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Old July 10th, 2016, 11:26 AM
turbobill turbobill is offline
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Join Date: Feb 2013
Location: northern NY when not flying
Truck: 1968 HM80 with a 478M and a few engines plus a Toro-Flow
Posts: 98
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Default Re: Plans for a 478 build.

Quote:
Originally Posted by TJ's GMC View Post
Don't have the money yet. haha! Don't even have a motor yet. Just planning for the near future.
A 478 is more diesel like in it's construction (heavy parts/limited breathing). As such, I'd approach a build with only one idea..................boost! That will allow you to keep the engine speed within stock limits and take the high cost of making it live at higher RPMS out of the equation.

Perfect your fabrication skills and learn all you can about turbocharging. Over the years, I've built a few turbocharged engines and fabricated the setups. You'd be surprised on how much power you can make on the "cheap", relatively speaking of course.

I can easily see a 478 making 800 lbs ft of torque at 1400 to 1800 RPM's and about 400 to 425 HP at 3200 to 3400 RPMS with no more than 15 pounds of boost on a simple draw through carbureted fuel system with breaker points in the distributor and simple water/alcohol injection............with a single turbo.

With an good engine, this could be done for less than a couple grand.
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