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need help with comp ratio

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Old Aug 2, 2005 | 08:15 PM
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anyone know how to get your compression ratio? the formula, or a quick way? i was told that the comp ratiowas 13:1 w/ a .041 gasket, but my buddy said he thinks it will be higher. and i want to be certain. thanks in advance
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Old Aug 2, 2005 | 08:47 PM
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Use strawberry jam-- 1 berry per comp. ratio

Im a

Hey did you ever find out about the lifters??
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Old Aug 2, 2005 | 09:41 PM
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http://www.csgnetwork.com/compcalc.html
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Old Aug 3, 2005 | 03:49 AM
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use comp tester ....They go for 30-40 bucks ....just get the starter on so you can spin it. Need help Mike let me know I could probbly find one for you this weekend/
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Old Aug 3, 2005 | 05:00 AM
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Originally Posted by primetime1267
Use strawberry jam-- 1 berry per comp. ratio

Im a

Hey did you ever find out about the lifters??
wise ass! lifters- not yet
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Old Aug 3, 2005 | 05:01 AM
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A compression tester won't work.

The most accurate way to figure it out is to "pour" the engine. You will need a CC buret for this.

You need to have everything ready for your final assembly. Install the crank, one rod, one piston, with the top compression ring installed. Make sure to put some grease on the ring. Next, install your cylinder head with a head gasket and torque it down. Preferably with a gasket that has been compressed already. Then, tilt the engine over so the spark plug hole is facing up. Fill the cylinder through the spark plug hole with fluid, making sure to get all the air out.

When you get that number, let me know what it is, and I will be able to tell you what your compression ratio will be.
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Old Aug 3, 2005 | 05:26 AM
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what is it cc's? can i still do it if its in the car? thanks joe
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Old Aug 3, 2005 | 06:59 AM
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You have to disassemble the motor that is why I said to use a comp ratio tool and it does work has many times.... Its easy quick and less time consuming also no worry's of messing up your motor./
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Old Aug 3, 2005 | 01:08 PM
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a compression "tester" will only tell you what each cylinder is pumping, and allow you to determine if you've got rings going, leaking valves, etc.

not sure what you're referring to as a "compression ratio tool". There isn't any device (that I know of) that would take into consideration all of the variables (cam lift, durration, etc) that would allow a plug and play type setup..

please explain..
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Old Aug 3, 2005 | 01:13 PM
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Originally Posted by Strokd85
a compression "tester" will only tell you what each cylinder is pumping, and allow you to determine if you've got rings going, leaking valves, etc.

not sure what you're referring to as a "compression ratio tool". There isn't any device (that I know of) that would take into consideration all of the variables (cam lift, durration, etc) that would allow a plug and play type setup..

please explain..


i'm with you on this one, i'm pretty lost as to what he's even asking...



just tell us the combo and i'm sure someone can tell you what you want to know. you said something about head gasket thickness. are you going up or down? as that all your trying to find out?
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