Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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He bought it not knowing what it was, but eventually figured out it may have been one of the test engines for the 4.3 Turbo v6 idea GM had for the ZR-1. He was going to stuff it into another car, but it just sits in his garage for the past 3 years.

Figured you guys would be interested in it ... so I snatched up all the pics he sent me awhile back. I just remembered it lastnight :) ---

Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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Some marking on the turbo.
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Some markings on the IC.
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Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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These might give you guys some ideas for making some log manifolds.
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I found 2 oil pressure units. One for a gauge & one for an idiot light?
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Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

Well the top plenum is very L-98ish however it looks like a cross between a Buick. GC

Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

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 ---

Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

Im thinking this might have been a bad marriage between GM and the Buick Grand National Program or Turbo Regal V6 Arena. Turbo is in the right spot however the intake is way off hence the marraige comment (More like a shotgun wedding here)

Time period is also about right. Who knows what evil lurks in the hearts of prototype engineers.

Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

It may have been for a Corvette prototype but not for a ZR-1. There was no indication in The Heart of The Beast that there was ever a consideration for a T-V6 in the ZR-1 that I remember.

Re: Is this a v6 Turbo ZR-1 Prototype Engine? Friend purchased it (pics) ---
 

I thought I read somewhere that the turbo v6 was an option ... when they were shooting for 400hp ... but people really took it hard that it wasn't a v8 for the "top of the line" Corvette (zr-1) , so that's another reason it was squashed ? ---