Project MULE - 350 Vortec Tuned Port Injection build on 91 Suburban.

[pma4x4]

In regards to the 7730 ECM. I know I can find it in the umpteen billion GM cars. but if I dont get it out of a TPI V8 I will have to reburn the chip before trying to run correct? Then run it then email the log to Eaglemark then get a new burned PROM.

Also, I know I have to grab the yellow connector and a good amount of pigtail wire with it.

You guys said I have to "re-pin" the connectors between my existing 2 to the new 3 connectors. Is there a map or picture, something that will help me in the repinning.

Also is there a tool I can get to assist in proper pin removal of these connectors? I have a pin removal tool for the metra-pak 280 series but that's it.

[JeepsAndGuns]

if I dont get it out of a TPI V8 I will have to reburn the chip before trying to run correct? Then run it then email the log to Eaglemark then get a new burned PROM.

Correct. Also, a V6 memcal will not have the correct knock filter or limp home chips in it. There are some jumper wires you can do to make it work with a V8, but from what I read the knock module will still not be right.

[pma4x4]

So best to find a 7730 out of a V8 then. Anyway I can find a list of vehicles that would have that ECM?

[JeepsAndGuns]

Not 100% sure, but I think the 90-92 V8 camaros are about it. Maybe pontiac firebirds? Not sure though. They pop up on ebay every now and then, but usally big money.
The V8 memcal would be the best, but the V6 memcals can be made to work if you dont want to spend the coin for a V8 one. Do a search on here, I remember reading some threads on here talking about the V6 to V8 memcal mods for TPI systems.

There are other options avalable. Not sure if you would want to do it or not, but a 16197427 pcm can be modded and tuned to run batch fire MPFI. Dont really see why a TPI intake/fuel system could not be run by it. Not to mention, it would make it to where you could swap in a e-trans in the future if you desired. They are also much more easy to find with a V8 memcal. Usally somewhere in the $50 range, where a V8 7730 would probably be closer to $200-$300 (based on what I have seen)
I am running a MPFI system with a modded 7427. There were a few initial tuning quirks, but I have it running real nice now.

[RobertISaar]

90-92 TPI 5.0/5.7 and only in camaros and firebirds. not a whole lot of them left that haven't been picked over at this point either.

if they're easier to find...... you can use the external knock filters used with the 86-89 TPI cars that was used with the 1227165 ECM and then use the 86-89 MEMCAL with it. but i really don't know how common those are at this point either.

[pma4x4]

If that's the case i may just get a new remanned. AC delco is only $147. and A1cardones are $99.

[JeepsAndGuns]

Reman ecm or memcal?
If its a ecm, it will not come with the memcal.
I have never seen a reman memcal, but I have been surprised before.

[Six_Shooter]

Reman ecm or memcal?
If its a ecm, it will not come with the memcal.
I have never seen a reman memcal, but I have been surprised before.

ECMs from parts stores do NOT come with MEMCALs.

[pma4x4]

OK so if I get one used how do I know if it has the memcal? Is it that memory slot looking thing I see in the parts store pics?

[EagleMark]

That memerory slot will be filled with a Blue Memcal. Be prepared to spend a premium price for a TPI Memcal!!!

[pma4x4]

Well wait. from what I was getting here is just go find a 7730 out of anything and then burn a new prom for it.

Flat out, If I go yard hunting what do I need to find?

Or I could just a get used prom which I assume has the memcal on it? It looks like its piggyback?

http://tpiparts.net/82_92_camaro_ecm_and_prom?b=1


Ah hell! I am just confused on this. Can someone just post some pictures so I can get what we're all talking about?

[JeepsAndGuns]

OK, the ecm does not matter what it comes out of, as long as it has the service number 1227730. It is the memcal that has all the important stuff on it, its what determines what engine the ecm will run. It has the PROM, the knock sensor board, and the limp home chips inside it. In the link you posted, its this part here: http://tpiparts.net/inc/sdetail/10935/476
It has the broadcast code of AUJP, and as you can see, quite expensive because its the factory 350 V8 memcal.

[pma4x4]

I would get just the PROM back from get from Eaglemark with the correct burn? I am guessing the prom is the larger chip beneath the flat board which I assume is the knock sensor board?

memcal.jpg

If I do find one on a yard. I know it has to be 90-92. are there any other specifics about the car I need to know. can it be a manual or auto? can it have or not have A/C?

[pma4x4]

On a side note I just picked up another pile of TPIs. a full TPI unit from a corvette (85-86) standard head bolt pattern. and a spare unit minus plenum for F-body heads. It was a good 4th of July. $120 for both. already sold one of the throttle bodies and this just saves me spending the 400 on the Scoggin Dickey intake manifold!



engine-006.jpg

[Bigdav160]

That memerory slot will be filled with a Blue Memcal. Be prepared to spend a premium price for a TPI Memcal!!!

Ok, so what are the options? I'm newbie with the ECM/Prom combos myself. EBL? The Aussies seem to be using some type of flash chip? What about a memcal from something like a 4.9L Cadillac? I have a pile of those someone gave me.

No to bogart on pma4x4's thread but one of the reasons I went MS with my Suburban project is a 01227727 ECM on my workbench has no prom.

I also have a '73 Z28 with a TPI with a 16198259 AKFX ECM. Is there an (easy) option to go speed density and get away from the MAF?