Quote:
Originally Posted by Tcoat
I took my 70 Coronet from 370HP to 600 and it damn near ruined to for street use but not sure about the relevance to the Twins.
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That's because a 600 horsepower ANYTHING in 1975 was a full-tilt, race-only motor with gigantic cam, gigantic compression, gigantic headers, carb, etc. Today, 600 horsepower will idle under 1000rpm, in traffic with the A/C on, and still sail through an emissions test like nothing.