if your building engines frequently this is a tool that will allow you to get things exactly correct!
that's not always 100% mandatory, in this case
If you only have a decent torque wrench and you think you need a rod bolt
stretch gauge,
Id point out that hundreds of thousands of engines are assembled and run very successfully being assembled with a torque wrench, a stretch gauge is great, but its hardly cost effective on a one time engine build,
just use a torque wrench and ARP rod bolts coated in marvel mystery oil,
and tighten the rod bolts, in 3-4 stages to full spec torque, three times and loosen them twice so on the last cycle they are brought up to spec torque, this smooths out the tread surface, removes burrs and tends to help consistency, Ive double checked the rod bolt
stretch gauge readings against against the torque wrench results many times, you'll save a lot of head aches and you'll be close to correct stretched length on the third cycle or any past that number, bolts tend to stabilize under repeated tension as long as their not over stretched, and the suggested torque wrench settings will not over
stretch them, it will generally put you at about 5%-7% less clamp force but certainly far exceeding stock fastener specs, for BOTH consistency and strenght ,but you can,t just add that to the torque wrench setting , or you'll get erratic results,and potentially over
stretch the bolts in rare cases
http://www.amazon.com/PREMIUM-OUTSIDE-M ... B000ZJPR5Ehttp://www.amazon.com/dp/B000JMW4AS/ref ... B000JMW4ASWATCH THIS VIDEONEVER USE A TORQUE WRENCH LIKE A BREAKER BAR TO LOOSEN BOLTS as it TENDS TO QUICKLY DESTROY ITS ACCURACY & consistency http://www.youtube.com/watch?v=zgwwOJ0B ... r_embeddedhttp://www.norbar.com/Products/tabid/54 ... fault.aspx
