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Old 04-17-2007, 04:44 PM   #1
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Default '99 Compression Ratio w/ +.020 Wisecos

I've read that the '99 1.8 has a 9.5:1 compression ratio stock and I know my motor has the been bored .020 over with the wiseco pistons. I don't however know how to compute my current compression ratio but do figure it to be closer to 9:1. Is this correct?
I also am curious because when setting my reqfuel in MS i don't know the actual engine size that I should enter in ccs. I know 1800cc is close enough but it would be nice to know what I really have in the car now. Can anyone here help me using some of their math skills?

Compression Height: 1.201
Bore Size: 3.2874
Head was decked : .007 for straightness

Last edited by cjernigan; 04-17-2007 at 04:56 PM.
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Old 04-17-2007, 04:49 PM   #2
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Old 04-17-2007, 04:53 PM   #3
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i've got it at 1862 from a stock of 1839

damn, thats 265 more than a 1.6.
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Old 04-17-2007, 05:01 PM   #4
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http://www.csgnetwork.com/compcalc.html

This would be a sweet tool if i had all the required information.
Which I don't currently.
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Old 04-17-2007, 05:23 PM   #5
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You need to know the piston dome/dish cc's, headgasket thickness, stroke, bore, and head chamber volume.
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