| | | quote | Anyone know how do the hp & torque #s compare between this set up &
a stock L67 sc (240 hp, 280 ftlbs) or stock L32 sc (260 hp, 280 ftlbs)? |
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The s2 vs s3 thing is all covered in the blower / tune. The s3 motors used the Gen5 blower which gives that extra power gain. For the most part, a gen3 with a pulley swap will make just as much power as a pulley swapped gen5, on a mostly stock motor. (again, for the most part)
The na blocks (L36 and L26) are both the same, with the exception of the mid05+ motors getting a different (but imo not any stronger) rod. These motors have repeatably made well over 600 crank horsepower in daily drivers, so reliability compared to the SC blocks is pretty indifferent.
The "pulley size" question doesnt really matter after you add in a decent cam/exhaust or probably most importantly an intercooler. The compression at that point just becomes more horsepower at the end of the day. I wouldnt really try to make a bunch of power on a SC block through a m90.
Remember that if you buy a NA block, you will still need 50% of a SC motor to put the blower on. The short list includes:
heads
crank pulley
injectors
fuel rail
sc brackets
throttle body (not always)
blower
