Re: Packard Six with dual carbs?

Posted by Anthony Pallett On 2013/4/24 15:02:00

The Hudson 6 is a good engine to judge what a flat head is capable of. Most of them were twin h equipped and they often had aluminum heads as well. The NASCAR spec racing engine was a different animal all together though. With the factory aluminum head and twin h intake they were ported and relieved from the factory and had a pretty aggressive cam I have the specs somewhere but if my memory is accurate it was around .410 lift. the valve sizes were around 2 inch on the intake and 1.5 inches on the exhaust (or very close to that)and the engines were very large at 308 ci. Hudson had some built in performance that a lot of the engines of the era didn't the valves were at a pretty good angle in relationship to the deck increasing flow potential (this was on all of them not just the fast ones). You can make anything fast in perspective, you would have a hard time making a prewar engine out run a new mustang but it would defiantly be a fast prewar car with some fairly simple tricks.