compression |
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fordpower
Senior Member Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1763 |
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Posted: 12-February-2012 at 9:19AM |
how do you figure comp ratio.
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Blueoval76
Senior Member Member of the Stroker Club Joined: 20-February-2010 Location: Sussex WI Status: Offline Points: 698 |
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With this....
You have to know these details to get an accurate number.
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68 Galaxie Wagon 390/auto/2.70
03 Bonneville some mods |
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fordpower
Senior Member Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1763 |
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Thanks.How do you measure chambervolume,
.would have to tear down to get deck hight. |
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Blueoval76
Senior Member Member of the Stroker Club Joined: 20-February-2010 Location: Sussex WI Status: Offline Points: 698 |
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Only way to get the number is tearing it down and measuring, or knowing exactly what you have. We may be able to figure out the chamber by you telling us what it is you are working with. Is this a stock 19?? motor untouched, a rebuilt motor, or a shop built motor? If you have a stock factory motor we can get the specs for the year motor you have. If it is a performance unknown build then it will be harder and we would need the part number off the heads to get the chamber size. The chamber is measured by using a piece of plastic wrap, little grease, piece of plastic with a hole, and a syrange with CC measurment on it. You have to fill one chamber and see how many CC's you used to get the chamber voulme. Hope that helps. |
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68 Galaxie Wagon 390/auto/2.70
03 Bonneville some mods |
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fordpower
Senior Member Joined: 02-September-2010 Location: willseyville,ny Status: Offline Points: 1763 |
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Thanks.Its a 302 in my pinto. Person who put it in said it is a 302 40 over with reworked heads. they have roller lifters .All I know is it has 174# compression.
right now I am trying to pull it out. |
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Psquare75
Admin Group Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4591 |
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Isn't there a way to sorta 'guesstimate' at it via cranking compression and cam shaft specs?
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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ilyes
Senior Member Joined: 09-January-2010 Location: Philadelphia PA Status: Offline Points: 3782 |
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there is, it has been posted last week, but i don't remember on which thread
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