yes a turbo V6 will make more power than the stock NA V8 but turbo said V8 and I bet you'll be making about 100 more HP than the V6.
GN turbo
Thread Starter
Drifting
Joined: Jan 2001
Posts: 1,396
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From: Mickleton NJ
GN turbo
A friend owns a GN repair shop, and I was talking to him about replacing the valve seals on my 87. He told me he had a built up V6 turbo, sitting in his shop, and I should install it in my 87. He also told me he has done about 6 of these. Has anyone here done this swap, if so any problems. He showed me time slips from a 90 Vette he done, it was running mid 11's. I'm not a racer , just a cruiser. Purists stay out, Jim.
Team Owner
Joined: Feb 2006
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From: sw Ohio
Burning Brakes
Joined: Sep 2006
Posts: 1,202
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From: MD
There was a video one time of a guy auto-crossing a C4 with a GN engine. It was sick. The engine is lighter, and is positioned more towards the center of the car allowing a better weight distribution. The car was really quick. I'd say do it.
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Can a V6 handle the 700R4?
The GN and GNX came with a 200R4
Now I wonder, any tranny Gurus? Can you explain the diference 700R4 Vs. 200R4?
Pontiac installed the Buick V6 Turbo in the Trans Am, it was for one year only. I cant remember the year.
The GN and GNX came with a 200R4
Now I wonder, any tranny Gurus? Can you explain the diference 700R4 Vs. 200R4?
Pontiac installed the Buick V6 Turbo in the Trans Am, it was for one year only. I cant remember the year.
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Melting Slicks
Joined: Oct 2006
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From: College Station TX
Instructor
Joined: Jul 2007
Posts: 222
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From: Toronto(Don Mills) Ontario
Yes, I remember those cars - don't know if any of them were available from GM Canada? Seem to remember there was some discussion at the time(1988/99) of Chev/Corvette installing some of the GN turbo motors in a Special Edition C4 Vette? Don't believe anything ever came of it, tho?!
Team Owner
Joined: Feb 2006
Posts: 24,460
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From: sw Ohio
As far as the engines go, stock for stock, the LC2 (turbo 3.8 L V6) runs on premium gas and gets worse gas mileage than the vette. Just another thing to think about. I had a friend who owned one and he complained that it barely got 20 mpg on the highway.
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Pro
Joined: Oct 2005
Posts: 721
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From: Charlotte NC, behind someone going 10 under the speed limit
From experience of currently owning both an 86 GN and an 88 C4, I wouldn't do the swap. The turbo lag would drive a C4 owner nuts, and yes it would get worse mileage. I can't pull down 20 mpg with mine, and it's mostly stock. Not to say that I don't enjoy the car, it just kind of belongs in a Buick.
The GN motor isn't as kind to the driver as a TPI motor, you have to kind of time the throttle just right, too much at the wrong time and it'll respond slower, it's finicky like that.
The GN motor isn't as kind to the driver as a TPI motor, you have to kind of time the throttle just right, too much at the wrong time and it'll respond slower, it's finicky like that.
