I remember when Apple iPhones were brand new, someones first thought when the dazzling arrays of APP possibilities was placed before them decided to make a compression calculator
God bless their clever noodles
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| Compression Ratio Quick Calculator https://www.ausmini.com/forums/viewtopic.php?f=2&t=92248 |
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| Author: | timmy201 [ Wed Mar 30, 2016 2:10 pm ] |
| Post subject: | Compression Ratio Quick Calculator |
I've just found this online calculator, it seems to work pretty well. It doesn't list every possible piston size, combination and parameter, but it is enough to get a general idea of how it all works. http://www.podifold.com/compression.html The nominal cylinder head volumes can be found here. http://www.minimania.com/Cylinder_head_ ... ing_number |
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| Author: | Mick [ Wed Mar 30, 2016 6:24 pm ] |
| Post subject: | Re: Compression Ratio Quick Calculator |
I remember when Apple iPhones were brand new, someones first thought when the dazzling arrays of APP possibilities was placed before them decided to make a compression calculator God bless their clever noodles
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| Author: | TheMiniMan [ Wed Mar 30, 2016 6:34 pm ] |
| Post subject: | Re: Compression Ratio Quick Calculator |
CV + SV divided by CV CV being combusted volume SV being Swept Volume CC tools needed are a Burette, a sheet of perspex/plastic big enough to cover the cyl head chamber & bore,,, smear a thing smidge of grease on the surface, squish the plastic down firm & fill with burette full of kero/metho etc make sure you fit a spark plug & valves into the cyl head make sure you run a slight bit of grease around the bore & bring piston up to TDC (top dead center) fill with burette, add the chamber vol To the (approx) 3.5cc in the head gasket plus the vol above the piston at TDC , all together & that`s your CV divide your engine size by 4,,, giving one cyl swept volume divide the SV by the CV & add one the answer is your compression ratio easy-peasy if you want examples then list what you have & i`ll do it for you here so you all can see how easy it really is it may sound like there`s lots in it & it`s all too confusing but it`s not really it`s a piece of pi$$ i do it to every single engine we build to make sure we are spot-on too much & you`ll ping too little & it`ll be a bit doe-y |
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| Author: | simon k [ Thu Mar 31, 2016 3:06 pm ] |
| Post subject: | Re: Compression Ratio Quick Calculator |
jack up the front of the car so that the spark plug holes are horizontal (spark plugs are vertical) pick a cylinder that has both valves closed. Fill the cylinder with light oil using a big syringe |
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