1996 CC build thread

[pjshane]

Originally Posted by BlackHornet

i believe so. i was just answering the question that i read. also, i was on my phone so it doesnt show as much as my computer does. as well as you could be building a cart for all that i know and then i wouldnt know what kind of specs you were going to have, andddddd you didnt say that you were wanting a way to find out the RPMs on your cart.....all you asked was how i knew the RPMs of my cart

OK, I over reacted to what I thought a smarta$$ reply. Sorry. I've never done texting and do not know the limitations.

I suppose there is no way to know how many turns a D & D motor is making. It's not that important, but would be interesting. I have stock gearing. Would my motor be turning the same as your AC motor at 27 mph? If so, I could interpolate the rest.

[GarageBuilt]

Originally Posted by pjshane

OK, I over reacted to what I thought a smarta$$ reply. Sorry. I've never done texting and do not know the limitations.

I suppose there is no way to know how many turns a D & D motor is making. It's not that important, but would be interesting. I have stock gearing. Would my motor be turning the same as your AC motor at 27 mph? If so, I could interpolate the rest.

psjhane,

More than likely not. B/H AC motor turns 6,800 rpm. Check your motor & see what the rpm's are.

Now. If you’re motor can turn 6,800 rpm’s. B/H & you had the same rear gear & the same rear tire height, and then your answer would be yes. Hope this helps.

[kneddor]

Based on the information in your signature, assuming the tires are 18.5" diameter and stock 12.44:1 gears, the motor would have to turn 7250 rpm to reach 32 mph. Hope this helps.

[BlackHornet]

its ok pjshane, you have to love talking online....you cant hear tones and so sometimes things get interpreted wrong. what are some of the other specs on your motor?

[pjshane]

Originally Posted by kneddor

Based on the information in your signature, assuming the tires are 18.5" diameter and stock 12.44:1 gears, the motor would have to turn 7250 rpm to reach 32 mph. Hope this helps.

Yeah, the 12.44:1 ratio really helps. I'll use a tape measure to find the circumference of the rear tires and go from there. Easier yet, I'll put a mark on the tire and floor and see the distance from one revolution. I had forgotten that I am not using stock rear wheels. I had no idea the motor would be turning that fast. No wonder it could fly apart if not controlled by a load.

[BlackHornet]

at 32mph mine hits like 7500 rpm....i let off haha

[GarageBuilt]

Originally Posted by BlackHornet

at 32mph mine hits like 7500 rpm....i let off haha

Are you still talking about your AC motor?

What hand held programmer do you have?

[pjshane]

One revolution of my rear tire spans 56"

At a gear ratio of 12:44:1 (56" / 12.44) equals 4.5 revs per inch

There are 63,360 inches in a mile (12 X 5,280) which would equal 14,080 revs per mile (63,360 / 4.5)

It will take 380,160 revs for 27 miles (14,080 X 27)

If those 380,160 revs are done over an hour, that would be 6,336 rpm (380,160 / 60 minutes)

6,336 rpm sounds about right comparing with BlackHornet's measurement. Small rounding errors were ignored.

Working backwards now, if I cut the 6,336 rpm by 27 mph, I get 235 rpm for 1 mph and can do the math for any other speed.

I know you guys are going to double check my math and some of you will come up with a more elegant way of expressing the formula.

[BlackHornet]

Originally Posted by GarageBuilt

Are you still talking about your AC motor?

What hand held programmer do you have?

ya. i dont have the programmer.. PM me and lets get something goin haha

[GarageBuilt]

BH you need to clear out & make some space in your Private Messages.
So are you thru with the build yet? You ready to turn it into a drag racing cart yet. Let's do it.