Just got a report from a friend(Bviernow). He did a 686 Wiesco 10.75 to 1(used out of my race rhino, we just honed it and got new rings and pin), racers edge head, stage 2 cam(again out of my race rhino), mikuni 45, tri fire cdi. It had a woods pipe already. Also he did a fluidyne radiator. He is hitting 65 in the whoops at ocotillo wells. Awsome acceleration too. Machined Sheave, blue spring and 12 gram weights.
We didn't do a rod as we ran out of funds. Would certainly have liked to, but I am a firm believer that if you use good synthetic oul, keep the ignition, fuel and compression correct to not detonate and have the proper jetting the stock rod will last a very long time. Every rod failure I have seen was related to the top end pin seizing either due to detonation or lack of lubrication. I ran the stock rod on my 686 for a long time, overheated it in many races sometimes running 275+ for hours on end in desert races. No problem with the rod, still looks perfect.
That said, when I built my new 727 motor I did replace the rod, weld the crank, do the middle drive gear plate ect.
Last edited by azcourt; 11-29-2008 at 11:07 AM.