scott n

hello guys,
I have a ntc3 and im putting a os 12tr engine. and I have to convert it over to starter box starting.
so I order the non-pull flywheel.
well heres were im confused...........

the pull start flywheel has a bigger diameter then the non-pull flywheel ?????

why is that??
I would think that I would need the bigger dia. flywheel so I can use my starter box, right ??

Anthoop

Yes, if there is an option for a box/pullstart flywheel then I would expect the box flywheel to be a larger diameter......
Put some pictures/links to what you have bought.

Big Alice

The non ps motor mounts are a bit shorter so the motor sits lower in the chassis. You can use the ps motor mounts with the ps flywheel on a starter box but if you try to use the non ps flywheel you have to use non ps mounts.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXBMF1

scott n

pic..........

left= non-pull flywheel
right=pull flywheel

and ya I picked up.....
non-pull motor mounts
non-pull flywheel
rear exhaust header
duel chamber ft pipe

just so I could put this engine in my ntc3 and use a bump box.

scott n

here are the links..

non-pull..
http://www3.towerhobbies.com/cgi-bin...&I=LXBMD9&P=OW

pull start flywheel...
http://www3.towerhobbies.com/cgi-bin...&I=LXBME0&P=OW


non-pull dia. 32.76mm
pull start flywheel dia. 37.75mm

scott n

a pic of both motor mounts I have.

left= pull start mount
right= non-pull mount.


pull start mount 18.33mm
non-pull mount 14.37mm

Anthoop

Ah right, that would make sense then....the flywheel is used in conjunction with different engine mounts. As Big Alice said, use the small wheel with the low mounts.

scott n

when I was screwing with the car it hit me........... duh...
your right about using the smaller flywheel with the smaller mounts.
I was trying different combos and that just seemed to make cents.
thanks guys.

skyraider71

I would have gotten a machined, lightened flywheel. Yes it cost a little more, but you get
less reciprocating weight, and better throttle response.

scott n

yes already order one off ebay. a blue one. ya should have don't that first but was not thinking.

as I have ordered a lot of upgrades for this car.

thanks...