Originally Posted by
Eivind E
You say that, but when I tried the GX2 crankshaft in the GX5-R, I found that the rod would rub on the crankcase, as there was no longer enough tolerance machined into the groove for the rod to pass cleanly.
Furthermore, simply measuring one of those gold tini coated GX5-R crankshafts vs a GXII crankshaft you can measure a difference on the crank pin, 0.02mm.
(Yes, brand new crankshafts)
I think the reason the rod rubs on the crankcase is that since the pin is thicker, this puts the rod further out towards the crankcase.
So I don't think you can say they are interchangeable.
What you have stated makes no sense.
The external diameter of the 21-0600 rod will not change because the crank pin is .02mm wider - which I believe is totally incorrect anyway.
As long as the pin sits snuggly in the rod end bushing - how can it make a difference ? The only way to alter the arc of the rod end is to increase the rod ends outer diameter, or move the location of the crank pin on the crank.
The 21-0600 rod has been used from the GX Series right through to present day, and the internal diameter of the big end bushing on that 21-0600 rod has not changed over that time......... so why would the crank pin size change ??
I think you either need to get a more accurate micrometer, learn how to use it properly, or stop playing with yourself.
You have a very well known reputation on here that preceeds your posts on multiple forums.
It seems all you do is continually (and annoyingly) pop up and contradict people and look for arguements. You really do need to get outside a little more.
Feel free to reply if you must, but you will be wasting your keystrokes as I won't be around to read it.
Guys - It's been fun talking with all you GO users over the last 7 + years, and I hope I've been of assistance to some of you over that time - but I just can't be bothered with individuals like our friend here anymore, so it's time to say adios from this forum (and RC Tech in general) for the Grizz.
Happy racing and take care out there
