whats all needed to convert an earlier lt1 to the obd2 other then a wiring harness and ecm/pcm

will 350 headers work for the lt1?

what should I pay for an lt1 style t56?

 

Sorry I cannot answer the first question. I know PCM has to talk to the ABS system, the VATs system, the airbag system, the instrument cluster (dash) and the body control module. One major factor would be what year you are starting with. The later 95’s are very close to OBD2 but the 93 are completely different. If you are not really good with electronics just plan on swapping everything in the dash. There is some differences in the opti also. Maybe some of the engine wiring if different.

As for the headers, the LT1 is basicly a 350 so any SBC header would fit the motor but header MUST be designed to fit a 4th gen camaro/firbird. There is very limited space, even some headers that are designed to fit our cars may need some slight tweaking to not rub somewhere.

You are going to pay $1000-1500 for a Lt1 T56 complete kit. I have seen just the trans sell for $800. Don’t forget you need a manual PCM and harness or you need to reprogram the computers to make it all work without a check engine light.

 

In addition to what Gorn mentioned, a new sensors was added in the 96 model to make it OBD2 compliant, in particular the Crank Position Sensor. The only purpose for this sensor in the LT1 was to detect misfires. This addition required changes in the front cover where the sensor is mounted, and a different optispark drive.

 

its not going into a 4th gen.

where would the cps go? and what are the other sensors I would need?

 

Or to simplify things a little bit, you could buy a new intake manifold for the LT1, one that has a distributor hole in the back, stab in a conventional distributor, and abandon the opti.

 

is there one that still uses the lt1/lt4 intake style?

 

To avoid going off track with thought, it might help to know what you're putting the LT1 into, because I may not be thinking you're going in the same direction that you're thinking of? If you want the engine to work as is (current FI and opti), but not in an LT1 car, you're going to need to use the LT1's PCM because the opti is unique in that it reads crankshaft position to control spark timing to the computer.

 

its an option for a swap for my 82 camaro. I know I'll need the pcm/ecm and wiring harness for the engine. I want the obd2 version because 1 its a lot easier to tune and get info from the pcm and 2 theres no 'relearning' phase for new parts. but i know the obd1 lt1 is more plentiful then obd2 lt1s.

 

Ok that helps, wasn't sure if the engine was going into an OBD 1 or 2 car. The LT1 itself isn't either an OBD1 or OBD2 engine. What makes the 96-97 OBD2 compatible is the additional crank position sensor in the timing chain cover. So a 96-97 LT1 can be put into a 95 and older F body, you just wouldn't hook the sensor to anything since the car's system has no provision for it. The new style (vented) optispark is the same between the 95-97 F body cars. The 92-94 optispark has a different drive mechanism in how it attaches to the cam, and the cam in these years are different as well. However, all the optisparks operate the same way, mechanically and optically. The difference between the two styles is in how they're driven off the cam. If you wanted, or needed to, you can change the cam and timing chain covers to swap between the 2 different opti's (use the old style opti in a car that had the new style, and vice-versa).
You have a couple few options, change the intake manifold and convert the engine to carburetor using a conventional sbc distributor or,
Have your present intake manifold drilled and converted over to use a conventional distributor (yes that's been done a number of times). Then use a TPI PCM with a tune to control the FI or,
Keep the LT1 as it is and use the corresponding PCM and wiring.
Something more for you to think about. My 92 LT1 Vette is OBD1, as is the 93 Vette and Camaro. So, you have no reason to have to convert your 82 Camaro over to OBD2, there are OBD1 LT1 options.

 

i would think a 93 pcm would work best with a 3rd gen. you still have pretty much the same transmission and the prom setup is very close to same.