Forums Migration

Please read this thread

Recent Topics
Hy-per Lube ZDDP Supplement 6pk $13.00
by alchargo - 07/11/20 10:38 PM
97 Civic HX valve cover pics
by CARJ - 07/11/20 10:22 PM
Time to ditch Speedplays
by UG_Passat - 07/11/20 10:03 PM
Dale L Nuzum
by Dalenuzum - 07/11/20 10:02 PM
*BANG* (Garage Door Spring)
by ctechbob - 07/11/20 09:40 PM
TPMS Sensors
by 92saturnsl2 - 07/11/20 09:16 PM
Chevron Delo 400 XSP 5W-30 XSP
by Gene K - 07/11/20 08:48 PM
LED retrofit for recessed can lights
by Donald - 07/11/20 07:08 PM
PP HM 5W-20 $15 at Wally
by Jackson_Slugger - 07/11/20 07:03 PM
Defeated by roll pin
by bcossa2001 - 07/11/20 06:56 PM
Dexron VI in place of Mercon LV?
by BigLee - 07/11/20 06:50 PM
89 c4 oil
by dogememe - 07/11/20 06:17 PM
Noticed the Titanium info.
by Farnsworth - 07/11/20 06:16 PM
FebiBilstein Parts
by willbur - 07/11/20 06:03 PM
Life goes on
by 53' Stude - 07/11/20 06:02 PM
Lubegard in a GM transfer case?
by BlakeB - 07/11/20 05:21 PM
Is MSO2 Liquid Moly OK in DIG NA engines
by JimPghPA - 07/11/20 03:10 PM
Rider Magazine Question
by Smoky14 - 07/11/20 02:38 PM
Beater trifecta
by Red91 - 07/11/20 01:08 PM
Newest Members
ILoveOil111, quantalume, SUmeme22, DaveCaddell, SharkNC
71909 Registered Users
Who's Online Now
30 registered members (carlprop, ctechbob, blufeb95, 77GrandPrix, BlakeB, bobfather99, 1 invisible), 837 guests, and 41 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics307,745
Posts5,316,911
Members71,909
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 4 1 2 3 4
GM LT-8 6.6 liter Truck Engine. New for 2020. #5339820 02/03/20 09:28 AM
Joined: Dec 2017
Posts: 6,699
S
Snagglefoot Offline OP
OP Offline
S
Joined: Dec 2017
Posts: 6,699
Here is the site from GMAuthority discussing the new 6.6 liter engine for the Chev and GMC 3/4 and up trucks. It is the replacement for the venerable 6.0 and true to form does not have AFM or girly man start stop. It still has VVT. It also uses the proven 6L90 transmission. No fancy 10 speed for this thing. Enjoy.

https://gmauthority.com/blog/2019/02/6-6l-v8-l8t-gm-engine-specs-released/


If you want the job done right......do it yourself.
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5339832 02/03/20 09:44 AM
Joined: Oct 2019
Posts: 189
B
buddylpal Offline
Offline
B
Joined: Oct 2019
Posts: 189
How is start-stop girly man?

Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5339844 02/03/20 10:03 AM
Joined: Oct 2010
Posts: 7,866
A
A_Harman Offline
Offline
A
Joined: Oct 2010
Posts: 7,866
I've been following the Battle of the Big Gassers on TFL Truck. They have some great videos of the 6.6 GM and 7.3 Ford towing max loads up the Eisenhower grade in Colorado.

The Ford test, unedited.
https://www.youtube.com/watch?v=S5juznc4prc

The GM test.
https://www.youtube.com/watch?v=2FBAbE8dE3k&list=PLjXptazwnueqnqm_Y8NwotkAf1bXVTRvN&index=5


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5339845 02/03/20 10:03 AM
Joined: Dec 2019
Posts: 6
R
Renzo Offline
Offline
R
Joined: Dec 2019
Posts: 6
And how is the 6L90 proven? Proven to fail around 120k miles from what I have seen.

Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Renzo] #5339867 02/03/20 10:37 AM
Joined: Dec 2017
Posts: 6,699
S
Snagglefoot Offline OP
OP Offline
S
Joined: Dec 2017
Posts: 6,699
Originally Posted by Renzo
And how is the 6L90 proven? Proven to fail around 120k miles from what I have seen.


200,000 miles on mine. YRMV. smile


If you want the job done right......do it yourself.
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5339916 02/03/20 11:41 AM
Joined: Mar 2006
Posts: 2,580
S
sw99 Offline
Offline
S
Joined: Mar 2006
Posts: 2,580
I'll take that Ford 7.3L any day of the week.




Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: sw99] #5339925 02/03/20 11:53 AM
Joined: Aug 2011
Posts: 2,098
K
kstanf150 Offline
Offline
K
Joined: Aug 2011
Posts: 2,098
Originally Posted by sw99
I'll take that Ford 7.3L any day of the week.


✅✅✅

Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: A_Harman] #5339928 02/03/20 11:54 AM
Joined: Aug 2011
Posts: 2,098
K
kstanf150 Offline
Offline
K
Joined: Aug 2011
Posts: 2,098
Originally Posted by A_Harman
I've been following the Battle of the Big Gassers on TFL Truck. They have some great videos of the 6.6 GM and 7.3 Ford towing max loads up the Eisenhower grade in Colorado.

The Ford test, unedited.
https://www.youtube.com/watch?v=S5juznc4prc

The GM test.
https://www.youtube.com/watch?v=2FBAbE8dE3k&list=PLjXptazwnueqnqm_Y8NwotkAf1bXVTRvN&index=5




The hill portion of the test, the 7.3 Ford with a 10 speed tranny was way better the the Chevy

Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5339961 02/03/20 12:33 PM
Joined: Jan 2003
Posts: 1,268
C
c502cid Offline
Offline
C
Joined: Jan 2003
Posts: 1,268
I run Eisenhower 5-6 times a month, sometimes pulling, sometimes not. Still, unless they closed the road just for them, traffic has a big difference on how fast you can get up and over. I didn't watch the videos though so don't know if they factored it in.


15 Chev Trax AWD
02 GMC 3500 8.1/Ally DRW 4x4
00 Blazer 4.3 4x4
97/98 Civics
84 Chev K30 454EFI/T400/NP205 DRW 4x4
77 E250 Quadravan 460/C6/NP205 4x4
71 GMC Jimmy 502 RamJet/T400/NP205 4x4
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5340009 02/03/20 01:59 PM
Joined: Dec 2017
Posts: 6,699
S
Snagglefoot Offline OP
OP Offline
S
Joined: Dec 2017
Posts: 6,699
This is a classic case of the old bulls vs the young bulls. I believe the test involved flooring it and let the engine decide the gearing.

In real life the young bulls would floor it up a 7% grade just to show Billy Bob who’s boss. The old bulls would manually select the gear and operate near the peak torque of about 4,000 rpm. Also, instead of buying a 7.3 liter gas engine with 450 lb ft, I would buy the 6.7 turbo diesel with over a 1,000 lb ft. LOL


If you want the job done right......do it yourself.
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5340016 02/03/20 02:05 PM
Joined: Jun 2002
Posts: 18,953
A
Al Offline
Offline
A
Joined: Jun 2002
Posts: 18,953
Is that a whole new engine?


Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Snagglefoot] #5340031 02/03/20 02:42 PM
Joined: Aug 2013
Posts: 864
T
tcp71 Offline
Offline
T
Joined: Aug 2013
Posts: 864
Ford’s new Godzilla engine. TFL truck keeps them at 60mph (if they can) towing 16000lb trailer up Ike’s Gauntlet, regardless of gear. There was almost 3 minutes difference between the gm and ford (11.xx minutes vs 8.xx minutes). Traffic has little impact on their tests. They floor it if it drops below 60mph and back off the throttle if it goes above. The gm spent a lot of time struggling below 60, Neither engine is start/stopping while towing.


Last edited by tcp71; 02/03/20 02:46 PM.

2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: PP 5w30 syn. (varies)
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: buddylpal] #5340032 02/03/20 02:42 PM
Joined: Mar 2011
Posts: 1,573
S
SLO_Town Offline
Offline
S
Joined: Mar 2011
Posts: 1,573
Originally Posted by buddylpal
How is start-stop girly man?

Not sure why start-stop would be considered girly man, but I would eliminate from consideration any vehicle that had a start-stop system I couldn't easily disable - and disable by a simple push button, not some multi-step process through a nav screen.

Scott


03 BMW E46 330Ci ZSP (Euro Castrol 0W-30)
10 Honda Element SC (Castrol Magnatec 5W-30)
11 BMW E90 328i M-Sport (Pennzoil Euro 5W-40)
16 VW Passat VR6 3.6L SEL Premium (Castrol 0W-40)
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: Al] #5340073 02/03/20 04:08 PM
Joined: Oct 2010
Posts: 7,866
A
A_Harman Offline
Offline
A
Joined: Oct 2010
Posts: 7,866
Originally Posted by Al
Is that a whole new engine?


Pretty much. It is a 6.2 stroked by 6mm, with iron block, and direct injection. No cylinder deactivation. GM put a little bit of trickery in the block design by drilling through the inter-bore regions to force additional coolant through there, improving bore shape. Still has aluminum heads. It is a replacement for the 6.0L V8 that was used in hd pickups for years. The Gen V 5.3 and 6.2 DI engines that were introduced in 2014 never made it into hd trucks, owing to their aluminum blocks.

Last edited by A_Harman; 02/03/20 04:09 PM.

2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: GM LT-8 6.6 liter Truck Engine. New for 2020. [Re: c502cid] #5340078 02/03/20 04:13 PM
Joined: Oct 2010
Posts: 7,866
A
A_Harman Offline
Offline
A
Joined: Oct 2010
Posts: 7,866
Originally Posted by c502cid
I run Eisenhower 5-6 times a month, sometimes pulling, sometimes not. Still, unless they closed the road just for them, traffic has a big difference on how fast you can get up and over. I didn't watch the videos though so don't know if they factored it in.


The GM truck was so slow, it was causing traffic problems. Even big rigs were pulling out to pass it.
The Ford romped up the hill so well, it was a thing of beauty. If you like hearing a V8 sing at 4000+ rpm for 8 minutes, I highly recommend the video that I linked. They actually had to back off early to slow down at the end of the run, otherwise it would have made a better time.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Page 1 of 4 1 2 3 4
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™