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Old 02-22-2008, 12:25 PM
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From the specs I gather the earlier L98s had 9.5:1 compression and the 1991 recieved 10:1. only a half point in compression is worth very little in means of power, a half point raise would give it about five more horses.
You can look at the year specs here:
http://www.100megsfree4.com/corvette/1990/vet91.htm
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