I could be wrong, but isn't a 1:2 ratio cutting the RPM's in half?
Modified Grand Daddy Build
- Thread starter Econdron
- Start date
Denny
Canned Monster
It’s just an inch or two taller tire. It will be fine with a 6:1 gear ratio.
In my previous post, I mentioned I added the FNR transmission which in itself has a 1:2 gear ratio. It has a 12T gear on it and my drive sprocket is 60T, so that would mean I have a 1:10 gear reduction, correct? I had to order another sprocket anyway because the transmission came with a #530 chain size sprocket with a splined shaft. I was having a really hard time finding a #41 replacement for that, so I just ordered a #530 sprocket with 32T. So now I'll have a 1:5.33 gear ratio.
BaconBitRacing
Well-known member
With your tire size that might be a bit high. Really, really depends on how it's driven. Slower, torque based off roading is going to want a lot lower ratio than the 1:5.33. How tall are the tires? That will give the experts here a chance on gear ratio. You do have a big-block so that helps with torque.
BaconBitRacing
Well-known member
I'll let the guys with experience chime in. Since you already ordered it, the only harm in trying is what, a few minutes changing it out if it doesn't work?
Denny
Canned Monster
You’re probably better off sticking with what you have then. You may still have to drop down to a 10 tooth drive sprocket.
jameslb_26
New member
Old thread but did he ever finish the modified plans?
Denny
Canned Monster
The world may never know?
Sorry for the delay in response. We have the kart still sitting in the shop. The framework and guts are all functional. We really just need to add the floor, make some sheet metal skin and decorate it, maybe do some fine tuning, but we got pretty busy and little side projects like this are on the bottom of the list unfortunately. I'd be more than happy to send the CAD files and/or screenshots of the frame dimensions that I have drawn up if anyone is interested. Just message me your email address and I can email them to you.