Originally posted by DanielSon
Con-rods fail. They are designed that on purpose, They gotta make money somehow. You only speak of basic alloys that are well known to the public, there are way better alloys that are not widely used that exceed 7075 and other aluminum based alloys, and what condition of 7075 do you speak of?
I not negate that conrods fail, but there's a such high probability that you should change it due to bushing wear than a snapped unit. Engine manufacturers refrain on putting weak elements on their engines, are the faulty use that makes it break (heard some quite big freerevs on the boxes and on my internals said, blow it please, blow it please) some people thinks that doing such manouvers will show how 'powerful' and how noisy are their engines.
Changed my last conrod on an engine with more than 7 gallons thru it (a Sirio .21 AAC) who uses a 'weak conrod' said by some people who broke one.
Well, if you plan to dig on 'exotic Aluminium alloys' like 7450 and such similar, go yourself and put a quote for a billet/rod of those type of alloys (probably they force you to order a minimum weight and probably excessive for you.
The problem with blowing conrods is fixed putting a larger 2nd gear that lowers a little the rpms as told time ago popsracer not a harder conrod that probably break the crank nipple.