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We have a 1994 corvette. But it does not have a maf sensor and it has head casting numbers 10128374. I am thinking it
has a 92 engine in it. Does that sound right? Do the head casting numbers prove this? Any way else to tell?
Thanks for any help.
If it has a mass airflow meter, it will have an older style ecu. In 94, the ecu design was changed. What does your ecu look like and do you have any pictures of the engine available?
It’s possible that it’s still a 94 engine that has had the MAF deleted. Tuners can remove the MAF function in the PCM and switch over to speed density. This is sometimes done when significant engine modification puts the stock MAF out of range to function under increased airflow.
OK went and worked on the car today. Things I learned. Engine code is V1029ZWB. From my research that says it is an
94 Corvette engine with a manual transmission. However indeed it does not have a maf sensor and does not have any
connector to plug into a maf sensor. It has the older type computer like from a 92 or 93. So I am guessing someone
converted it to a non maf engine for some reason. I read somewhere that 94 models had OBD2 connectors but were really
only OBD1 computers. Not sure if that is true. This car as an older OBD1 connector. Oh, I could not find any id # stamped on
the edge by the oil filter. I guess it was possible that it was filled in with black paint but I could not find anything. The engine code
I found was on the passenger side flat area in front of the head. So I guess it is a 94 engine, converted for some reason.
Thank you all for your responses.
1.) It would be good if someone with a known Corvette LT1/4 'out of car' would post a very good image of the VIN Derivative. Regardless a Corvette LT1/4 the first 3 digits of the VIN Derivative would be 1X5xxxxxx with 1=(Chevrolet), X=N(92),P(93), R(94), S(95) or T(96) and 5(BGR) followed by xxxxxx(sequence).
2.) A production '94 should have a 16 cavity DLC regardless.
I know your The King and are never wrong, but Bowling Green doesn't stamp Corvette engines in the same location that St Therese stamps Z28 Camaro engines.
I never said they did and I only use that image so that people understand a VIN Derivative. A few years ago you called me out regarding VIN Derivatives also. You were wrong then.
didn't flint build all LT-1 engines. they would have stamped the assembly date and suffix code at the same location. the final assembly plant would have stamped the vin
I am fairly certain that the service manual shows the location of all of this. plus I know the NCRS judging manual does too.
Today someone dug up an old thread started in 8/2008 and a 'one time' poster in 7/2021 posted this image that was found on a '94 LT1 and very likely I believe a 'vert with this VIN: 1G1YY32PXR5116404. I deleted the F body image I had posted earlier just to clean up the thread a little. Now if someone had an LT1 from a B-Body full size car and could confirm it's VIN Derivative location with a snapshot I believe it would be safe to say it would be quite easy to know the source of at least the block.
94 engine question
