Which has more horsepower potential - LS3 or LS7
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Which has more horsepower potential - LS3 or LS7 Which engine can you get more horsepower out of while keeping the risk of breakage low and without changing any major internal engine components - an LS3 or LS7?
The LS7. It has better ports, better valve angle, better intake manifold, and larger bore for less valve shrouding, lighter rotating assembley and lighter valvetrain, rods and crank are better than ls3. That is just some of the differences...both engines have cast pistons which is a weak point.
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For an NA application (which might involve internal changes and wouldn't exactly fit the criteria here...or even just bolt ons) I would think the LS7 would still be better but if going forced induction or nitrous I would think that the LS3 (and LS2) might be better.
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For NA or Nitrous the LS7 hands down. The 'nice' thing about nitrous is that it is not affected nearly as much as FI for higher compression. My old 383 was running 12:1 and it loved nitrous 
For FI, the LS3 is a far better choice.
One thing to keep in mind, the risk of breakage goes up equally with increacing the horsepower above stock.
Keith
For FI, the LS3 is a far better choice.One thing to keep in mind, the risk of breakage goes up equally with increacing the horsepower above stock.
Keith
