55.2-59 Mounting Computer Module - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Don Pratt · 03-23-2021, 01:22 PM

Hi all, I have a 57 Chevy 3100 with a 94 Camaro front clip and LT1/4L60E and I need to mount the computer control module somewhere under the dash. Has anyone done this before? If so, did you fab your own mounts? Find something online? Anything to steer clear of?

Johns327 · 03-23-2021, 02:39 PM

Have you considered under the driver seat? I put my ECU there and ran the cables through a hole in the floor and up the back of the transmission. Just a thought, under the dash can get pretty crowded.

Don Pratt · 03-23-2021, 02:53 PM

Quote:

Originally Posted by Johns327

Have you considered under the driver seat? I put my ECU there and ran the cables through a hole in the floor and up the back of the transmission. Just a thought, under the dash can get pretty crowded.

Perfect! Just the kind of advice I was looking for. Thanks! But how did you mount it?

**jweb** · 03-23-2021, 03:10 PM

On my 51, I mounted the computer under the seat. I used this GM bracket and it worked great.
https://www.amazon.com/ACDelco-15995.../dp/B07TB5QK3R

Don Pratt · 03-23-2021, 04:35 PM

Quote:

Originally Posted by jweb

On my 51, I mounted the computer under the seat. I used this GM bracket and it worked great.
https://www.amazon.com/ACDelco-15995.../dp/B07TB5QK3R

Nice! Thanks.

Johns327 · 03-23-2021, 06:28 PM

Don,
Mine is a Holley terminator so it deals with transmission, fuel, and ignition. I put it on isolators to keep it off the floor. The transmission connector and the exhaust sensor are right under the floor. I made a little dog house to pass the cables under the floor that I could seal up. I still have some wiring to shorten up but for now the coils are fine.
John

Don Pratt · 03-24-2021, 05:04 PM

Quote:

Originally Posted by Johns327

Don,
Mine is a Holley terminator so it deals with transmission, fuel, and ignition. I put it on isolators to keep it off the floor. The transmission connector and the exhaust sensor are right under the floor. I made a little dog house to pass the cables under the floor that I could seal up. I still have some wiring to shorten up but for now the coils are fine.
John

Nice!

Don Pratt · 03-24-2021, 05:11 PM

Quote:

Originally Posted by Johns327

Don,
Mine is a Holley terminator so it deals with transmission, fuel, and ignition. I put it on isolators to keep it off the floor. The transmission connector and the exhaust sensor are right under the floor. I made a little dog house to pass the cables under the floor that I could seal up. I still have some wiring to shorten up but for now the coils are fine.
John

From the looks of the interior that is a beautiful truck.

Johns327 · 03-24-2021, 11:06 PM

Don, Thank you, it’s been a project with lots of hard learned lessons. If you end up under the seat with the ECU you can bring any dash wires up through the kick panels. No need to lay wires under the carpet.

**mr48chev** · 03-25-2021, 01:15 AM

I'm late to the party but sure like John's327 way of having all those units right where you can get to them rather simply.

I'd swear that some of the engineers who design late model rigs have a game of where can we hide it so the mechanic can't find it going on. That might not be bad when you are a 24 year old tech straight out of technical school but not fun when you are a 74 year old fluffy former mechanic who got out of mechanics about the time computers came in.

03-23-2021, 01:22 PM	#1
Don Pratt Registered User Join Date: Jan 2012 Location: Des Moines, Iowa Posts: 27	Mounting Computer Module Hi all, I have a 57 Chevy 3100 with a 94 Camaro front clip and LT1/4L60E and I need to mount the computer control module somewhere under the dash. Has anyone done this before? If so, did you fab your own mounts? Find something online? Anything to steer clear of? Attached Images __________________ 67 Chevy CST 57 Chevy 3100 w/94 Camaro front clip, drivetrain & LT1 67 Pontiac GTO unrestored, incredible condition.

03-23-2021, 02:39 PM	#2
Johns327 Registered User Join Date: Jun 2017 Location: Bonsall, CA Posts: 104	Re: Mounting Computer Module Have you considered under the driver seat? I put my ECU there and ran the cables through a hole in the floor and up the back of the transmission. Just a thought, under the dash can get pretty crowded. __________________ 1955 second series, 3200 standard bed, big window. Owned since 1975, decided it was time to do a frame off. 327, 4L80e, Ford 9 inch.

03-23-2021, 03:10 PM	#4
jweb Senior Member Join Date: Apr 2010 Location: Oregon Posts: 1,208	Re: Mounting Computer Module On my 51, I mounted the computer under the seat. I used this GM bracket and it worked great. https://www.amazon.com/ACDelco-15995.../dp/B07TB5QK3R __________________ 1951 Truck, LS1/4L60 1964 Suburban, current project 2014 Silverado daily driver 1953 Westerner "canned ham" trailer, rebuilt 1974 Prowler trailer, rebuilt

03-23-2021, 06:28 PM	#6
Johns327 Registered User Join Date: Jun 2017 Location: Bonsall, CA Posts: 104	Re: Mounting Computer Module Don, Mine is a Holley terminator so it deals with transmission, fuel, and ignition. I put it on isolators to keep it off the floor. The transmission connector and the exhaust sensor are right under the floor. I made a little dog house to pass the cables under the floor that I could seal up. I still have some wiring to shorten up but for now the coils are fine. John Attached Images __________________ 1955 second series, 3200 standard bed, big window. Owned since 1975, decided it was time to do a frame off. 327, 4L80e, Ford 9 inch.

03-24-2021, 11:06 PM	#9
Johns327 Registered User Join Date: Jun 2017 Location: Bonsall, CA Posts: 104	Re: Mounting Computer Module Don, Thank you, it’s been a project with lots of hard learned lessons. If you end up under the seat with the ECU you can bring any dash wires up through the kick panels. No need to lay wires under the carpet. __________________ 1955 second series, 3200 standard bed, big window. Owned since 1975, decided it was time to do a frame off. 327, 4L80e, Ford 9 inch.

03-25-2021, 01:15 AM	#10
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,705	Re: Mounting Computer Module I'm late to the party but sure like John's327 way of having all those units right where you can get to them rather simply. I'd swear that some of the engineers who design late model rigs have a game of where can we hide it so the mechanic can't find it going on. That might not be bad when you are a 24 year old tech straight out of technical school but not fun when you are a 74 year old fluffy former mechanic who got out of mechanics about the time computers came in. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



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