GM offers an 8.1L (496 ci) fuel injected, gas powered beast in its HD truck lines. It is a step below the duramax as far as engine package prices go. To date I have not seen any articles about stuffing this engine between the fenderwells of anything cool (Chevelle, Firebird, Camaro, Impala, etc). I was reading on another blog that the 8.1 will accept old school big block chevy (BBC) motor mounts and headers and that the block itself has nearly the same exterior dimensions as the classic big block chevy. So its the modern incarnation of the classic big block but with the efficency and reliablity of fuel injection. Why haven't there been any articles? Why is the parts market so minimal?  

YAWN.  295 anemic ponies . . . peanut ports . . .  440 lbs/ft torque . . .   not beastly, Homes. (Possum, maybe)

 http://www.chevrolet.com/mediumduty/kodiak/c6500/specifications/

 An no way the IM Man's gonna miss one in '75 or newer whips w/o some dead prez o' other benes.

Th' mags are overstuffed wif BBC 411-- mo than J LO booty packed in a Size 0 Body Glove.   So no need for Dump Truck Craft to spill all on the "beast" 8.1 lump.  Chevy ain't all that no mo.

hay   chevysxz

y u type  like a fool!!!!!!!!!!!!!!!!!!!!!!  yo!!!!!!!!!

it that what they teach u in school........fool

that #### maybe cool in tha hood yo  but out of it it sucks....

you'll learn....  and on boards you're out of tha hood....

so bro..  get it together and type like you would for a resume!!!!!!!!!

440ft  is beastly... it's a truck engine  low end pulling power is what it's all about... 

so chevy should've put a 460 hp  high winding powerhouse in a truck that needs(wants) low end power so you are not to "yawn" 

think before u post   "homes"!!!!  cause when  g.m. builds a crate engine off this thing  it will wipe that  YAWN off your face....

what you think this thing would do with the 502 heads an "DR" big cube turbo motor" build up...  rock all you's ricers right off the planet!!!!!!!!!

o k  "G" 

P S   most of the 454 running around are truck engines that had peanut ports and no high  hp  #'s stock....but kick you a$$ into a seatback  now...

"what you think this thing would do with the 502 heads an "DR" big cube turbo motor" build up...  rock all you's ricers right off the planet!"

Conservatively, about 1075 horsepower in a streetable form.

Assuming a 95% volumetric efficiency at 6200 rpm (possible with aftermarket heads and hydraulic cam), 75% turbo efficiency, 70% intercooler efficiency with a 2.5 psi drop (fairly restrictive), air/fuel ratio at a safe 11.3:1, BSFC at a conservative 0.6 lbs/hp, no nitrous oxide, and a 200 cc/min. mist of a 50/50 mix of methanol and water (just to keep it safe), the 8.1 would consume approximately 120 lbs/min of air (1600 cfm appx.) at a pressure ratio of 2.19:1 and a density ratio of 1.91:1 (corrected for standard temperature and atmosphere (gauge pressure 15 psi).

It'd need a pair of T76 turbos:

Up the boost into Supra-land (30 psi) and, if the engine holds together, the T76s could boost the 8.1 to over 1500 hp on race gas.   Better volumetric efficiency could measurably improve the results (but increases in VE and intercooler efficiency would take it outside the range of the T76s at competition boost levels).

no way in hell that be cheap  but shure would be  fun!!!!!!!!!!!!!!

it  hold together you'd need to  O ring the block tho...

You could cut back to T70s and slide by with a couple of Brazilian Master Powers for around $1500.

Or if you weren't ever going to crank up the boost you could use some cheaper TO4B 62-1s

that would be a blast in my caprice....make that 2tons of steel scream.....lol

1075 hp in a 4000 pound car theoretically is good for 150 mph in the traps.   Of course traction, aerodynamics and gearing can negatively affect trap speed.

Some have suggested my calculations above are too conservative considering that drag cars commonly exceed 100% VE naturally aspirated in narrow RPM ranges.

For example, Butler Performance Group has pulled some amazing numbers on both racing gasoline and alcohol with turbocharging on an aftermarket block/head 440-cube Pontiac:

"In addition to building a 440ci, 2,200hp, gasoline-burning twin-turbo Pontiac V-8 . . .  they have also built up the world's most powerful traditional Pontiac V-8 yet assembled."

"Rodney Butler and his partner Travis Quillen have pulled a staggering 2,886 hp at 7,200 rpm, with 2,105 lb-ft of torque at the same level. The torque curve was equally astounding, with over 1,900 lb-ft available up to 7,600 rpm. The horsepower stayed above 2,700 up through 7,800 rpm. Travis added that, 'We would have liked to pull the engine a bit lower, but the dyno simply would not hold this kind of torque. I would imagine that torque at 6,500 rpm would be in excess of 2,250 lb-ft, but of course we have no real way of knowing for sure.'"

http://highperformancepontiac.com/tech/0410pon_butler/

Methanol is, of course, the secret to why alcohol funny cars and TADs can make such big power with a 50% efficient Roots blower and how  four-cylinder Offenhauser turbos made over 1000 hp at Indianapolis in the late 1960s.

nice  my 70 chevelle is a 496  (in the building stage of car)  this might be fun...  tho  I'd need new pistons as mine are 11:1 to high for a turbo...

may go efi(maybe  read "BIG  IF" )  looking into it now..

where or  what books would be good reading  for turbo set ups ...

might need to read up...  .. 

this would be down the road some  as my budget will not let me change out most of what I have already bought...  but I tend to get hungry(power hungry) not long after my set ups are dialed in... 

but need to read up on it first...  as I'm not into the j/y turbo build up for this car...  the donovan block and other parts cost tomuch to have a used part fail... 

any sites you'd recomend for good info..(not hearsay) 

I find chevysxz's posts entertaining and on the mark.  If other's don't like them, no one is forcing them to read them.

dude  thanks for the info  (links/books names)  I need to read up some...

thanks again this will keep me busy  for a while..

p.s.  just don't tell  DR. j/y turbo build up that I'm looking at turbo's...lol

we went back and forth  on why a j/y build up would suck...  for  quite a few post .... 

P.S.I still feel that a cheap j/y bigblock build up ain't ever gonna be cheap... but I'd like them to do one  just to see what he(DR)  would then type in big bold type at the end of his post...  as his  "big cube turbo build" at the end of each post is  well ...  pointless..and old!!!

if you think of more links to info..,.  holla

"For example, Butler Performance Group has pulled some amazing numbers on both racing gasoline and alcohol with turbocharging on an aftermarket block/head 440-cube Pontiac:

"In addition to building a 440ci, 2,200hp, gasoline-burning twin-turbo Pontiac V-8 . . .  they have also built up the world's most powerful traditional Pontiac V-8 yet assembled."

Butler's stuff is wicked.  He's helping keep the "real" Pontiac alive.  Too bad GM isn't . . . .

exactly there, trucks need torque, heck, look at a 454 motorhome, my Grand Am is only 60hp short of it or so, but torque, well, it would likely snap my car in two.

Plus GM has to consider emissions, mpg, noise levels, and cost savings.