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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 09-24-2017, 04:37 PM   #1
V8hoonin
 
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Ls swap help

so, ive looked literally everywhere including silviav8 and i cannot find 1 thread that talks about mounting the ecu, im trying to figure out where to put mine for my ls swap in my s13 and i cant seem to find 1 pic or anything, i wanted to see what people do before i went on my own and made something work, so please if you have any pics or input id much appreciate it.
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Old 09-24-2017, 04:43 PM   #2
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Put it in the factory ecu spot maybe secure it to the frame with. Zip ties not really necessary but it helps put kick panel back on call it a day
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Old 09-24-2017, 04:50 PM   #3
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i wish it was that simple but the gm ecu is twice the size of my ka ecu
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Old 09-24-2017, 05:33 PM   #4
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Never dealt with LS but you could maybe cut a hole in the glove box and feed the ECU connector through, then keep the ECU in the glove box


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Old 09-25-2017, 09:19 AM   #5
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I'll have to send you a picture of how I did mine I have test fitted a 02 ls1 ecu and now that I've gone lq9. ecu still fits in the same spot minus the kick panel ls and lq ecu same size and shape different plug colors
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Old 09-25-2017, 09:27 AM   #6
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Not sure how much bigger other LS ECUs are but I have my LS3 ECU in the factory kick panel location.
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Old 09-25-2017, 09:31 AM   #7
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You got a pic??
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Old 09-25-2017, 10:00 AM   #8
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The LS3 ecu is not much bigger than an external hard drive. The early ecu's are massive for no reason
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Old 09-25-2017, 10:02 AM   #9
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I have the older massive style
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Old 09-27-2017, 10:04 PM   #10
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I have mine in the stock location as well
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Old 09-28-2017, 06:20 AM   #11
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The size difference between KA/SR and the LS style is pretty significant.

For now, I just have mine laying up against the firewall with the floor mat holding it in place. Would be nice to find and way to solidly mount it, but it's almost more trouble than it's worth since it won't fit behind the kick panel like the original Nissna ECM.
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Old 09-28-2017, 09:14 AM   #12
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Quote:
Originally Posted by onehundredoctane View Post
The size difference between KA/SR and the LS style is pretty significant.

For now, I just have mine laying up against the firewall with the floor mat holding it in place. Would be nice to find and way to solidly mount it, but it's almost more trouble than it's worth since it won't fit behind the kick panel like the original Nissna ECM.
same here, my LS pcm wont fit in the oem location. I want a new location but its not a priority anytime soon.
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Old 10-09-2017, 11:09 AM   #13
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OK, normally I would be able to find this info on my own, but Either I am really tired or google is not my friend today. And apologies for thread jacking if this take you all off topic too much. Is it possible to use the OEM engine/transmission wiring harness from my donor 2010+ Camaro to get it up and running in an S13? If some one has a link to a write up that would be great as well. Thank you ahead of time


Also as a suggestion for the ECU, mount it where the factory ABS unit would be unless you have ABS. You could fab a heat shield and cut a hole in it for the harness to pass through. Be sure to use a grommet in that hole so your not damaging the wires and protect the ECU as well.
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Right side (USDM Passenger side) Replica S13 OEM Silvia Aero Bumper Grill

S13 Silvia J's, Q's, K's, A's Bumper grill inserts.

Male Plugs for S15 headlights

PM me if you need them.
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Old 10-09-2017, 11:18 AM   #14
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All the guys who did this swap wayyyy back in the day used the factory GM harness
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Old 10-09-2017, 12:21 PM   #15
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Literally 4 wires that need to be modified to make it work, AFTER you disable VATS.
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Old 10-09-2017, 01:52 PM   #16
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Good deal.
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Do you need;

Right side (USDM Passenger side) Replica S13 OEM Silvia Aero Bumper Grill

S13 Silvia J's, Q's, K's, A's Bumper grill inserts.

Male Plugs for S15 headlights

PM me if you need them.
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Old 10-09-2017, 04:54 PM   #17
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I took out my passenger airbag and mounted the ecu in that location
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Old 10-09-2017, 05:02 PM   #18
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I got a 1990 240sx with no airbags
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Old 10-09-2017, 05:04 PM   #19
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theres definitely room under the dash then
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