Rollincool
Always Rollin
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Joined: 08/10/2007
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skipnchar wrote:I'd guess they were trying to promote the diesel. 6.0 doesn't even come CLOSE to the torque of the 8.1
373 to 450 isn't CLOSE? We're only talking 75 ft lbs.  I don't think thats bad at all for a 496CI BB compared to a 364CI SB stroker motor!
Naturally a BB is going to have more torque. The 6.0 pushes 353 hp @ 5400 rpm 373 lb.-ft. of torque @ 4400 rpm.
Big blocks are heavier and run hotter. The auto industry wants lighter, and more econominal motors with just about EVERYTHING computer controlled. 
2008 Chevy Silverado 4x4 3500 RC/LB 6.0 
2007 Chevy GS Yellowstone 5290 6.0
2007 Chevy HHR Toad 2LT 2.4
1990 Chevy G20 Cargo Van 305 
1967 Chevy Camaro Pro Street 468/650hp BBC 
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LarryJM
NoVa
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Joined: 11/09/2007
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8.1 Van wrote:LarryJM wrote:Rock2 wrote:anyone know why chevy is not making 8.1 gas engine? I just realized when I read "2008 Guide to Towing" and did not see any of V8 8.1 engine. I figure it would be cheaper to have 8.1 engine over diesel engine in a long run and the price of diesel is too expensive.
If you're taking new that might be true, but in the long run something like the 7.3PSD will beat the 8.1 hands down for TT much over 6K ... 10 to 12 for the 7.3 and 7-8 for the 8.1. You mention the fuel cost but consider for 1000 mile at 7mpg for gas at say $4/gal that's 142 gal for a cost of $571. The same 1000 miles at 10 mpg for the diesel is 100 gal for a cost of $600. Also, the diesel will last at least twice as long as any gasser on average ... only problem is that now the used diesels that used to cost $4K more than the same gasser are getting $8K more used than an equivalent gas based vehicle which again sort of shots a hole in the upfront cost argument.
The new 2008 and up vehicles diesel especially might not worth the cost over something like the still offered Ford based V-10 properly geared.
Larry
The 7.3 PSD is derated in the E350 vans and is rated at 215HP 425TQ compared to 340HP 460TQ in the 2002 8.1 3500 vans.
True, but a slight/mild chip or programmer will take that advantage away and the torque on the diesel is so much flatter and at a slower rpm than the screaming gasser it's a no brainer. I've towed both with the older big block 460 V-8 gasser for over 100K miles and now with the PSD and there is no comparison. Your 35TQ advantage that you get when redlined my diesel is just at it's best mpg rpm. You have obviously never owned a diesel or towed with one or wouldn't be posting such nonsense. Also remember that extra $150 or so for every 1000 miles you are spending in gas over what I'm now saving even paying $1 more per gallon of fuel. Remember HP might get you there faster, but torque is what pulls and maintains you there pulling.
Larry
2001 standard box 7.3L E-350 PSD Van with 4.10 rear and 2007 Holiday Rambler Aluma-Lite 8306S Been RV'ing since 1974. TRAILER MODS
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Engineer9860
Eagle Scout dad
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Joined: 08/10/2003
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LarryJM wrote:8.1 Van wrote:LarryJM wrote:Rock2 wrote:anyone know why chevy is not making 8.1 gas engine? I just realized when I read "2008 Guide to Towing" and did not see any of V8 8.1 engine. I figure it would be cheaper to have 8.1 engine over diesel engine in a long run and the price of diesel is too expensive.
If you're taking new that might be true, but in the long run something like the 7.3PSD will beat the 8.1 hands down for TT much over 6K ... 10 to 12 for the 7.3 and 7-8 for the 8.1. You mention the fuel cost but consider for 1000 mile at 7mpg for gas at say $4/gal that's 142 gal for a cost of $571. The same 1000 miles at 10 mpg for the diesel is 100 gal for a cost of $600. Also, the diesel will last at least twice as long as any gasser on average ... only problem is that now the used diesels that used to cost $4K more than the same gasser are getting $8K more used than an equivalent gas based vehicle which again sort of shots a hole in the upfront cost argument.
The new 2008 and up vehicles diesel especially might not worth the cost over something like the still offered Ford based V-10 properly geared.
Larry
The 7.3 PSD is derated in the E350 vans and is rated at 215HP 425TQ compared to 340HP 460TQ in the 2002 8.1 3500 vans.
True, but a slight/mild chip or programmer will take that advantage away and the torque on the diesel is so much flatter and at a slower rpm than the screaming gasser it's a no brainer. I've towed both with the older big block 460 V-8 gasser for over 100K miles and now with the PSD and there is no comparison. Your 35TQ advantage that you get when redlined my diesel is just at it's best mpg rpm. You have obviously never owned a diesel or towed with one or wouldn't be posting such nonsense. Also remember that extra $150 or so for every 1000 miles you are spending in gas over what I'm now saving even paying $1 more per gallon of fuel. Remember HP might get you there faster, but torque is what pulls and maintains you there pulling.
Larry
LMAO!
Read Joe's sig......."FKA PSDExcursion".
Right Joe? 
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L80E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454
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gm seller
holland ny
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Joined: 02/21/2008
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I love my 8.1L it pulls great and is not a high RPM engine highest torque is at 3200. I would have loved to have a duramax but I could not justify the added cost. Sure the diesels last longer but the rest of the truck don't. Right now the resale value on any diesel is terrible no used car lots want them because they can't sell them. Things will change soon when fuel prices come back down.
2006 GMC Sierra SLT 2500HD crew cab 8.1 with 6 speed allison
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8.1 Van
Millstone NJ
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Joined: 03/20/2008
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Engineer9860 wrote:LarryJM wrote:8.1 Van wrote:LarryJM wrote:Rock2 wrote:anyone know why chevy is not making 8.1 gas engine? I just realized when I read "2008 Guide to Towing" and did not see any of V8 8.1 engine. I figure it would be cheaper to have 8.1 engine over diesel engine in a long run and the price of diesel is too expensive.
If you're taking new that might be true, but in the long run something like the 7.3PSD will beat the 8.1 hands down for TT much over 6K ... 10 to 12 for the 7.3 and 7-8 for the 8.1. You mention the fuel cost but consider for 1000 mile at 7mpg for gas at say $4/gal that's 142 gal for a cost of $571. The same 1000 miles at 10 mpg for the diesel is 100 gal for a cost of $600. Also, the diesel will last at least twice as long as any gasser on average ... only problem is that now the used diesels that used to cost $4K more than the same gasser are getting $8K more used than an equivalent gas based vehicle which again sort of shots a hole in the upfront cost argument.
The new 2008 and up vehicles diesel especially might not worth the cost over something like the still offered Ford based V-10 properly geared.
Larry
The 7.3 PSD is derated in the E350 vans and is rated at 215HP 425TQ compared to 340HP 460TQ in the 2002 8.1 3500 vans.
True, but a slight/mild chip or programmer will take that advantage away and the torque on the diesel is so much flatter and at a slower rpm than the screaming gasser it's a no brainer. I've towed both with the older big block 460 V-8 gasser for over 100K miles and now with the PSD and there is no comparison. Your 35TQ advantage that you get when redlined my diesel is just at it's best mpg rpm. You have obviously never owned a diesel or towed with one or wouldn't be posting such nonsense. Also remember that extra $150 or so for every 1000 miles you are spending in gas over what I'm now saving even paying $1 more per gallon of fuel. Remember HP might get you there faster, but torque is what pulls and maintains you there pulling.
Larry
LMAO!
Read Joe's sig......."FKA PSDExcursion".
Right Joe?
I guess he forgot about my 7.3 and 6.0 PSD Excursions. He talks like I did back in the day when diesel fuel was cheaper than gas and the diesel option was 1/2 of what it is on the 2008 models.
FKA PSDExcursion
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
41 Ft 2003 Thor Citation 41-ZBSR TT w/ Hensley Arrow
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Vulcaneer
Northern New England
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In diesel speak the price of diesel is coming down. Last month it was $1.05/gal more than 87 oct gas. Today it is only $.85 more than 87 oct gas. That is cheaper, right?
2006 F350 V10 4X4 SC SB SRW 4.30 22,500 GCWR
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kaydeejay
SE Michigan, USA
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Same reason there won't be many V8s left by 2015. Fuel consumption!
News article the other day said that Caddy has canceled the replacement for the 4.6L Northstar because of fuel consumption regs.
Not quite sure how we tow 12,000# trailers with a 1L 3-cylinder, but that's where we're headed!
Keith J, Retired from GM Engineering
2005 GMC Sierra 2500HD SLE 2WD/CC/SB/DA.
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reno82
Cardiff by the Sea, CA
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Yep, they can't use these engines and make the mpg requirements the government is demanding. The 6.0 won't be far behind unless they can squeeze more miles out of it. Probably go to a 4/8 cylinder 6.0 that runs on 4 when not having a load.
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02super250
around
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I have been looking at diesels and have a V-10 the dealers dont want nothing to do with the big gassers, V-10's are worth nothing in my area now,If i would have known that 2 years ago would have bought a diesel then.And if someone tells you there getting great mileage with there v-10 or 8.1 there giving you a line of B.S.
2006 f250 v-10 4x4 cc shortbed 4:10 brake controller
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Moosetrek
Yuba City, CA
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Having gone from a 7.3 PSD to an 8.1, I can say the 8.1 pulls the same load harder and with less effort. I miss that turbo whine sometimes, but then I step on the skinny pedal for solace and remember that there's something to be said for 496 cubic inches! Also, I traded an 8600# gvw for a 9200 # gvw, with a lighter engine and truck; which helped keep me under my weight ratings...
Silver 2008 Dodge CTD 2500 4X4 QC
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Headed for Wyoming in 7 days!
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