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1750 compression ratio

2K views 8 replies 4 participants last post by  Deepend 
#1 ·
Can anyone quote the original compression ratio for a 1750 SPICA engine, type 105.51?

Plus, any idea of how much that would change by shaving the head .005"?

Thanks
 
#9 ·
Correction:
The calculated compression ratio with that head on a 1600 block with 1750 pistons is 9.0:1. (The 8.6:1 result corresponds to a stock 1600 block.)

It is certainly preferable to measure it. Just trying to get in the ballpark here as a starting point.
 
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