64 volts on a bad boy?

00ClubDs · 07-08-2009, 04:08 PM

Now I know it has been stated that high torque motors are the way to go with higher voltage, but how many rpms can you get away with on a high speed motor? Would 64 volts be too much? I have calculated that a D-380 would spin 7600rpm @ 64 volts, but would that burn it up or blow it to pieces?

Nate · 07-08-2009, 09:51 PM

D-380 motors are good 8000 RPM from PQ because they test them. It should be OK on a stock motor as well to 8000 RPM but be careful. If you go down a hill your 64V could over-speed the motor, 64V is right on the edge. User must be aware of what is going on.
I ran 120V on a PQ D-380 with out issue but watched the RPMs closely... except for that one time I was racing a car

BlackHornet · 07-08-2009, 10:46 PM

sorry to derail but...please share this story nate, either in one post here or start a new thread sharing the experience...im interested haha

Nate · 07-08-2009, 11:12 PM

OK, since 00ClubDs is asking about the RPM of a D-380 this would not be OT.

I was racing my neighbors Nissan, nothing special but I did beat him. Since I was racing I didn’t watch my speed and realized my PQ D-380 was turning over 8800 RPM. It held together so I was impressed with the "test" and reported the results back to PQ.

It was a test, that's my story and I am sticking to it!

BlackHornet · 07-08-2009, 11:18 PM

well do you know the roundabout speed you were moving?

dirtysouth · 07-08-2009, 11:22 PM

Quote:

Originally Posted by BlackHornet

well do you know the roundabout speed you were moving?

Between 10 and 100mph.

calllen9 · 07-08-2009, 11:23 PM

WEVE RUN 72VOLTS AND THAN SOME ON A D-380 BEFORE

calllen9 · 07-08-2009, 11:25 PM

Nate, Are You Ready For The Bonanza?

00ClubDs · 07-09-2009, 12:31 AM

Thanks Nate and Calllen9, were you guys running stock rear gears? Also what kind of speeds were you both able to achieve @ 72V and 120V respectively? Finally how does Plum Quick modify the motors, do they just rebuild them with heavier/more reliable internal components and balance them? Sorry I know nothing about the electric DC motors, all I know is I'm getting tired of my 48v going just 25mph... looking for 35-40mph. Don't want something full-on racing because this cart is my transportation.

Nate · 07-09-2009, 09:15 PM

120V with 8:1 gears and 20" tires got 55 MPH and got there quickly. Not quick by calllen9's book but enough to scare the average golf cart enthusiast.
120V with 12.44:1 gears and 27" tires got 52 MPH with the front wheels off the ground at launch, another hair-raiser for the novice.
Both carts were limited by motor RPM as I had more pedal on both but the motors were already up in R's. More gear would have definitely helped like maybe a 6:1 with 22" tires.

Calllen9, I will be there but of no competition to you this year. The best I can pull off is helping with a friend in the 72V class.

07-08-2009, 04:08 PM	#1
00ClubDs Not Yet Wild Join Date: Jul 2009 Location: Georgia Posts: 7	64 volts on a bad boy? Now I know it has been stated that high torque motors are the way to go with higher voltage, but how many rpms can you get away with on a high speed motor? Would 64 volts be too much? I have calculated that a D-380 would spin 7600rpm @ 64 volts, but would that burn it up or blow it to pieces?

07-08-2009, 09:51 PM	#2
Nate Gone Wild Join Date: Dec 2006 Posts: 679	Re: 64 volts on a bad boy? D-380 motors are good 8000 RPM from PQ because they test them. It should be OK on a stock motor as well to 8000 RPM but be careful. If you go down a hill your 64V could over-speed the motor, 64V is right on the edge. User must be aware of what is going on. I ran 120V on a PQ D-380 with out issue but watched the RPMs closely... except for that one time I was racing a car
Nate Gone Wild Join Date: Dec 2006 Posts: 679

07-08-2009, 10:46 PM	#3
BlackHornet Gone Wild Join Date: Oct 2008 Location: Austin/Willis, Texas Posts: 627	Re: 64 volts on a bad boy? sorry to derail but...please share this story nate, either in one post here or start a new thread sharing the experience...im interested haha

07-08-2009, 11:12 PM	#4
Nate Gone Wild Join Date: Dec 2006 Posts: 679	Re: 64 volts on a bad boy? OK, since 00ClubDs is asking about the RPM of a D-380 this would not be OT. I was racing my neighbors Nissan, nothing special but I did beat him. Since I was racing I didn’t watch my speed and realized my PQ D-380 was turning over 8800 RPM. It held together so I was impressed with the "test" and reported the results back to PQ. It was a test, that's my story and I am sticking to it!
Nate Gone Wild Join Date: Dec 2006 Posts: 679

07-08-2009, 11:18 PM	#5
BlackHornet Gone Wild Join Date: Oct 2008 Location: Austin/Willis, Texas Posts: 627	Re: 64 volts on a bad boy? well do you know the roundabout speed you were moving?

Today
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07-08-2009, 11:23 PM	#7
calllen9 IT COST LESS TO PAY MORE Join Date: Oct 2007 Posts: 494	Re: 64 volts on a bad boy? WEVE RUN 72VOLTS AND THAN SOME ON A D-380 BEFORE

07-08-2009, 11:25 PM	#8
calllen9 IT COST LESS TO PAY MORE Join Date: Oct 2007 Posts: 494	Re: 64 volts on a bad boy? Nate, Are You Ready For The Bonanza?

07-09-2009, 12:31 AM	#9
00ClubDs Not Yet Wild Join Date: Jul 2009 Location: Georgia Posts: 7	Re: 64 volts on a bad boy? Thanks Nate and Calllen9, were you guys running stock rear gears? Also what kind of speeds were you both able to achieve @ 72V and 120V respectively? Finally how does Plum Quick modify the motors, do they just rebuild them with heavier/more reliable internal components and balance them? Sorry I know nothing about the electric DC motors, all I know is I'm getting tired of my 48v going just 25mph... looking for 35-40mph. Don't want something full-on racing because this cart is my transportation.

07-09-2009, 09:15 PM	#10
Nate Gone Wild Join Date: Dec 2006 Posts: 679	Re: 64 volts on a bad boy? 120V with 8:1 gears and 20" tires got 55 MPH and got there quickly. Not quick by calllen9's book but enough to scare the average golf cart enthusiast. 120V with 12.44:1 gears and 27" tires got 52 MPH with the front wheels off the ground at launch, another hair-raiser for the novice. Both carts were limited by motor RPM as I had more pedal on both but the motors were already up in R's. More gear would have definitely helped like maybe a 6:1 with 22" tires. Calllen9, I will be there but of no competition to you this year. The best I can pull off is helping with a friend in the 72V class.
Nate Gone Wild Join Date: Dec 2006 Posts: 679

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