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Old 03-01-2010, 03:31 PM   #1
chrismoore701
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Gmc 702 c.i. V12

Thats right a GMC V12. Check out this link, they are bringing them back, not sure if they will fit in our trucks, but I bet some of you guys can make it fit.

http://www.thunderv12.com/
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Old 03-01-2010, 04:17 PM   #2
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Re: Gmc 702 c.i. V12

2400 rpm peak power with the stock cam, closer to 3000 rpm peak power with their "HP" cam. Cool novelty item though.
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Old 03-01-2010, 05:25 PM   #3
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Re: Gmc 702 c.i. V12

http://thunderv12.com/power

i dont know davey.....
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Old 03-01-2010, 05:31 PM   #4
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Re: Gmc 702 c.i. V12

Pretty cool looking. I'll stick to my 6.0 though. LS POWAAA
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Old 03-01-2010, 07:21 PM   #5
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Re: Gmc 702 c.i. V12

http://67-72chevytrucks.com/vboard/s...d.php?t=254111

There's one in a truck.
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Old 03-01-2010, 08:42 PM   #6
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Re: Gmc 702 c.i. V12

This is actually on my "to do" list.

The way i would do it would be to move the cab back and shorten the bed; It actually looks pretty good in my mind and if i get around to it i'll make up a sketch and post it.
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Old 03-01-2010, 09:04 PM   #7
gchemist
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Re: Gmc 702 c.i. V12

Fact: GM is now selling the latest in engineering technology, the LS9 supercharged V8 crate engine. It is a marvel. Yet with all the advancements and the addition of a supercharger, the advertised torque of 604lb-ft has not caught the 630 lb-ft that GMC advertised in 1960 for the stock 702 V12! And in our opinion, the looks of the V12 is still un-matchable. We have seen the LS9 for sale at $4,000 more than a ThunderV12. Wow! We are sure the LS9 is also a good looking engine, but until someone removes all the beauty covers and other "stuff" so we can see the actual motor, we won't know for sure.
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Old 03-01-2010, 10:09 PM   #8
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Re: Gmc 702 c.i. V12

It looks like two v-6's bolted together in the middle
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Old 03-01-2010, 10:31 PM   #9
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Re: Gmc 702 c.i. V12

they look pretty beasty, but from some of the pictures posted, it looks like two 350 together, explains the around 700 ci
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Old 03-01-2010, 11:03 PM   #10
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Re: Gmc 702 c.i. V12

Man one of those would be way cool in a mohagany boat.
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Old 03-01-2010, 11:06 PM   #11
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Re: Gmc 702 c.i. V12

Like the one in this video
Now if you had a matching 60's chevy 3/4 ton to pull said boat, that would be even cooler.
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Old 03-02-2010, 12:40 AM   #12
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Re: Gmc 702 c.i. V12

Quote:
Originally Posted by Justin36 View Post
It looks like two v-6's bolted together in the middle
It is two GMC V6s put together. One block, crank, cam, etc. but V6 heads, rods, etc.

Those V12s were probably the best-SOUNDING truck engine ever built.

I almost deluded myself into picking up an old Packard frame off eBay to build into a rod with one of these things in it, but common sense intervened.

I did some sketches and dimensions for an underslung frame for a Brooklands-style track roadster (google Napier-Railton) that'd be just about right for a 702, but that's going to wait until I find a first-rate aluminum panel beater who works for beer money (fat chance, that.)

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Old 03-02-2010, 09:37 AM   #13
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Re: Gmc 702 c.i. V12

Quote:
Originally Posted by MrBeast View Post
Like the one in this video http://www.youtube.com/watch?v=uwIGZLjugKA

Now if you had a matching 60's chevy 3/4 ton to pull said boat, that would be even cooler.
I NOTICED A 73-80 @ 3.21min
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Old 03-02-2010, 11:47 AM   #14
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Re: Gmc 702 c.i. V12

A sure sign they aren't doing so well financially:

Reserve an engine for 2010 production for 25% down.

Reserve an engine for 2011 production for 10% down.
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Old 03-02-2010, 12:05 PM   #15
ghettoluxury
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Re: Gmc 702 c.i. V12

here is one in a bad a$$ hot rod COE



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Old 03-02-2010, 01:58 PM   #16
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Re: Gmc 702 c.i. V12

There use to be a few of those in the Wellington area that were used to power irrigating water pumps, and they ran 24/7. There were also some pumps that ran Hemis.... both 348's and 426's.

I would LOVE to build a hot rod around one of those engines!
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Old 03-02-2010, 03:34 PM   #17
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Re: Gmc 702 c.i. V12

might look kinda like this


Last edited by sandblaster; 03-02-2010 at 03:45 PM.
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Old 03-03-2010, 02:07 AM   #18
kevinr1970
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Re: Gmc 702 c.i. V12

I believe he is a member here and has a build thread for that.
I think his screen name is coyoterun?

*EDIT - yes it is here as posted by pyrotechnic above
Quote:
Originally Posted by sandblaster View Post
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