V12 LS latest

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Circlotron
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V12 LS latest

Post by Circlotron » Wed Sep 27, 2017 3:21 am


GARY C
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Re: V12 LS latest

Post by GARY C » Wed Sep 27, 2017 4:06 am

I wonder how it compares to a 511 tall deck V8 in power and efficiency? It's hard not to like a V12.

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Re: V12 LS latest

Post by 1989TransAm » Wed Sep 27, 2017 1:41 pm

That is cool. =D>

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Re: V12 LS latest

Post by Speedbump » Wed Sep 27, 2017 5:26 pm

I saw that car at SEMA last year. The entire build/engine was first class.
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Re: V12 LS latest

Post by SHARKBITEATTACK » Sat Nov 11, 2017 4:13 am

I saw TWO of these behemoths at SEMA this year and captured both of them on film. Even got to see/hear the Camaro leave, and I'll tell you, it sounds just as good as it looks! :D

Mind my video and editing skills, I'm no professional...

https://www.youtube.com/watch?v=1vIo8gx15ds

https://www.youtube.com/watch?v=lPDCu-1vD4I

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Re: V12 LS latest

Post by mag2555 » Sat Nov 11, 2017 7:37 am

Since a was a kid I always loved V12 motors!

To this day when I see one I bet my face probably looks like this!
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Re: V12 LS latest

Post by panic » Sat Nov 11, 2017 10:23 am

What does the 8.80" (bore pitch X 2) extra length and offsetting the pins 30 degrees do to the crank stiffness? Certainly moves all of the harmonic orders around.

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Re: V12 LS latest

Post by SHARKBITEATTACK » Sat Nov 11, 2017 5:57 pm

panic wrote:
Sat Nov 11, 2017 10:23 am
What does the 8.80" (bore pitch X 2) extra length and offsetting the pins 30 degrees do to the crank stiffness? Certainly moves all of the harmonic orders around.
I'm sure it's more prone to twisting. It doesn't use split pins though. It is an odd firing engine
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Re: V12 LS latest

Post by roc » Sat Nov 11, 2017 6:41 pm

SHARKBITEATTACK wrote:
Sat Nov 11, 2017 5:57 pm
panic wrote:
Sat Nov 11, 2017 10:23 am
What does the 8.80" (bore pitch X 2) extra length and offsetting the pins 30 degrees do to the crank stiffness? Certainly moves all of the harmonic orders around.
I'm sure it's more prone to twisting. It doesn't use split pins though. It is an odd firing engine
Image
Nice picture, thank you. Is it like two V6 (4.3) cranks lined up? Does anyone know firing order?

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Re: V12 LS latest

Post by Kenova » Sat Nov 11, 2017 8:27 pm

Here's a page with the firing order.
http://v12ls.com/technical-information/

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Re: V12 LS latest

Post by roc » Sat Nov 11, 2017 9:24 pm

Kenova wrote:
Sat Nov 11, 2017 8:27 pm
Here's a page with the firing order.
http://v12ls.com/technical-information/

Ken
Thanks a lot Ken, very good information there. So it's odd fire (30° & 90°intervals), alternating cylinder banks in each fire.

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Re: V12 LS latest

Post by 1989TransAm » Sat Nov 11, 2017 9:47 pm

mag2555 wrote:
Sat Nov 11, 2017 7:37 am
Since a was a kid I always loved V12 motors!
I am with you. I have always had a fascination with the V12. However my pocket book does not match the price. :mrgreen:

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Re: V12 LS latest

Post by Circlotron » Sat Nov 11, 2017 10:31 pm

Crank looks just like a 6 cyl in-line but with very wide mains.
As far as firing order is concerned, if you treat each bank separately then each bank is like 1-5-3-6-2-4 in-line 6 cyl firing. Left bank is 3 RHS power strokes behind the right bank but same firing order if you think of that bank only.

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Re: V12 LS latest

Post by panic » Sat Nov 11, 2017 11:54 pm

AFAIK all V6 currently in production are 60° bank angle with 60° offset pins (Toyota shown below), or (if based on V8) 90° bank with 30° pins. None are odd fire.

Image

In my opinion the V6 is safer with very low journal overlap due to the relatively short overall length = stiffness. Overall length of a "V" design between 1st and last MB is typically (number of cylinders per bank) X bore pitch + 1 rod journal width.

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Re: V12 LS latest

Post by SHARKBITEATTACK » Sun Nov 12, 2017 2:13 am

@panic don't you mean 15 degree offset pins?

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