[Diy_efi] Project/temperature ranges

[gassr]

How does the temp range for 'commercial' differ from 'automotive'?
I'm led to believe 'automotive' is designed to function within a wider
range of temp variation, with both a lower -?C and higher +?C. If so,
why deviate from automotive application norms?

Gary

----- Original Message ----- 
From: "Alex Ruiz" <arsoftware at gmail.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, February 27, 2007 6:13 AM
Subject: Re: [Diy_efi] Project/temperature ranges


> Even aftermarket ECUs from Magneti Marelli and Maclaren Electronics
> are comercial temp range.
>
> I'm developing an aftermarked ECU and in the beginning I had a great
> desire to use fully automotive parts. Quite easy to select the
> components but almost impossible to buy then in small quantities down
> here in Brazil.
>
> 2007/2/26, Bill Lewis <bill at wrljet.com>:
>>
>> I've disassembled and reverse engineered a number of ECUs over
>> the years and many do not use anything beyond commercial temp
>> range parts.  Just FYI.
>>
>> Steven P. Donegan wrote:
>> > For the moment I am working more on function and less on boundary
>> > conditions - ie I am working with commercial temp range parts and
>> > 'reasonable' power supply fluctuations. Once the system works in those
>> > conditions I will indeed go to automotive/military temperature range
>> > components and expect zero goodness from vehicle power :-)