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One problem with the B20 horsepower ratings is that they are
typically the inflated horsepower rating from the sixties that don't use
the same scale as modern HP ratings. Numbers I've seen for the
1975 B20F using the modern scale put it at almost 100 and I
doubt that the cam + compression boosts it all the way up to
130; I'd guess that a well tuned B20E makes more like 115 or so
in HP comparable to modern cars. Unless you go to 10,000 rpm...
What are the biggest HP numbers using the modern scale that
people have seen on a dyno from a NA B20 type motor?
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