8.1 Vortec Engine

[Anubis]

Looking for a good used 8.1 for my brothers beater truck. He bought the thing dirt cheap and now we know why. Cylinder one measured 5 psi in a compression test and the engine missed. Check out the carbon in the exhaust manifold…lol. This engine was supposedly rebuilt. Obviously by an a$$ clown. Looking for some thing that is fairly Local to West Michigan. Thanks for looking.

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[RichLo]

That sucks, It must have been running like that for a while with that kind of buildup in the exhaust.

Good luck finding an 8.1 used for a reasonable price.

You can still buy 7.4, 8.1 and 8.8's new as they are still used in industrial generators.

 

[RichLo]

Vortec 8100 8.1L Chevy GM Performance Parts - 496cid BBC Truck / SUV Performance Packages - Raylar Engineering

Vortec 8100 8.1L Chevy / GM performance parts. Raylar 496cid truck and suv performance kits and performance packages.

www.raylarengineering.com

 

[stutaeng]

Yikes! Is that piston broken? That seems like an expensive fix. I've got one in my backyard mated to a 5 speed Allison...bought to swap into my K3500, but hasn't happened. I forget it exists unless I'm mowing the yard, LOL.

I think there may be a FB group on these engines?

 

[someotherguy]

Too bad you're so far away. There's one on CL in Houston TX for $1500 still in the truck claimed as perfect running, presumably you could confirm before buying. It's in a heavy duty truck so there may be differences.. typically those engines are somewhat detuned compared to light trucks, for longevity purposes.

Richard

 

[618 Syndicate]

That sucks, It must have been running like that for a while with that kind of buildup in the exhaust.

Good luck finding an 8.1 used for a reasonable price.

You can still buy 7.4, 8.1 and 8.8's new as they are still used in industrial generators.

What's an 8.8?

 

[someotherguy]

What's an 8.8?

8.8 baby! https://psiengines.com/products/8-8-liter-transportation/

Richard

 

[618 Syndicate]

Yeah, I googled it, just not sure how it's relevant to a 454/496?

 

[someotherguy]

Yeah, I googled it, just not sure how it's relevant to a 454/496?

It's the modern version, for lack of better term, of the 8.1. PSI has been a GM industrial engine supplier since the 90's (or longer?) and have continued production of larger-than-8.1 engines based on the 8.1 design. I believe they still offer new 8.1's also. I guess the person that originally brought them up, the point is, 8.1's are still being produced and used although GM is through selling them.

Richard

 

[618 Syndicate]

Gotcha. I didn't find any information about how the PSI 8.8 was related to the GM motors.