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compression

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fordpower View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fordpower Quote  Post ReplyReply Direct Link To This Post Topic: compression
    Posted: 12-February-2012 at 9:19AM
how do you figure comp ratio.
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Blueoval76 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Blueoval76 Quote  Post ReplyReply Direct Link To This Post Posted: 12-February-2012 at 9:22AM
With this....
 
 
You have to know these details to get an accurate number.
68 Galaxie Wagon 390/auto/2.70
03 Bonneville some mods
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fordpower View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fordpower Quote  Post ReplyReply Direct Link To This Post Posted: 13-February-2012 at 8:51AM
Thanks.How do you measure chambervolume,
.would have to tear down to get deck hight.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Blueoval76 Quote  Post ReplyReply Direct Link To This Post Posted: 14-February-2012 at 8:38AM

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. Wink Hope that helps.   

68 Galaxie Wagon 390/auto/2.70
03 Bonneville some mods
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fordpower View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fordpower Quote  Post ReplyReply Direct Link To This Post Posted: 15-February-2012 at 1:59AM
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 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Psquare75 Quote  Post ReplyReply Direct Link To This Post Posted: 15-February-2012 at 2:36AM
Isn't there a way to sorta 'guesstimate' at it via cranking compression and cam shaft specs? 
Paul
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ilyes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ilyes Quote  Post ReplyReply Direct Link To This Post Posted: 15-February-2012 at 3:37AM
there is, it has been posted last week, but i don't remember on which thread
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