LS3 Crate Motor Build - Late Crate Update, Part 2

Modified GMPP LS3 vs 417 Stroker
The graph tells the tale, as the 417 stroker offered significant power and torque gains through the entire rev range, increasing the power output of the LS3 from 569 hp and 522 lb-ft of torque to 608 hp and 570 lb-ft of torque. The gains were as high as 50 hp and 60 lb-ft of torque elsewhere in the curve, but the solid torque gain is something that can be enjoyed every time you even tickle the loud pedal. Not shown on the graph is the fact that the new combination improved the idle quality (by nearly 1 inch of vacuum at idle). Having all that extra torque means less need to rev the engine, though the stroker pulled hard to 6,500 rpm and beyond. We can't wait to see what happens when we add boost!

*Includes ARP head studs, Fel-Pro MLS head gaskets, new timing chain, and oil pump.
**Scoggin-Dickey Parts Center