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Open Roads Forum  >  Tow Vehicles

 > GM's New LT6 Engine

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FishOnOne

The Great State of Texas

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Posted: 10/30/21 08:36pm Link  |  Quote  |  Print  |  Notify Moderator

For you gear heads this new engine is a work of art.

670HP naturally aspirated
5.5 Liter
Forged titanium rods
Titanium intake valves
12.5:1 compression
High flow intake system
Cross plane crank

Enjoy... Link


'12 Ford Super Duty FX4 ELD CC 6.7 PSD 400HP 800ft/lbs
"200k Mile Club"
'16 Sprinter 319MKS "Wide Body"


ssthrd

Vancouver Island

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Posted: 10/31/21 12:04am Link  |  Quote  |  Print  |  Notify Moderator

Most awesome Vette ever! Puts my '79 L82 to shame. Lol. I can hardly wait to see a Nurburgring test.

Heard some time ago that there could be a hybrid somewhere down the road with 1,000+ HP. Maybe the last and greatest of all......


2014 Keystone Laredo 292RL
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Geo*Boy

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Posted: 10/31/21 08:09am Link  |  Quote  |  Print  |  Notify Moderator

Awesome motor.

Grit dog

Black Diamond, WA

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Posted: 10/31/21 11:09am Link  |  Quote  |  Print  |  Notify Moderator

Only watched part of it, but wow! Presuming it’s a pump gas motor as well since it’s destined to be a production engine? Simply amazing power to displacement ratio!


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
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ktmrfs

Portland, Oregon

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Posted: 10/31/21 11:17am Link  |  Quote  |  Print  |  Notify Moderator

the sound of a flat plane crank V-8 is something you will remember.


2011 Keystone Outback 295RE
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2015.5 Denali 4x4 CC/SB Duramax/Allison
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parker.rowe

Delaware

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Posted: 10/31/21 01:36pm Link  |  Quote  |  Print  |  Notify Moderator

If you are in the market for that kind of car, its a heck of deal too.

I always thought the z06 was a lot of car for the money. But the new c8 is impressive. I don't like the center console, but the rest is awesome.


2015 Starcraft TravelStar 239TBS 6500 GVWR
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ssthrd

Vancouver Island

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Posted: 10/31/21 03:04pm Link  |  Quote  |  Print  |  Notify Moderator

I used to add 104+ octane booster running 11.5:1 on 104 premium. Cold days were fine, but when the air temps went up the booster came out.

With todays engine management systems, maybe premium fuel will do the job for a 12.5:1 engine.

I would have to get used to the sound of a flat crank. Always loved the sound of a small block at 7K.

* This post was edited 10/31/21 03:10pm by ssthrd *

ktmrfs

Portland, Oregon

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Posted: 10/31/21 10:28pm Link  |  Quote  |  Print  |  Notify Moderator

ssthrd wrote:

I used to add 104+ octane booster running 11.5:1 on 104 premium. Cold days were fine, but when the air temps went up the booster came out.

With todays engine management systems, maybe premium fuel will do the job for a 12.5:1 engine.

I would have to get used to the sound of a flat crank. Always loved the sound of a small block at 7K.


head design and FI and electronics have made high compression on 91 octane gas possible. My FI off road motorcycle runs 12.5:1 no problems on 91 octane and 13,000 + rpm.

StirCrazy

Kamloops, BC, Canada

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Posted: 11/01/21 09:23am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

Only watched part of it, but wow! Presuming it’s a pump gas motor as well since it’s destined to be a production engine? Simply amazing power to displacement ratio!


that wont be a production engine, its a vett only motor. to expensive of a motor for general production no one would pay the extra for it.

Steve


2014 F350 6.7 Platinum
2016 Cougar 330RBK

ktmrfs

Portland, Oregon

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Posted: 11/01/21 10:07am Link  |  Quote  |  Print  |  Notify Moderator

StirCrazy wrote:

Grit dog wrote:

Only watched part of it, but wow! Presuming it’s a pump gas motor as well since it’s destined to be a production engine? Simply amazing power to displacement ratio!


that wont be a production engine, its a vett only motor. to expensive of a motor for general production no one would pay the extra for it.

Steve


not sure about "no one would pay extra for it". Look back in history and see how much people paid for engine options like the chrysler hemi, ford 429, and many other performance motors.

and since it will roll off the production line in a street legal vehicle I'd call that a production engine. Probably require 91 octane.

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