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Documents Indicate LT5 = 6.2L NA DOHC V8 --- Bottom of Page 5

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Old 12-22-2016, 10:24 PM
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NemesisC5
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Default Documents Indicate LT5 = 6.2L NA DOHC V8 --- Bottom of Page 5
Don't kill the messenger...read the document and come to your own conclusions.

https://service.gm.com/dealerworld/v...-16%20r1.0.pdf
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12-24-2016, 02:10 AM
Bill Dearborn
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Originally Posted by thebishman
I know exactly what a "coking" problem is, it's just that there has been no-one that has had an issue with it with the LT4.
I agree. Finding anybody that has had an issue with it in any of GM's DI engines is hard. GM has made millions of the V6 DI engines that have been on the road since the 2007 model year with millions of miles put on them and coking isn't a big issue with them. Bad timing chains will get you a pretty good discussion though.

All of the coking hype with the Corvette DI engines comes from people trying to market a product for a problem that doesn't exist.

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Old 12-22-2016, 10:36 PM
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Wow! Super interesting.....I noticed it isn't listed as being in any vehicle (Camaro or Corvette) at least yet...
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Old 12-22-2016, 10:36 PM
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TRANS DAMM
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Originally Posted by NemesisC5
Don't kill the messenger...read the document and come to your own conclusions.

https://service.gm.com/dealerworld/v...-16%20r1.0.pdf
Hmmm. Z28 motor for sure, and it's going in the vette too so maybe it's a track pack car and not a ZR1 after all. What's the hp guess? 600?
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Old 12-22-2016, 10:46 PM
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DOHC

Double over head cam
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Old 12-22-2016, 10:46 PM
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Interesting. I think this is probably the engine for the unrevealed track focused Camaro. Think about it. Why would the new "ZR1" have a huge bulging hood and extremely large side intakes in the front if it was NA? If it was NA, I'm sure it would have much smaller side vents or even none at all.

Just a guess, but we'll find out in a few weeks hopefully.
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Old 12-22-2016, 10:46 PM
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Originally Posted by schlok
Wow! Super interesting.....I noticed it isn't listed as being in any vehicle (Camaro or Corvette) at least yet...
No ZR1 listed either!!!!!!!
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Old 12-22-2016, 10:54 PM
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it is listed as Y body platform which is corvette!

http://gmauthority.com/blog/gm/gm-platforms/y-platform/
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Old 12-22-2016, 10:56 PM
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Default Same Old!?
http://www.mercuryracing.com/sema-2015/
Last edited by johnglenntwo; 12-22-2016 at 10:59 PM.
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Old 12-22-2016, 11:03 PM
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NemesisC5
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Originally Posted by TRANS DAMM
Hmmm. Z28 motor for sure, and it's going in the vette too so maybe it's a track pack car and not a ZR1 after all. What's the hp guess? 600?
Doing the math of a direct comparison with GM LGX 3.6L V6 VVT DOHC shows about 577 HP...although if top shelf components are used (like in LF4) 600 would seems quite attainable.
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Old 12-22-2016, 11:05 PM
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Originally Posted by dvandentop
it is listed as Y body platform which is corvette!

http://gmauthority.com/blog/gm/gm-platforms/y-platform/
Yeah. That could get interesting.
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Old 12-22-2016, 11:15 PM
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Default More power under the curve! :)
More RPM and a usable powerband could net this sucker a LT4 track walk not invoking PTM as much!
Last edited by johnglenntwo; 12-22-2016 at 11:17 PM.
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Old 12-22-2016, 11:18 PM
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Originally Posted by NemesisC5
Doing the math of a direct comparison with GM LGX 3.6L V6 VVT DOHC shows about 577 HP...although if top shelf components are used (like in LF4) 600 would seems quite attainable.
Does SIDI mean Sequential port injection combined with DI?
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Old 12-22-2016, 11:23 PM
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Originally Posted by G fix needy
Does SIDI mean Sequential port injection combined with DI?
If their smart it does. No more carbon loading up on the valves!!! Time to be making some changes!
Last edited by johnglenntwo; 12-22-2016 at 11:25 PM.
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Old 12-22-2016, 11:35 PM
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NemesisC5
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Originally Posted by G fix needy
Does SIDI mean Sequential port injection combined with DI?
Yes...straight from some of the V6 engines
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Old 12-22-2016, 11:45 PM
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If they do that, I'm out. Gotta have that low-end torque that comes from a pushrod design.
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Old 12-22-2016, 11:59 PM
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Originally Posted by C5 Hardtop
If they do that, I'm out. Gotta have that low-end torque that comes from a pushrod design.
I thought that low end torque came via V8 displacement!?
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Old 12-22-2016, 11:59 PM
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http://buffalonews.com/2016/12/13/gm...announcements/
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To Documents Indicate LT5 = 6.2L NA DOHC V8 --- Bottom of Page 5

Old 12-23-2016, 12:12 AM
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NemesisC5
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Originally Posted by C5 Hardtop
If they do that, I'm out. Gotta have that low-end torque that comes from a pushrod design.
A push rod engine has no inherent performance advantage over DOHC especially in a 6.2L V8, in fact quite the opposite is true. You'll not be disappointed.
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Old 12-23-2016, 12:23 AM
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Originally Posted by NemesisC5
A push rod engine has no inherent performance advantage over DOHC especially in a 6.2L V8, in fact quite the opposite is true. You'll not be disappointed.
You have to wait longer for the power in a OHC design. The R's need to build. The pushrod design brings the "low-end grunt". That is the beauty of the LS engines that you won't get with an OHC.
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Old 12-23-2016, 01:11 AM
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SharkbyteLT4
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A 6.2 dohc engine with a huge whipple blower on top would be sick and fast as hell. Sign me up
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