Originally Posted by
TXRC8racer
Well my RB S7 finally wore out this past weekend. It had TKO ceramic bearings and turbo head and man this motor screamed with this combo with a JP3 pipe with Byron's 30%. This motor had over 11 gallons on it and it only got repinched once. But the bushing on the ConRod finally broke apart but still stayed in the rod..So I need a conrod and I think this motor still has a few more gallons left in it!! No RB motors in stock around here so for a big race this next weekend I bought a Werks B5..
If your plan is to eventually replace the conrod in the S7 you should pull the engine totally apart and make sure everything else is in good condition. If you ran the same rod in the engine for all 11 gallons it's very likely that there was some slop where it connected to the crank and may have wore out the crank pin slightly. Use some calipers and make sure the pin measures the same all the way around and does not have an oval or egg shape to it. If the crank and rod both need replaced it may be a better idea to just replace the engine.
Last edited by Chris Peralta; 11-28-2009 at 11:03 PM.