Originally Posted by
22Racer
I assume you are talking about me "undermine others position to make themselves look better" I was stating that I was not seeing a difference in the 2 rod part # bushing dia. How exactly does that make me undermine you?? You are the one that came on here confusing people, telling them they couldn't run the new rods in old motors or vice versa. Maybe the old rod was smaller, but they are not available. As Trey said the Factory says both rods are interchangeable. You are coming off like it will ruin the motor if you run the wrong rod, it is a very small difference and is not that big of a deal. Still yesterday you posted to someone there was no rod that will fit that engine, talking about an older gen 4. even the new 21-0600 will fit it just fine.
Rex
Assumptions is whats caused this whole mess in the first place.
Yes a 21-0600 will fit a gen 4 and 5 but wait till you get to about half a gallon and see what happens to the big end of the rod. If the crank pin is 4.8 mm dia in that engine and the Rod is 4.99 there is too much slop and will eventually break. You of all people should understand that. The relationship between tolerances of said parts is crutial to a long lasting engine. the correct new tolerance fit between the components should be 0.07 mm.
The 21-0600 is designed for the MG and GX range of engines , it has been cut to enhance the engines static and inertia balancing. Yes you can run a new 28-0600 rod in it but the whole point to developing an engine is to get the most out of it ... recommending the RTR rod is going backwards.
Even measuring tolerances down past 0.00 mm is useless unless you have material that wont change its physicality with ambient temp. Pretty much every component in any RC engine will expand and contract with ambient temps when you get that far down in incriments.
The whole reason this thread was started was to HELP people get accurate information on the Go Engine range and hopefully to rid dissemination of misinformation. And you are not helping .
Kind Regards
MM