Re: Crazy idea...
Posted by todd jordan rayner On 2011/12/5 3:18:50
on the original topic i would think if one were to diesel a packard (which seems like it would negate the purpose of owning a packard) one would want to do it in such a manner that it was snuck in and if you never popped the hood, no one would know. I have owned and driven near every diesel out there and the only one that would seem like it was even a candidate would be the duramax as it is whisper quiet to start with and i think one could quiet it further by going with larger pipe but extra mufflers in succession. I did this by accident when i put 5" turbo back on the shop truck and had to modify things because the truck is lowered 6 inches. I put an extra 5" muffler on it to get out past the dually fender because i ran out of pipe and the truck shop was closed. i started up waiting to hear the rumble and power of 22 feet of five inch stainless steel pipe and it was quieter than stock. I think if one was to play with this phenomenon and add a dual walled insulated downpipe like the 12 you could get it to the point where you could stand next to it and not know it was running. That is personally how I would do it if someone showed up at my shop asking for a diesel conversion on their packard and I couldn't talk them out of it. Or of course if we lived in a fantasy world where pre war senior packards were as plentiful as volkswagon bugs. I have been guilty of thinking in the back of my head how it might be neat to attempt a convincing period correct turbo twelve that would pas as a factory option. I have a thing for early turbo and supercharger cars and the packard twelves manifold set up almost looks as if though they were planning a blow through turbo set up. Plus the turbo would make it even quieter.
The thought of lowslung senior prewar fenderless landspeed saltflat style racer powered by a 1500hp packard pt-boat supercharged twelve built from all period correct parts has also crossed the drawingboard in the back of my head.
like this one from PT-boats site
"Despite the commonplace assumption, the new-generation Packard marine engine, initially tagged the 4M-2500, was anything but a re-popped Liberty. Instead, Vincent, Packards lead engineer, started with a clean sheet and designed a four-stroke, 60-degree V-12 with an aluminum block with a bore of 6.04 inches and a 6.50-inch stroke, which brought it to 2,490 cubic inches. Weighing 2,900 pounds, the 4M-2500 had four valves per cylinder, a 6.4:1 compression ratio, and a centrifugal supercharger, later models were also fitted with an intercooler. A Holley 1685F aircraft carburetor supplied the fuel, 100-octane gasoline, fired by two spark plugs per cylinder. The first engines developed 1,200hp, but improved versions with higher boost levels nominally made 1,500hp. Packard built 14,000 marine engines during the war, three of which went into each of the Navy's 768 PT boats, two astern and one amidships for better service access. "
I would imagine it would be well into the passanger compartment to get it behind the rad. But all packard.
Attach file:
(13.89 KB)
(6.41 KB)
The thought of lowslung senior prewar fenderless landspeed saltflat style racer powered by a 1500hp packard pt-boat supercharged twelve built from all period correct parts has also crossed the drawingboard in the back of my head.
like this one from PT-boats site
"Despite the commonplace assumption, the new-generation Packard marine engine, initially tagged the 4M-2500, was anything but a re-popped Liberty. Instead, Vincent, Packards lead engineer, started with a clean sheet and designed a four-stroke, 60-degree V-12 with an aluminum block with a bore of 6.04 inches and a 6.50-inch stroke, which brought it to 2,490 cubic inches. Weighing 2,900 pounds, the 4M-2500 had four valves per cylinder, a 6.4:1 compression ratio, and a centrifugal supercharger, later models were also fitted with an intercooler. A Holley 1685F aircraft carburetor supplied the fuel, 100-octane gasoline, fired by two spark plugs per cylinder. The first engines developed 1,200hp, but improved versions with higher boost levels nominally made 1,500hp. Packard built 14,000 marine engines during the war, three of which went into each of the Navy's 768 PT boats, two astern and one amidships for better service access. "
I would imagine it would be well into the passanger compartment to get it behind the rad. But all packard.
Attach file:
(13.89 KB) (6.41 KB)This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=90739