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OBD 1 to OBD 2 Conversion

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Old 10-13-2008, 05:48 PM
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OBD 1 to OBD 2 Conversion

Anyone know what is required for this? I have a 91 TPI 383 OBD1 and am wanting to convert to OBD 2. Any info/site would be appreciated.
Old 10-16-2008, 12:39 AM
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Car: 1991 Chevrolet Camaro RS Red
Engine: 305 V8 TBI
Transmission: TH-700R4
Re: OBD 1 to OBD 2 Conversion

why would you want to do this? I have OBD2 on two of my cars and i HATE it with a passion, but if you still want to convert it i would bet the easiest way would be to find a camaro that is 96 model or newer and take everything you need from it like the obd computer,oxy sensors, engine control module, catalyitic convertors, etc... seems the easiest way i could think of.
Old 10-31-2008, 03:50 PM
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Car: 92 z28
Engine: fast burn 385
Transmission: t56
Axle/Gears: 3.73
Re: OBD 1 to OBD 2 Conversion

or you could do what i and many other members on this board have done - buy the conversion wiring harness, a specific obd II conputer, new distributor, new coil, new coil module, new oxygen sensors, and a crank sensor (i think thats it) and do the swap outlined in the sticky in the tpi section. all thats left after that is tuning

and btw - i love my obd II camaro (or express van according to the new computer)
Old 11-01-2008, 02:44 PM
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Car: 1989 GTA
Engine: 5.0 TPI
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Re: OBD 1 to OBD 2 Conversion

What are the benefits of going to the OBD2 system? The main things I can think of are the faster speed of the computer and the sequential firing of the injectors as opposed to batch firing.
Old 11-01-2008, 03:09 PM
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Car: 92 z28
Engine: fast burn 385
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Re: OBD 1 to OBD 2 Conversion

Additional Benefits of the 01-02 LS1 PCM System
  • Optional Speed Density Only Mode
  • Improved Fuel Economy (Compared to the TPI ECM)
  • Supercharger and Turbo Control
  • Supports 1000hp Engines
  • Uses All GM Electronics
this info was stolen from eficonnection, hopefully no one minds i did this. there is also a chart i have, but i couldnt get it to properly copy into this post.

basically the chart said the 01-02 ls1 pcm does: Sequential Fire, Mass Air Flow, Speed Density, 4L60E Control, and 4L80E Control.

my tuning is not completely done and i can already tell it just has overall better manners. anything else just ask and i'll try to answer

Last edited by 92camaroz28ss; 11-01-2008 at 03:16 PM.
Old 11-07-2008, 04:19 PM
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Car: 1990
Engine: 305
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Re: OBD 1 to OBD 2 Conversion

I was looking for something else when I came across this. Here is something else you get. If you are in an accident, the police can plug into your OBD II site and download you speed as well as everything else your system was monitoring at the time it happened and for some time before, including breaking. Some states are even allowing for the downloading of information from the OBD II system for smog approval.
BUT THE BEST PART IS THIS - AND ITS ON THE WAY - THE POLICE WILL BE ABLE TO PLUG INTO YOUR SYSTEM AND WILL BE ABLE TO TELL IF YOU WERE SPEEDING AND THEN GIVE YOU THE TICKET, EVEN THOUGH THEY DID NOT SEE IT. They will just be able to say they saw you do something and as part of a "reasonable" stop, and consistent with the Supreme Court ruling that everything in the passenger compartment can be searched, they will just take a look at what you have been doing for the last hour or two.
they can also trace where you have been.
what you really need is a power shutoff valve to the computer which will shut it down for 60 seconds if you are ever stopped or you get into an accident and wipe out the history.
and yes i am an attorney and i practice in the area of criminal law.

Last edited by tony_cogliandro; 03-13-2009 at 10:29 AM.
Old 11-08-2008, 10:57 PM
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Car: 1991 Chevrolet Camaro RS Red
Engine: 305 V8 TBI
Transmission: TH-700R4
Re: OBD 1 to OBD 2 Conversion

thats a load of bs you should be able to do whatever you want to with your car you payed for it out of your pocket, that means when they hook up to it and see youve been on the dragstrip they can ticket you for that too i guess, i used to know a guy with a f250 diesel he said if you ran it above 100 mph it would shut the truck down and the ford place had to get it started back in which case they would ask why were you speeding that bad? INVASION OF PRIVACY ON PERSONAL PROPERTY is all i have to say it may not stick up in court but that should be against the law.

BTW love the switch idea.
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