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Print in friendly format Send this term to a friend  Rat Motor
GM production big block engines were known as Rat motors.

'W' Series:

5.7L 348ci - 1958 thru 1964
6.7L 409ci - 1961 thru 1965
7.0L 427ci (Z11...
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Re: ADLD Cable 84 Corvette

Subject: Re: ADLD Cable 84 Corvette
by anesthes on 2008/9/22 1:57:01

Quote:

bogus wrote:
you are not going to do any tuning for the 84 via the cable. all you will do with the cable is read... and if you are not careful, the older ECUs can bog down from being scanned.

There are ECU upgrades available... from GM of all places. The later vintage truck ECUs, with a little bit of wiring mods, will work great.

You see, the 1984 ECU ran at 15 instructions per second (IPS), whereas the later truck unit ran at over 150 IPS!!! That improvement will really help with tuning.

I am sure others more knowledgeable than I can help you better.


Have a source for those numbers?

The later stuff ('730 ECM for example) is based on the 68HC11 processor. While the clock is 2mhz (2 million cycles per second) the instruction set takes different amount of cycles per instruction to execute. While on average it takes about 3-4 cycles per instruction, that leaves an average of about a half million instructions per second.. Compared to 15 and 150, that seems. Light years faster.

-- Joe
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