Thread: How do they come up with this Compression Ratio?
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Old 10-20-2019, 04:20 PM
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footjoy footjoy is offline
Chief Ponti-yacker
  
Join Date: Oct 2009
Location: KC
Posts: 977
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Ok so pontiac charts are not exact. But I see alot of people on here using those numbers to discuss engine build.

When I picked up my heads after 4 months the guy said he forgot to CC them by that time I just wanted to get them and move on.

My 15s are the big chamber not the ones I listed in the OP they are listed 85-87cc but in reality could go 90

Thanks

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