GM Vortec 8100

Wolfman

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I'm about to start the search for a 2500/3500 or an avalanche with one. Anyone have any experience with it?
 

OffshoreDrilling

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they suck gas like craaaazy but make insane torque. something like 500ft lbs at 3500rpm. I have one in my boat. Very reliable motors.
 

Outlaw

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They're good motors, but as Jared said, don't expect anything more than 10mpg if you're lucky.
 

EmersonHart13

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8.1 is easily one of the best gas powered towing motors.
 

IceCreamAssassin

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I drove one for about 2 years, best truck I've ever owned. My father also used it to tow his 28 foot boat. I suggest you get a pick up and not the avalanche. The Avalanche did not come with the Allison transmission, but the pick ups did. Makes a huge difference. Also I did average 11mpg towing or not lol.
 

Wolfman

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I'm not worried about mpg. I don't have a long commute. I just want a toy to piss off my coworker. Lol. He has a 2013 Harley f150 with some loud, shitty exhaust. An 8100 with straight pipes should silence him. LOL
 

IceCreamAssassin

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The stock muffler is HUGE, I tore that shit out and welded in 2 magnaflow mufflers. Sounded beast afterwards.
 

Wolfman

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There's a company out there that mods them. After owning a vette, their prices look pretty reasonable too. Raylar is the name I believe
 

nick122590

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if I wasnt stuck on ls powered vehicles I would have found my truck with an 8.1 and Allison.
my buddy has the same truck as me with it and it does tow like a champ. he put long tubes on it with straight pipes literally going straight back from each header. its the only vehicle ive ever liked straight piped. rumbles like a damn Harley at low rpms
 

Wolfman

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The 8.1 has LSx style heads and the LSx firing order. ;-) it's like an LSx big block!

I found 2 local ones. An avalance for 9500 and a 3500 dually for 11.4k

Both have 120k miles

 

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