It is my understanding that the 93 camaro/firebird LT1 computer still has a prom. If this is so, then could a person use this computer to run your TPI motor. If this could be done, then you could have sequential port, electronic tranny, and a wide band O2 sensor. Also you would be able to do real time tuning.

I don't know much about the 4th gens, so I could be completely wrong.

 

The 93's are still ecm's, they don't control the trans so they're not considered a pcm even though they look similar externally to the 94-95's. They do however need the optical sensor for crank position so that would be another PITA. Then there's the sequential issue. 93's aren't sequential, they're batch, 94 and 95's are sequential. None of the ecm/pcm's from the factory support a wideband o2 sensor unless there is a patch out there that I an unaware of.
You can do real-time tuning with 93's and pre-93's like the 7730 and the 165, heck, all prom ecm's can be tuned with special off the shelf hardware but the 94 and 95's are a little tricker. They have built on flash memory so to do real-time tuning you would need to remove the flash chip, solder on a socket, use an adaptor and then an emulator. I don't knoe if it's been done but that's how you would go about doing it. I don't see any issue with it either except again, nobody has publically done it.

 

It was just a thought. Like I said, I don't know much about 4th gens.

 

It was a good thought! Installing an opti under a distrib cap, running a 94/95 pcm, removing the flash chip and installing a prominator pro... now that would be a great setup for todays more modern EFI engines.
I too don't know much about 4th gens, only what I HAVE to know .

 

"Installing an opti under a distrib cap"

kind of like the pic 83 Crossfire TA has posted here?

https://www.thirdgen.org/techbb2/sho...ght=opti+spark

 

If it is possible to put a prominator on a pcm the why not try an LS1 computer. This would have all the advantages I listed plus distributorless ignition.

 

LS1 computer? We're talking about the 93-95 ecm/pcm's. I don't even think the LS1 pcm's are made by the same company (not to mention OBD-II vs OBD-I)

 

So 94/95 pcms aren't OBDII.

 

People are starting to real time tune those through the CAN bus, if this takes off no need for a prominator.

 

Unfortunately there are a few complications with "emulating" the flash PCMs. Things like:

1) 16 bit - means either 2 8 bit emulators or a 16 bit emulator is necessary (coming soon!)
2) Potential code hacking required to emulate (namely the code that verifies the flash chip manufacturer on power-up, thereby preventing socketing with an emulator or another brand flash chip).

And OBDII CAN tuning issues:

1) Not real-time (to the best of my knowledge).
1b) Requires a shut down and very, very stable voltage to the computer.

We'll get there. We've still got miles to go with what we're currently focused on in these forums! The technology and growth are exponential...

 

I think I've totally hijacked this thread, sorry but this is good stuff

What do you know about the 16 bit emulator? Is someone making one, and any ideas on the wait?


All I know about the CAN tuning is what I've read on other forums, but its modified code to allow it to be real time, possibly modified hardware too, it wasn't very specific.

http://www.ls1.com.au/forum/showthread.php?t=41986

 

Are you talking about the 94/95 pcms? Are they 16-bit and the 92/93 Lt1's are 8-bit?

 

thats correct, they use a Intel AN28F512 flash rom