tohatsu flywheel

[yankee]

Hey all you Rupp Tohatsu Guru's are there any differences in '71,'72,'73 400-440 Tohatsu point type ignition flywheels??
like from an American to a Nitro or Magnum or Yankee?? are all the advance mechanizems sprung
or weighted the same?This maybe easily answered by looking at part numbers for flywheel assembly's
for the various models,but I only have a '71 book.I'm building an S type engine with point ignition
but don't have a flywheel and I'm guessing I'm going to find one off of a standard type engine before I
find one from an S type engine,just want to make sure they are the same and no performance differece.
Thanks to those that respond,Yankee

[dacota25d]

Yep all points magnetos are the same on 400 and 440. 295 and 340 are smaller

[magnesium]

Anyone wonder how the same set-up can be right for different engines? Luke brought this up the other day, about Rupp using the same pipes on all the Xenoahs,250-440. Maybe the flywheel and stator from a TR440 is the same as a TR440S. Is the timing curve the same, too? The same as on a 71 440SR? I'll bet that racers tried different weight and spring combinations. Bob Urry showed me a trick with the points. Take the spring from an old set of points and add it to the new set. You have to bend the spring set a bit to weaken it. I think that the points were supposed to open with 15-16 ounces of pull with a fish scale. All this was meant to raise the RPM of the motor before the points started to bounce. Old school stuff. Racers now have programmable CDI's,launch control,etc...