It was mentioned in another thread that the 8.1L was going to be phased out. Is this correct? If so, what are GM's plans for a big block replacement? Will it be LS1 based? For that matter is the 8.1L LS1 based like the other truck engines?

 

Nope, bigger, better good ole Chevy Big Block!!

 

yes it will ,

think ls1 + 2

 

Are you sayin its goin to b say a 7l+ ls1 based motor?. I heard that the BB was dead because every one that wants to tow heavy buys a diesel. The BB sucks down more fuel and doesn't tow as well. I heard they were going to offer and newer dmax, a big small block v8 and about a 7l v10. But if you heard they were goin to keep the big block please do tell. I was afriad i was goin to have to rush and buy a truck before the next models come out so i can get the good ole BB v8

 

havent heard anything, we build mostly diesels at our plant, about 1 out of every 3-4 trucks somedays, but that doesnt mean they arent build at the other 4 plants... all in preference really, some dont like hunting for diesel fuel seeing how not every gas station carries it...

 

if i recall correctly, it is going to be a 10 cylinder engine. it's getting difficult to get any decent milage/emissions out of something with a 4.250 bore. that's why it's pretty much the last big block around.

 

Yes, it will probably be a 10 cylinder with cylinder shutdown technology.

 

that really sucks that gm would think about going to a 10 cylinder motor, dodge and ford both did it and both were/are useless gas hogs. the ford v-10 is JUNK, when i was working at home depot, the little rental truck had a v-10 and it was GUTLESS...gimme a big block or a diesel any day and i'm good if i have to tow anything.

 

well every one here loves their ls1 think of a 6.0L plus two cylinders 7.5L if you scale the numbers from the 6.0L 315 hp /380lbft you get 393hp and 475lbft torque. Combinrd w the new tranny's its apretty powerful combo. the 10cylinder makes sense, the BBC is a dinosuar and its not common with any other powertrain architecture.

 

After putting 58,000 miles on a HD with a 8.1 I can say I will never buy another one.The engine burned 103 quarts of oil and 4 gallons of coolant in the time I had it and was a dog for it's size.My Dmax would absolutely kill it in a drag race and gets about 60% better mileage.I read a HUGE article in GMHTP stating that GM is NOT building a v-10.Unless something has changed in the last 6 months GM will not be building a v-10.I don't know what the plans are for the 8.1 but it will not be replaced by a v-10.IMO a 425-440 ci LS1 based engine would work great.I would easily outpower a 8.1 and have better performance and fuel economy.