I know, I know, I have a problem...

I'm planning to L67 swap (or top swap) the Trofeo. But looks like there might be a bit of a snag. The Trofeo, being years ahead of it's own technology, uses the serial data line to share information from the PCM and BCM to the IPC.

Basically, from what I remember from my OBD-1 days, each PCM would transmit data on the serial bus in a specific format, and that format varied from vehicle to vehicle. In either case, it sounds like if I want to keep the cluster and digital display functional, it sounds like my PCM options are extremely limited to the one that's already in there. So no OBD-2, can't use the '93 SSEi PCM, etc.

I've found a single cryptic reference to somebody that had done it on an '89 or something like that. I'm still researching, cars like the Reatta and Riviera from this generation would run into a similar issue I'd think. So if any of you that still use the forums can recall one of these builds to give me something to go by, I'd appreciate it.

The original idea/plan for this build was to use the '93 L67 drivetrain I have, and either convert it to OBD-2 or use the '93 SSEi PCM. But none of the inputs to for the cluster gauges (except the tach) are analog.

_________________
Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

OK, a few builds I've managed to find thus far.

1st: LN3 top swap (kept the original computer and had a custom PROM burned)
http://forums.aaca.org/topic/79774-supe ... -its-real/

2nd: Series one swap and then series 2 swap. Looks like again, had the existing PCM tuned to work:
http://www.theautoshop.net/SuperchargedTrofeo.htm

Looks like people have been getting their OBD-1 PCMs tuned to work with the L67. I don't want to do that, but it's looking like it's basically the only option if I want to keep the electronics in the vehicle functional.

I'm thinking the only other way around this is to piggyback the Olds ECM, let it read the various sensors and think it's doing something, while the engine/trans are controlled by the OBD-2 PCM. I'd have to check all the wiring diagrams, I doubt I could get some functions to work correctly (fuel econ for example) but at least the dash wouldn't be hacked and/or loss of all functionality. But I'd have a far superior PCM.

_________________
Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

Does tunerCATs support it?

I wrote a guide on tuning OBD1 before but I think it got lost in the forum shifts. It's really not that bad.

_________________

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

So I found a post I made 10 years ago on w-body.com for the LQ1 but it might help:

https://www.w-body.com/topic/34441-obd1 ... ent-563549

_________________

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

I have seen people do insane things with Raspberry Pi's these days, and part of me wonder if something of the like can be set up to interface with your cluster.

_________________
~Randall~


1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place

I have thought about getting into OBD-1 tuning a lot over the last 15 years. I just didn't really know what I was doing, and back then the cost was too much. A quick glance at tunercat doesn't seem to have anything for the '92 toronado but I should probably do some real research there.

The problem with the raspberry pi thing is I have no idea where to even begin with that.

_________________
Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

So it's probably a 27C256 and you could probably run it off a L27 bin. I just don't know what that means for all the interface gizmos if anything at all.

I tune from a 94 L27 bin that I imported most of the L36 tables into. I also tune on the fly using an eprom emulator.

_________________

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

Yeah, I'd have to look into it, but what I think happens is that the ECM operates in some kind of 'data out' mode - perhaps the ALDL cover has a resistor jumpered pins to enable that - and the IPC looks for that message and just reads the data sent. The ECM OS should handle all of that separately from the actual tune.

Another thought, again my knowledge here is very limited, is could I take the PROM out of the '93 SSEi ECM and would it plug and play with the '92 Toronado ECM?

The last time I really did anything with these things was with the '86-'87 LG3 stuff, so my memory might be missing a few details. I had a crapload of different PROMs I'd grabbed out of salvage yards from basically every different computer/configuration that motor was used (Rivieras, Toronados, Cutlass Ciera, etc...) I had even grabbed most of the CRT system, and it's matching ECM/PCM from an '87 LG3 car (that I never got around to finishing), all in an attempt to diagnose why that motor never ran right. Of course, I kinda gave up with that and L67 swapped. But I thought I remembered that the PROMs were interchangeable. I'll have to check the Olds ECM and the CSM to see if there's any insight there.

_________________
Boost addict


The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

So the proms might be the same but the whole removable MEMCAL (memory calibration) chip might be different with a different socket at the PCM board. PROMS are sometimes soldered under the calibration chip on the MEMCAL. The w-body link gives an example of an adapter that lets you plug the memcal into it, has a socket for a PROM/EPROM and only connects the calibration chip portion of the MEMCAL. That way you don't have to relocate the cal chip to the bottom and solder in a socket.

_________________

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.