make-a-wish build

[dwon5]

ok that is all ordered and I also picked up 40' of wire loom

[dwon5]

well everything is back off the cart all the parts i don't need have been removed now just wait for all the new to get hare. the motor is boxed and redy to ship down to PQ on monday.Mike64 came over and helped keep track of every thing so if i lost anything he'll know where to find it.the parts i do not need any more will be list in parts for sale

[andy4639]

Good start. I'm going to be keeping tabs on your progress Dave!

[dwon5]

Good start. I'm going to be keeping tabs on your progress Dave!

andy when it's done I'm going to try to get down your way. ther has to be some kind of big event down there

[andy4639]

There is the Run to the Sun biggest car show on the east coast. Myrtle beach SC.

http://www.peedeestreetrodders.com/


http://www.peedeestreetrodders.com/registration12.pdf

[dwon5]

I'LL TRY TO HAVE EVERY IN AND WORKING PROPERLY by then

[andy4639]

Dave,
I answered your PM with the Same info but this is for others to watch for.

http://www.charlotte-autofair.com/


This is one of the biggest car show swap meet's in the country.

[dwon5]

well the motor is boxed and readt to ship of to PLUMQUICK

[dwon5]

i want every one to know that the University of Toledo, College of Engineering is going to design and make a 8/1 speed gear set for this cart. Dr. Matt Franchetti is going to oversee the project

[dougmcp]

i want every one to know that the University of Toledo, College of Engineering is going to design and make a 8/1 speed gear set for this cart. Dr. Matt Franchetti is going to oversee the project

That's great! Be sure to let Robby know so the motor will accommodate the 50% taller gear ratio.

[dwon5]

That's great! Be sure to let Robby know so the motor will accommodate the 50% taller gear ratio.

did not think of that thanks Doug

[dougmcp]

After thinking about the 8:1 rear gear, I had some other thoughts. If you can get Robby to wind the motor for 36v at 4350rpm, applying 48v to it would give you 5800rpm. That speed with the 18.5" Hoosiers and the stock 12.44 gear ratio will give you a speed of about 26mph.
I'm not sure that going to an 8:1 rear end will give you enough torque plus if you have the battery power at the same figures as above the speed if you can achieve it would be 40mph and that may be a little too fast for the cart in the hands of the general public.
Just thinking ahead, considering LSV speeds for street legal carts are limited to 25mph, anything over that may place liabilities on Make-A-Wish that they may not be comfortable with.
I like speed as much as anyone, my cart runs just about 30mph and it is something that requires paying really close attention.

[dwon5]

after discussing this with Robby. He advised that I should not go to that ratio but leave it stock now U Of T wants to have some part in the build I just have to figure out what. If the motor is wound for 3600 rpms at 36volt. If ran at 48 volts and the tire size is actually 20.5 dia. what would that speed be?

[dougmcp]

With those specs, somewhere between 23-24mph, can he wind the motor for a faster rpm than 3600?
Each 200rpm increase from 3600 on the 36v motor will increase the speed 1.3mph at 48v.

[dwon5]

ok here is the math
4/3=X/3600
3X=14400
x=14400/3 thus rpm max power is 4800
4800rpm 10.5:1 gear ratio 20.5 diameter tires equates to approx.29.3 max mph that should be fast enough for the person that wins the cart maybe not for you Andy (the man with the need for speed) that way the University of Toledo can still do something