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Originally Posted by Excaliber
Yup, 667 horse, 1964 high rise heads and 1964 2X4 intake. I'm not sure those new "modern" Edelbrock heads or whatever have a BIG advantage over the stock high riser units. My heads are not "ported" or "polished", just good ol' 64 iron (sodium valves)! The pistons are identical to what they had back then, 12.5 to 1 compression (when you could actually buy 100 octane).
So how in the heck can it produce THAT much horse power? Gotta be the 427's were underated "back in the day" at 425 horse. That had to be for "insurance reasons"!
OR,,, could it be the modern roller lifter camshaft? Maybe thats all it is. Anyway the only part that "broke" on my engine WAS the freakin' modern roller lifter! 
Engine's out now, rebuilding with lower compression pistons and a flat tappet cam. Smaller carbs with vacuum secondary. I got to "tame" this beast, at 667 horse I was barely able to drive it on the street! |
I think you are a bit optimistic with your 667 horses, I remember back in the sixties, I was a kid then, I went to "Le Mans" every year and I saw the GT40s' win (Powered by small block engines) The only one powered by a 427 was the MKIV and I was there as well when they won. The FE engines were rated @ 450HP and this was a lot of power compared to the 4liter Ferraris' @ 350-375HP. The cars at Le Mans took a lot of beating and many did not finish. The 427 was very powerful and more reliable compared to the Ferrari motor and that's why they won. It was said at the time that they were about bone stock! (I am sure with carefull assembly and balancing). After the MKIV, the Gulf GT40s' were again powered by small blocks. Then came the Porsche 917 which was even more powerful and reliable and that's why they won.
My point is, in the sixties, most big block road race motor put out @ 450 HP. The 427 SOHC maybe a little more. In drag racing, people got a lot more power but with special fuels and for a few seconds. Let's come back to reality here!!!
