Posted by: david targhetta
01/17/2002, 22:12:44
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I think you are right. In fact. that is what my Ford Preformance book suggests. Another question I have is the book mentioned something about "rail rockers", which according the the book is a type of rocker arm that was installed on all 66-78 302's. The book said that these rocker arms are no good for a high lift cam or high rpm. I was wonder if you ever heard of this. (I dont know how accurate that books is) also when i was reading about the cylinder heads I found a part in there that told me that my compression ratio is actually rated at 8.4:1 rather than the pre '77s 8.1:1. It mentioned that the combustion chambers were actually increased BUT the book figured ford changed the type of pistons because the ratio was rated higher. I am very confused!
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Dave, you are right. 8:1 compression is much too low for any sort of performance. I say time and time again that compression=power. The cheapest and easiest way to bump up compression (assuming that you do not want to switch out pistons) is to install a set of closed chambered heads (like the old 289 heads w/ a 53cc chamber) and run the thinnest possible head gasket. I am not sure exactly how much that will give you, but it will surely be at least another point or so and whatever it is will certainly be streetable. I am sure someone else (like Ken or rickyracer) can give you a more accurae picture of what our final CR will be.
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