Engine bay temperatures?

MadMax78 · Posted: Tue Jan 26, 2010 10:09 am Post subject: Engine bay temperatures?

I'm in the process of installing a Megasquirt FI system in my bus. I need to locate the MS ECU somewhere now and it would be ideal if I could just mount it on the firewall.

The only concern with this is the engine bay temperatures may be too high for the ECU. This is especially a concern when in traffic jams in high ambient temperatures. Does anyone know how hot it can get during these conditions? I guess it will never really be that hot since the engine is continuously sucking out air and thus replenishing the engine bay with new ambient air.

The alternative is to mount it in the closet where the spare tire well is, but in this location it will use closet space and it will be less easy to wire and connect the vacuum lines to it. Besides this, the closet can probably get pretty hot as well when that side of the bus is in the sun in high ambient temperature conditions.

What are your thoughts?
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1978 T2b ASI Riviera Plan I // Camper Special with MegaSquirt Injection & Ignition // 091 with 5.14 R/P and Peloquins LSD
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rockdog2877 · Posted: Tue Jan 26, 2010 10:57 am Post subject:

Can you put it where the current ECU is located?
I don't know the dimensions of the mega squirt, I'm guessing smaller?

Tram · Posted: Tue Jan 26, 2010 11:10 am Post subject:

fusername · Posted: Tue Jan 26, 2010 11:28 am Post subject:

full westy? what about the cabinet up high?
that said, the engine compartment does get quite hot at times, esp idleing in traffic, but I don't think it's too hot for the MS. most electronics are rated to the 70-100 c range, although I am sure you can ask megasquirt what they think, there maybe some sensitive items in there, who knows. Also maybe just mount a fan on it/in the enclousre?
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MadMax78 · Posted: Tue Jan 26, 2010 1:18 pm Post subject:

rumplestilskin · Posted: Tue Jan 26, 2010 1:44 pm Post subject:

when i mounted mine i cut open an original ecu and installed the mega squirt there . than i mounted it into the stock location. i think u are running a redundant system . so make another hatch next to the original one . anywhere else i think would not work. to the right it is susceptible to rain left same thing. only outer option would be under the rear bed than u would need to run very long wires through the fire wall next to the gas tank than make a hole inthe sheet metal under the bed
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currently 71 super auto-stick, 73 ghia, 71 yellow ghia , a 68 square w71 fi, a 77 bus station wagon deluxe. and finaly finaly a 74 riveria with volvo pawer .ITS AN ADDICTION!!!

rumplestilskin · Posted: Tue Jan 26, 2010 1:51 pm Post subject:

oh oh i got a good idea. u can mount it to the inside of the inspection hatch. the big round black one. than u have protection from the elements u are close to the oem ecu and it will be accessable. oh ya i like that idea
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currently 71 super auto-stick, 73 ghia, 71 yellow ghia , a 68 square w71 fi, a 77 bus station wagon deluxe. and finaly finaly a 74 riveria with volvo pawer .ITS AN ADDICTION!!!

MadMax78 · Posted: Tue Jan 26, 2010 3:13 pm Post subject:

rustbus · Posted: Tue Jan 26, 2010 4:06 pm Post subject:

what about behind the gas tank firewall to the right of the tank? where the Eberspacher heater ducting is routed on factory installed units...?

I'd put a pic but aparently photobucket is porn here at work Rolling Eyes

EDIT - ah, lets go this route. pic

Image may have been reduced in size. Click image to view fullscreen.

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Wildthings · Samba Member Joined: March 13, 2005 Posts: 50337

A ACVW bus has about the lowest engine compartment temperature of any vehicle you can find. Don't know what temps the megasquirt can handle, but if it can do any other car it should be able to handle the temperatures likely to be seen in a Bay.

Amskeptic · Posted: Wed Jan 27, 2010 12:28 am Post subject:

MadMax78 · Posted: Wed Jan 27, 2010 3:21 am Post subject:

Thanks for the input everyone!

Colin, thanks for the measured data. I'm just going to mount it in the engine bay, judging by the opinions and data I think it should be safe. Proof of that will come once we reach Cape Town Laughing

_________________
1978 T2b ASI Riviera Plan I // Camper Special with MegaSquirt Injection & Ignition // 091 with 5.14 R/P and Peloquins LSD
Powered by Just Kampers, German Supply , Busted Bus, Aircooled Technology & DIYAutoTune
2008: Amsterdam - Beijing - Olympics -- 17.500km
2010: Amsterdam - Cape Town - FIFA World Cup -- 26.000km
2014: New York - Rio de Janeiro - FIFA World Cup -- 27.000km
http://www.oranjetrophy.nl
******************************************
Camper Special Club Member


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