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FI ECM Mounting: Good Spot?

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Old Apr 30, 2006 | 02:27 AM
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Default FI ECM Mounting: Good Spot?

I'm trying to find a good spot to mount the LT1 ECM under the dash area of my 70 coupe, which is difficult since the dash, or any interior for that matter, is in the car yet. I found this spot, and other than possibly trimming an inche or two off the top of the kick panel it could work. Any thoughts or other recommendations for mounting this thing?






Last edited by Stumpdeisel; Apr 30, 2006 at 02:29 AM.
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Old Apr 30, 2006 | 05:21 AM
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That's a 7727 weatherproof ECM. Why not mount it in the engine bay?
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Old Apr 30, 2006 | 05:26 AM
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yup, it's a weatherpack ECM, I would mount it inside the engine bay somewhere.
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Old Apr 30, 2006 | 08:23 AM
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It's that somewhere that gets you, I couldn't find a spot for my MSD, which is one reason I don't have it installed....
I have a non weather CPU, and so it's inside, I feel less heat is allways a good thing for electronics....

GENE
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Old Apr 30, 2006 | 08:53 AM
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I mounted my L-98 PCM up underneath the cruise control transponter. Drivers side fender well. My LS1 PCM is on the other side now. It's out of the heat and doesn't get wet.
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Old Apr 30, 2006 | 10:29 AM
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Those of you that mounted it inside, any find a good spot under the dash, and where exactly did you put it? Looking for suggestions...

A 92-93 ECM is weatherpacked? I know the 97 ECM I had was but was unsure about this one, good to know in case I give up on finding a spot in the car...

Last edited by Stumpdeisel; Apr 30, 2006 at 10:32 AM.
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Old Apr 30, 2006 | 11:45 AM
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Stump, what's the number on the case? It looks exactly like the 7727s that I have, which are made for underhood mounting. Makes wiring the engine much easier. I'm pretty sure the LT-1 Corvettes used the underhood mounting position.

www.diy-efi.org/gmecm - lots of info on the 7730/7727 family.
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Old Apr 30, 2006 | 12:05 PM
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The painless wiring harness comes with a fuse box, that has to be in the car though right? It doesn't seem to be waterproof.
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Old Apr 30, 2006 | 04:20 PM
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My guess is that the fuse panel is for interior mounting, unless it says that it's safe for underhood use.
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Old Apr 30, 2006 | 04:49 PM
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My ls1 pcm is inside behind map pocket,you can just see the last inch or 2 of the bottom of the map pocket,the tpi ecm was hidden behind the map pocket,it was smaller.
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Old Apr 30, 2006 | 06:25 PM
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Originally Posted by patsnitrovette
My ls1 pcm is inside behind map pocket,you can just see the last inch or 2 of the bottom of the map pocket,the tpi ecm was hidden behind the map pocket,it was smaller.
I mounted my Holley Commander ECM behind the map pocket also. It happened to fit very well in the space where the old radio transitor output amp used to be. Today's radios don't require externel power output transistors and I have no plans for rumbling the windows of adjacent cars with an external amp.......the 427 with Hookers does a good job of that

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Old Apr 30, 2006 | 06:50 PM
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I've mounted both fuse boxes in the engine bay. Never had a problem.
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Old Apr 30, 2006 | 09:00 PM
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Originally Posted by Bullshark
I mounted my Holley Commander ECM behind the map pocket also. It happened to fit very well in the space where the old radio transitor output amp used to be. Today's radios don't require externel power output transistors and I have no plans for rumbling the windows of adjacent cars with an external amp.......the 427 with Hookers does a good job of that

Bullshark
This location worked for me also. Lots of room behind the map pocket panel.
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Old Apr 30, 2006 | 09:27 PM
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Hi All,

My FAST ECU is mounted in the glove compartment where it easy to connect to a laptop. It is a dry, not overly hot location. When I first converted to the TPI, I used a stock GM ECU and mounted it behind the gill. This was readily accessible and I never had a problem.

Ken
Albuquerque
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