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Author of "101 Projects"
Join Date: Jan 1995
Location: Rolling Hills Estates, CA
Posts: 27,007
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Without the graphs - it's difficult to tell what the full story is. However, it would make sense to me that there would be very little you could do to increase *total* peak HP out of an engine without making major mechanical changes.
Where I have always understood these chips to show their prime benefit is on the low-end of the RPM range - a range not typically well measured in traditional dyno tests.
-Wayne
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