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Meany Head
2000 RSC
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10,236 Posts
scoobyrs25 & tydon have pretty much hit this issue spot on.. Plus, when you increase RPM, you increase stress on your con rods by an exponential rate. I don't have it in front of me, but there is a section in the book "Maximum Boost" that talks about stress on engine parts.
 

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05 LGT limited
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405 Posts
Short stroke engines are the ticket for high R's, but the pistons and rods have to strong. The main limiting factor in the bottom end of the engine is (from what I've been told by a few engineers and engine builders) the wrist pin, and small end of the rod. As piston speeds climb, these parts take an incredible beating. Another engineer told me one time that one of the toughest tests you could subject any mechanical part to is to accelerate it to high speed, and make it change directions... that's exactly what the pistons do, continuosly.
 

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RSTi, STi V6, BRZ Turbo
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6,318 Posts
Discussion Starter · #24 ·
Well, none of this matters without an electronic way to raise our RPMs. Looks like a new ecu for me.
 
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