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Old 03-07-2013, 02:26 PM
ap72 ap72 is online now
How fast is fast enough?
 
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They are pretty close with only a few subtle differences-
a hair less duration (better for lower RPM power)
a hair wider LSA (better for your heads and application)
a hair tighter lash (quieter and usually more durable)

Overall there's probably not even a 15hp difference between the two.


EFI is also something to consider, it really makes a hell of a difference on power, economy, and durability. You can cobble together a system with a bunch of used parts for a few hundred bucks, even a basic TBI system would be a good starting point.
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