What Mods?

[DavidDymaxion]

Randy of Canadian EV modded it. It is supposed to have been rewound with higher temperature wire, has armature banding, better brushes, and better bearings.

Originally Posted by gottdi

What Mods?

Can't imagine higher temp wire. The wire is fat and flat for all field windings. Maybe higher temp coating. Can't imagine much better than H rating. Which they are.

I can see comm banding and better bearings. I know about the winding wire. Damn thick and heavy. I'd bet that that stuff could handle loads of amps.

[DavidDymaxion]

My motor is a sepex, so the field windings are with fairly fine wire (unlike a series motor). I presume the fields got the better wire.

Originally Posted by gottdi

Can't imagine higher temp wire. The wire is fat and flat for all field windings. Maybe higher temp coating. Can't imagine much better than H rating. Which they are.

I can see comm banding and better bearings. I know about the winding wire. Damn thick and heavy. I'd bet that that stuff could handle loads of amps.

[toddshotrods]

Originally Posted by Kelmark

I know Plazmaboy's White Zombie blew one up while pushing the upper limits of the motor RPM. Then they switched to the dual netgain motors.

Play nice, IIRC, he actually blew the motor doing the longest EV burnout in history. When he first changed from the single 11, to the twin 8s, there wasn't any significant difference in performance. He eventually developed the dual motors to provide better performance. In defense of single motors, Smoke Screen eventually surpassed his performance with a single 13" GE motor. I'm not saying either is better just throwing some facts out for consideration. I wonder what that 11", or maybe an 11" Warp, would have been capable of with the same development effort and time.

I was unaware that yours was a sepex Kostov. I can see better field windings for higher amperage there. What kind of controller are you using with your sepex?

Pete

Originally Posted by DavidDymaxion

My motor is a sepex, so the field windings are with fairly fine wire (unlike a series motor). I presume the fields got the better wire.

I took a look at your web site. I looked at your run at the salt flats too. You mentioned that you were running 48 volts to the motor. Both field and armature. How are you controlling the amperage to the field? You mentioned that the motor was hot at the end of the run and it looks like you have a cooling fan on it too. I think your running way to much amperage through the field compared to to the armature. I think that is where your getting your heat. No need to over volt/amp the field.

What controller are you using?

Pete

Got some good photos of your comm on your motor? I'd like to see the modification. Got some good photos of your motor and controller setup?

[toddshotrods]

Originally Posted by toddshotrods

Play nice, IIRC, he actually blew the motor doing the longest EV burnout in history...

Oops, he did blow the Kostov in a race. Had my facts screwed up...

Originally Posted by toddshotrods

...When he first changed from the single 11, to the twin 8s, there wasn't any significant difference in performance. He eventually developed the dual motors to provide better performance...

I had that part right. He was in the mid-13s with the Kostov, and bounced around between tehre and 14s when he first went to the siamese s, but eventually started flying.

He did say that he would have still been developing the single 11, if it hadn't zorched.

[Bowser330]

Originally Posted by toddshotrods

Oops, he did blow the Kostov in a race. Had my facts screwed up....

No you didn't, you were right the first time...I distinctly remember a story (that has now been changed in the White Zombie History page), about doing an attempted burn-out and breaking the motor that way...hmmmm...something shady going on...

*Edit*

I found an old post where it was discussed before...way back in Dec.2008....Proof I am not crazy....

Originally Posted by DavidDymaxion
Those are some awesome numbers!

John actually didn't burn up his motor doing a burnout... He was trying to do a burnout but the wheels bit and didn't spin... But it did skid the front wheels. He estimates this went on for 30 to 40 seconds. This is the almost the worst treatment you can give a motor, it was turning very slowly whilst being fed 1200+ Amps! The only thing worse would have been locked rotor.

[toddshotrods]

Originally Posted by Bowser330

No you didn't, you were right the first time...

I thought so! Man, that was really bugging me because I was so sure I had read that before! I am also sure I saw something on Jim's site about a new siamese 9" for the Zombie, with a reference to his old siamese 8s, that doesn't seem to be there anymore.

Interesting. Thanks for helping me preserve the tiny bit of sanity I have!