Interesting the ConsumerGuide published in 12/88 mentioned the turbo 6 was a test engine for the ZR-1; as stated too rough
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Originally Posted by alwayscode390
He contacted the SVI people , they gave him the first pic I posted. They verified that they were building these engines for a Corvette prototype. The turbo lag and the engine shaking of the unbalanced 4.3 was too much hassle for GM to approve the design. Im not sure if it was ZR-1 specific though ... but the year "1987" seems feasible.
He originally bought it thinking it was a SYCLONE/TYPHOON prototype engine , but its too big to fit in the s15 body ---
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