Tech 1/2 vs diagnostic/tuning software..
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, Tech 1/2 vs diagnostic/tuning software.. in Past Cadillac Vehicle Discussion; As the clusterf*** that is my fuel pump comes to a close (should get the car back on Monday), my ...
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    Poda is offline Cadillac Owners Fanatic
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    Tech 1/2 vs diagnostic/tuning software..

    As the clusterf*** that is my fuel pump comes to a close (should get the car back on Monday), my thoughts again return to the plans I have for the car..

    As it stands, I'm now in a position to start looking for bi-directional PCM diagnostic/programmers. Question is, do any of you have experience with the Tech 1/2's or aldl connector/software combos for an OBD1 '94? My base tune when I'm ready will be sourced out, but I'd like to have control over the inevitable fine tuning and slow "upping of the ante" that'll be required. I'd actually prefer a PC based solution since I'll be integrating one into the car, but both will work depending on reliability. PC software doesn't necessarily need to be free - I don't mind paying for something that gives me control, but I also don't want to spend an arm and a leg doing so when a Tech1 can be found as cheap as it can with a little bit of research.. That said, a good software package that lets me visualize guages on a screen without looking "cheap" I'd pay more for..

    I realize this forum is more about the preservation of these cars and not the massive hot-rodding plans I have in mind, but I figured it wouldn't hurt to ask.

    On a side note, if anyone has a lead on a LT1 4 bolt main block out of a truck within reasonable driving distance from central southern ontario, I'd be *very* interested in finding out the details.. The more stripped it is, the better - I can't use any stock components..

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    jayoldschool is offline GM RWD V8 addict
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    Re: Tech 1/2 vs diagnostic/tuning software..

    Last part first. LT1s never went in trucks. The only 4 bolt blocks went in Vettes and SLP F bodies. The Impala guys have proven two bolt blocks are fine well into the mid 500hp range. Scanning/programming. I use a cable from AKM, my laptop. Software: Freescan, Datamaster (both to scan and log). Tunercat to read and program the PCM. You can do much more with that than you can do with a Tech 1/2. Google those three pieces of software, and you'll see what they can do.

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    Poda is offline Cadillac Owners Fanatic
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    Re: Tech 1/2 vs diagnostic/tuning software..

    I guess I misread this.. I was reading up on Joe Alameddine's motor since he's closest to what I'm shooting for in the long run.. I've since found more details on the block used.. One can dream

    "Starting with a four-bolt-main truck block (the two-bolt-main stock LT1 block was ditched), ..."

    Thanks for the heads up on the software.. So far it all looks good.. TunerproRT seems popular with the camaro guys too..

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    Poda is offline Cadillac Owners Fanatic
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    Re: Tech 1/2 vs diagnostic/tuning software..

    Ordered the cable.. narrowing down the software but it looks like I'm going with what you recommended..

    That said, do you know if there's any improvement to be had on the factory tune? Either from a mileage -or- power perspective? I assume these tunes tend to be fairly conservative from the factory

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    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: Tech 1/2 vs diagnostic/tuning software..

    Yes, you can improve either way. My SS runs a power tune for 91/93 octane with advanced timing (among other parameters). A good way to get going is to compare your stock tune to modded ones to see where the differences are. There are lots of things to play with...

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