rodneybarrett

iTrader: (50)

ok guys, I have looked at both a MT12 button and a new NS series (both an X12 and Top TSR12) button and sure enough the newer button is much thicker. Both standard and turbo.

My question is why did it change? When I look at them side by side, nothing else has changed except the thickness. Everything else is the same.


I have read the posts above long stroke versus short stroke but that really doesn't have anything to do with the button. The button sits on top of the sleeve which would be the same for all engines.

Hopefully someone can shed some light on this.

I can post pictures if needed.

rodneybarrett

iTrader: (50)

I just found out one thing. The new NS series head will not work with the old "thinner" buttons. But I don't see why you just couldn't use an old head with it.

ilaybrk

the heads are enterchangeable the button are difrent in thickness but the depth on the head are the same. The old mt and rs moters the sleve was higher than the block and the new NS series engines the sleve is flush so you can use the thick button on the old mt blocks but you cant use the thin button on any block but the mt based. just my .2cents

e420x

Where can I buy a turbo button hedad for my x12?

Scott Fisher

iTrader: (28)

I got mine from nitrohouse. Remember, that a top, rex, or Novarossi button will fit.

e420x

Which one did you order exactly? Did you also shim it to run 30%?

Scott Fisher

iTrader: (28)

I didn't order a specific brand as they are all exactly the same. The one that I ended up getting is a TOP. I added a .1mm shim to the existing shim, although Mugen USA claims I do not need to add a shim. They routinely run 40% nitro and claim they add no shims. I do not get free p/s and conrods, so I decided to err on the side of caution. The other reason I decided to do this, is because the engine O'Donnell sent me (Nova NS12S3A1) which is basically the same, he added a shim before he sent it to me.