GM/Merc Dimple Rods ??
#11
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The bolts are already 3/8" ARP bolts, so how much would really be gained by going to ARP 7/16" ???? Don't they have the same tensile strength (like 70,000# ??) I only plan about 550hp NA and 5200-5400 rpm......
#13
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blown formula,
You'll be fine with the 3/8" rod bolts. There is more material surounding the 3/8" rod bolt rod/cap which gives it more stength you just need to do like bobby and blown 1500 say; have them checked out to see if they need reconditioning, magnafluxed and buy/install NEW ARP 3/8" "wave-lock" rod bolts. ARP makes two different kinds of "Wave-Lock" rod bolts. I think one set is a little stronger than the other, but both are probably stronger for the application than what you'll really need them for. I would have loved to have had those rods if I was rebuilding a hi-perf 454 or 502!
You'll be fine with the 3/8" rod bolts. There is more material surounding the 3/8" rod bolt rod/cap which gives it more stength you just need to do like bobby and blown 1500 say; have them checked out to see if they need reconditioning, magnafluxed and buy/install NEW ARP 3/8" "wave-lock" rod bolts. ARP makes two different kinds of "Wave-Lock" rod bolts. I think one set is a little stronger than the other, but both are probably stronger for the application than what you'll really need them for. I would have loved to have had those rods if I was rebuilding a hi-perf 454 or 502!
#18
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My understanding is the 3/8 dimple rods are the 427 L-88 version and the 7/16 dimple are the LS-6 LS-7 style rods, from years ago. I have a brand new polished beam set of the older 7/16 style rods with upgraded Wave-Loc style bolts. When comparing 7/16 to 7/16 rods a 502/502 versus the older LS-7 style rods the older rods are much beefier. I second others in the thread that either are good but use good, new bolts and you won't regret not spending the $70 bucks for them.