GM Crate Engine ID Help
Thread Starter
2nd Gear
Joined: Jun 2019
Posts: 2
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GM Crate Engine ID Help
Hello all,
I'm putting a GM crate motor into my 1986 corvette, and I bought the motor from a person who identified it as a GM ZZ4 crate motor. However, the engine ID is different than a ZZ4. The engine ID is VF 196027. Can anyone tell me about the history of this engine? I'm trying to figure out the cam specs and bore so I can re-flash my PROM. I'd prefer not to take it apart, as this engine was never used. I called Speedway Motors, and they think it's a version of a GM 604. I have no issues using a 604, as this is going to be a show car and I've put a much better cooling system into the corvette and I ordered a custom TPI system from First TPI which is being built for the fast burn heads in the motor.
Thanks,
Joe
I'm putting a GM crate motor into my 1986 corvette, and I bought the motor from a person who identified it as a GM ZZ4 crate motor. However, the engine ID is different than a ZZ4. The engine ID is VF 196027. Can anyone tell me about the history of this engine? I'm trying to figure out the cam specs and bore so I can re-flash my PROM. I'd prefer not to take it apart, as this engine was never used. I called Speedway Motors, and they think it's a version of a GM 604. I have no issues using a 604, as this is going to be a show car and I've put a much better cooling system into the corvette and I ordered a custom TPI system from First TPI which is being built for the fast burn heads in the motor.
Thanks,
Joe
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
There is some info stating ZZ4 is stamped on pad. There is another stamping beneath #4 & #6 exhaust ports. It may id engine. It may require valve cover and pan removal to id components then compare what you to GMPP Component Chart to know what you have
