of the transmission cover bolts, and replaced the bolts with longer ones, and used the longer bolts to secure both the cover and cable clamps. The third pic is just an engine pic, but it shows how little of the harness shows, there are more ways to hide wires, but I was running out of time, and a lot will have to come back off , if I do end up doing a color change to hugger orange in the near future. Hope this helps,
__________________
72 C10, Was a 350,M20, Brodix heads,Comp cam, Edelbrock intake&carb, Hedman hedders LWB. Project is now a 5.3(L33) w/PRC stage 2.5 CNC ported 243heads, BTR RedHot cam,Holley Terminator X, T56 magnum. SWB, Boyd tank. 4.5/4 Drop http://67-72chevytrucks.com/vboard/s...My72c10project |
|
11-14-2022, 01:36 AM | #24 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
|
Re: Computer mounting location
It's been hit and more miss for me commenting on the site, you guys that are running the term x or any other Holley stuff. You should look up HCR customs Devin Vanderhoof. He builds his own LS harness. He sells Holley stuff as I believe he's sponsored by them. He is a master at wiring race cars. He uses top of the line Tesil wire. Look him up on the Tube. He puts his harness and the Holley for comparison. His is a little longer for mounting under seat. Seriously, check him out. Not trying to sell anything just like his stuff.
|
11-16-2022, 01:32 PM | #25 | |
Senior Member
Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,106
|
Re: Computer mounting location
Quote:
__________________
71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350 |
|
Bookmarks |
|
|