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LT5 for 2018 already?

Old 12-23-2016, 10:00 PM
  #21  
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Originally Posted by Mike Campbell
Think people! Why in hell would you replace one of the best engine designs in the world for an extremely more expensive & complicated engine that doesn't have the torque, horsepower or economic advantages? It's nuts! BTW did Porsche abandon the flat boxer six? No! Why? Because it's their trademark and it's stupid to abandon it because it works & if it ain't broke, then don't fix it!
The push rod motor is at it's limits with controlling smog emissions....GM will have no choice but to go with an OHC motor.....think about it, how many other push rod motors are out there that produce BIG HP

Originally Posted by JerriVette
Dohc won't fit under c7 hood...
Who said that the new OHC or DOHC motor will be going into a C7???
Old 12-23-2016, 10:14 PM
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Originally Posted by springer-
Who messed up my thread title???? Put it back to "DOHC for 2018?" Amateur moderators here.... just sayin.
Thread merge man.
Old 12-23-2016, 10:17 PM
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Originally Posted by LT1 Z51
Thread merge man.
I know. They merged a later thread with my earlier thread keeping the name of the later thread. If they are going to merge the threads, the first post in the timeline (in this case my post) should retain the title of the thread. It's an amateur move and they should fix it.
Old 12-23-2016, 11:21 PM
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LT5 is for the 2018 ZR1 (or Z06X, or whatever they decided to name it this time). 750 HP. Yep!
Old 12-23-2016, 11:34 PM
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Originally Posted by Mike Campbell
Think people! Why in hell would you replace one of the best engine designs in the world for an extremely more expensive & complicated engine that doesn't have the torque, horsepower or economic advantages? It's nuts! BTW did Porsche abandon the flat boxer six? No! Why? Because it's their trademark and it's stupid to abandon it because it works & if it ain't broke, then don't fix it!
Simple, EPA average corporate mpg!

As much or more power, 3 vs 6 Liters, independent intake and exhaust variable valve timing, higher rpm limits, room for dual turbo's, more energy efficient! However the engine will have higher profile and won't fit in an existing low hood Vette. I know- how about a mid engine!

Last edited by JerryU; 12-23-2016 at 11:38 PM.
Old 12-23-2016, 11:43 PM
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Actually Porsche did abandon the flat 6 for the Boxster/Cayman models, to meet CAFE. They may regret that decision, the new EPA is likely to shakeup the CAFE standards.
Old 12-24-2016, 12:32 AM
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I'll go along with whatever the V8 engine team does, as long as they keep it a 90 degree V8 with split plane crank for smoothness and classic American V8 sound. They've already proven themselves for producing an engine with world class power, and fuel economy that rivals some V6's (6.2L V8 has same city mileage in Camaro 6-speed as the 3.6L V6).

Michael
Old 12-24-2016, 06:25 AM
  #28  
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Originally Posted by nyca
Actually Porsche did abandon the flat 6 for the Boxster/Cayman models, to meet CAFE. They may regret that decision, the new EPA is likely to shakeup the CAFE standards.
Porsche also put the engine in the Boxter where it belongs! Predict the old 911 look variants will follow! Even Ferry Porsche knew a mid engine location was the right place for an engine! However financially he had to use the VW, "peoples car" as a base for his first sports car!
Old 12-24-2016, 08:55 AM
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I am willing to bet that is the new DOHC V-8 for the mid-engined Cadillac.
Unless they raise the hood on a C7 by 2-3", that DOHC isn't going to fit.
Old 12-24-2016, 09:08 AM
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Originally Posted by LIStingray
I am willing to bet that is the new DOHC V-8 for the mid-engined Cadillac.
Unless they raise the hood on a C7 by 2-3", that DOHC isn't going to fit.
DOHC but my guess is a 3 to 4 Liter dual turbo V6! More energy efficient and only low mpg at higher rpm and when at WOT, which is not part of the EPA required test cycle! If not in the Caddy will be in the lower cost Chevy version that will follow!

V8s will go by the way of round taillights, IMO. Going to sell my 2014 Z51 early next year and get a GS a year sooner than usual while I can still get a V8 and standard shift.

The value of the 8.2 Liter engine in my ProSteet Rod will increase.

Although not as efficient it would great if they used an old 1.5 Liter Colombo designed V12 Ferrari engine. The sound along would sell the car.

Last edited by JerryU; 12-24-2016 at 09:24 AM.
Old 12-24-2016, 09:31 AM
  #31  
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Wasn't the first LT5 a DOHC as well as the Northstar I had in my STS? Then didn't GM step up the C4's LT1 & later LT4 which performed as well and weighed & cost less? And didn't Cadillac drop the Northstar because of cost & efficiency? Maybe GM will go that way I'm not sold on the idea that it's really a good thing to do.
Old 12-24-2016, 09:32 AM
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Originally Posted by LIStingray
I am willing to bet that is the new DOHC V-8 for the mid-engined Cadillac.
Unless they raise the hood on a C7 by 2-3", that DOHC isn't going to fit.
If you're talking about the LT5, it is certainly going into the front engine car most have designated as a ZR1. The "Y" designation means Corvette.
Old 12-24-2016, 09:40 AM
  #33  
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The original zr1 engine was designated lt5 and was dohc. Don't think it's a coincidence they're coming back out with a zr1 and on the engine sheet they show a dohc designated lt5. Just wondering how they're going to make more power than the z06 with a NA dohc engine. But with all the complaints with overheating on z06s maybe they will stick with a NA engine in the zr1.
Old 12-24-2016, 10:09 AM
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Originally Posted by JimNeedsC7
- Wow!

That LT5 would be a very nice engine upgrade for the Vette.

But the LT1 is a thing of wonder and beauty and IMO it will prove hard for the LT5 to really improve upon it in most road use, no matter how nice it is. I mean, how often do we say, "That Vette would be a really nice car if it just had more motor".
Well, just about everyday. I'm at 520 HP now with bolt ons and thinking about a Procharger
Old 12-24-2016, 11:16 AM
  #35  
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Originally Posted by springer-
I know. They merged a later thread with my earlier thread keeping the name of the later thread. If they are going to merge the threads, the first post in the timeline (in this case my post) should retain the title of the thread. It's an amateur move and they should fix it.
Shudup whiner
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Old 12-24-2016, 11:40 AM
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...and more about it here.

http://www.autoevolution.com/news/20...v8-114077.html


\db2
Old 12-24-2016, 11:57 AM
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It's a great time to be a Corvette Can. I love all the theories, and can't wait to see what actually happens. Perhaps we should have a pool, winnings donated to St Jude
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To LT5 for 2018 already?

Old 12-24-2016, 12:41 PM
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Originally Posted by C7gs812
The original zr1 engine was designated lt5 and was dohc. Don't think it's a coincidence they're coming back out with a zr1 and on the engine sheet they show a dohc designated lt5. Just wondering how they're going to make more power than the z06 with a NA dohc engine. But with all the complaints with overheating on z06s maybe they will stick with a NA engine in the zr1.
Ford is making a lot more power with a lot less displacement than the LT1.

Also, who is to say it's going to be NA?
Old 12-24-2016, 01:15 PM
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The spec sheet where the info came from designated if engines were turbo or supercharged. For the lt5 it mentions neither.
Old 12-24-2016, 01:57 PM
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This is almost certainly for the ZR1. It would slot in perfectly at 720ish HP. No forced induction to solve the cooling issue.

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