LS3 ECU and fuse box mounting

[House Money]

Working on wiring - so far the least exciting part of the build! At this point I have the LS3 wiring just laid out so that it reaches all the sensors, nothing is connected or mounted. I have enough length in the main trunk of the harness to possibly mount the ECU and box under the bench seat, I probably would need to raise the seat a little more than what the included seat risers would provide, about another 2 inches should do it I think. What are your thoughts about this location?
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[wallace18]

You will need some sort of air to keep ECU cool.If it is in a sealed area the heat from the floor could cause problems. I mounted my LS3 stuff inside and outside firewall.

See post #28 and 30. The 33 is the same from firewall forward.

https://thefactoryfiveforum.com/showthread.php?24901-Richey-s-33-build-by-wallace18-Gen-1

[House Money]

Do you really think it could get too hot under the seat for the ECU? They live in the engine compartment on a factory built car, I sure hope that the inside of my cab is cooler than under the hood of a car!!

Gary

[wallace18]

Do you really think it could get too hot under the seat for the ECU? They live in the engine compartment on a factory built car, I sure hope that the inside of my cab is cooler than under the hood of a car!!

Gary

They may be fine there. I do know that with the mufflers under the floor the floor gets really hot.

[DamnYankee]

I mounted all my ECUs behind the dash against the FW, up high.
Put the LS relay/fuse box under the AC unit.

[House Money]

I mounted all my ECUs behind the dash against the FW, up high.
Put the LS relay/fuse box under the AC unit.

Thanks, do you have any pictures of this in your build thread?

[DamnYankee]

This is before completion. I have more modules mounted to the left of these too.
And you can see the LS fuse/relay box below the Evaporator.

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