What are your thoughts on this car?

[Hudsy Wudsy]

No, those are the original exhaust manifolds. If I recall right everything about these engines were from the V6s except the block and crank. I don't recall details about the oil system.

[JACK M]

I meant the headers on the car in question.

The manifolds on the stock engine look to just be duplicates of the V6 as I would have expected.

[Hudsy Wudsy]

Sorry, Jack. I misunderstood. I don't know how many of you are familiar with these GMC V6s, but they were able to produce remarkable amounts of torque. They were really coveted by guys who hauled loads and, especially, those who drove in the mountainous parts of our land. They could be ordered in a standard GMC pickup. As far as the V12 version goes, I remember that they also found some use in industrial applications. I read about one that was used to drive irrigation pumps.

 

https://en.wikipedia.org/wiki/GMC_V6_engine

 

 

Edited October 23, 2017 by Hudsy Wudsy (see edit history)

[JACK M]

Makes a ton of torque and barely off idle according to the interview.

I don't remember ever seeing one of the twelves but remember a ton of the sixes.

Of coarse these were new when I was coming up. Don't see them much anymore.

I do remember that the V6 got terrible mileage. But could tow a load.

[Xander Wildeisen]

I think there is one right around the corner from me. Sitting in a parking lot, in front of a auto salvage company.

[Hudsy Wudsy]

If I were one of those who enjoys collecting and restoring engines, I think I might have one displayed in my collection. There were interesting and unusual engines, especially being made by one of the big three.

[JACK M]

I dug around in Hudsys link and there is a clip of it running.

Albeit is kind of far away.

[capngrog]

On ‎10‎/‎23‎/‎2017 at 11:32 PM, Xander Wildeisen said:

I think there is one right around the corner from me. Sitting in a parking lot, in front of a auto salvage company.

 

Is that the V-12?  If so, a photo would be appreciated (at least by me).

 

Cheers,

Grog

[Rusty_OToole]

One of the last gasoline big truck engines to be introduced, if not the last. Diesels were already taking a big share of the heavy truck market. The big GMC V12 was a powerful motor but got 2 -3 MPG which is why it never caught on and was phased out after a few years.

 

They made a V6 version too. The V12 had its own block and crankshaft but shared heads with the V6. The V6 was similar in displacement to a typical V8 but was heavier, torquier, made less HP and burned more gas. But they would haul a heavy load with no trouble.