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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old April 11th, 2017, 06:46 PM
atomman atomman is offline
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Default V-12 with blowers

OK, I have to much time to think, so, I have a V-12 , 0.040, aluminum 3 ring pistons, mild cam just sittin' on the shelf. Has anyone ever put 2 blower on top of this monster, and is it even possible.
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  #2  
Old April 11th, 2017, 11:55 PM
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Default Re: V-12 with blowers

I think the best bet would be to build a manifold that sits on top of the two existing manifolds that connects them together at their top bases and just run one blower say from a 12V-71 engine.
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Old April 12th, 2017, 02:04 AM
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Default Re: V-12 with blowers

The cool factor was sky rocket. You'd have figure a way to drive the second blower.
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Old April 12th, 2017, 03:49 AM
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Default Re: V-12 with blowers

Would this work sufficiently with standard head or would magnums be required?
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Old April 12th, 2017, 02:54 PM
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Default Re: V-12 with blowers

I'VE BEEN KICKING THAT AROUND ALSO. I'M THINKING 4 TURBOS, ONE ON EACH EXHAUST MANIFOLD. 2 FOR EACH CARB, 650 CFM EACH.
ANY THOUGHTS? WAS GOING TO HAVE CAM REGROUND, WILL TURBOS NEED A DIFFERENT CAM PROFILE? DON'T HAVE MUCH EXPERIENCE WITH TURBO CHARGERS.
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Old April 13th, 2017, 04:14 AM
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Default Re: V-12 with blowers

4 Turbo's definitely sound good, are you talking about using two 650cfm 4 barrel carbs? If you're going to be running that much carburetion then a custom grind cam would be a good idea.
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Old April 13th, 2017, 04:16 AM
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Default Re: V-12 with blowers

Quote:
Originally Posted by atomman View Post
OK, I have to much time to think, so, I have a V-12 , 0.040, aluminum 3 ring pistons, mild cam just sittin' on the shelf. Has anyone ever put 2 blower on top of this monster, and is it even possible.
Atomman
To get the most out of it Magnum heads would be a good idea though the stock heads are adequate.
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Old April 13th, 2017, 04:04 PM
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Default Re: V-12 with blowers

Would it be a waste of time to port magnum heads and put bigger valves in?
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Last edited by TJ's GMC; April 14th, 2017 at 05:35 AM. Reason: spelling
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Old April 13th, 2017, 04:13 PM
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Default Re: V-12 with blowers

i was wondering if 2 650 cfm carbs would be too much. with the lower rpm band of this engine. i was planning on turning 4000 to 5000 rpm max, depending on how much i can lighten up the rotating assembly.
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Old April 14th, 2017, 04:06 AM
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Default Re: V-12 with blowers

Quote:
Originally Posted by TJ's GMC View Post
Would it be a waste of time to port magnum heads and out bigger valves in?
Magnum heads already have some pretty big valves so there's no need for bigger valves, I had my heads ported for my 478M.
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