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Old 02-15-2008, 02:43 PM
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Quick compression ratio guess?

I've got a 350, bored .030 over. I 've got the 14014416 305 heads that have supposedly been opened up for 1.94 intake valves. I don't want to pull the heads just to check, so I will have to take his word for it. I know these heads have the 58cc chambers, so that should raise the compression ratio a bit. Is there a quick and dirty formula I can use to determine the CR given the information I have? If I need more information, let me know and I will track it down.

thanks

stu...

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Old 02-15-2008, 02:47 PM
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Here's a compression ratio calculator.
.
http://www.bgsoflex.com/cr.html
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Old 02-16-2008, 08:06 AM
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Quote:
If I need more information, let me know and I will track it down.
Ayuh,.....

You'll have to cc the heads because they've been altered,....
You need to know the thickness of the headgasket,....
You need to know how far down the bore the pistons sit at TDC....
And,.....
You need to know how big the piston dish is....

In other words,....
Unless you tear down the motor,......
You'll be lacking 4 of the 6 measurements needed to find the Comp. Ratio.....
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Old 02-16-2008, 08:44 AM
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Hehe, I kinda figured it wasn't going to be as easy as I had hoped. Not a big deal as I have more important things to concentrate on at this point. I realized once I started using the calculators that I could change my CR by a point and a half just by spec'ing a different piston. Obviously, I need some more information. I'm just going to run it as it is for now and we'll see what the future brings.


stu...
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