My winter project is a GTM supercar (kit) electric drag racer. Goal is a 10 second quarter mile. Imagine this showing up at the Zilla Invitational...
Yowza!
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My winter project is a GTM supercar (kit) electric drag racer. Goal is a 10 second quarter mile. Imagine this showing up at the Zilla Invitational...
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Otmar whipped out his handheld computer and patched into the Zillas to check the configurations. They were set at 800A each (tuned down from 2000A each for break in and initial run). Otmar then explained some of the finer points of his controller's settings and made some suggestions on configuration changes.
Get this! The two 2000A Zilla controllers on "Gone Postal" were set up independent from each other. One to handle the front 9" ADC, and one for the dual 9" ADCs in the rear. This way each system can be tested separately, and they have the option of running on just the front, just the dual rears, or both. What we discover from Otmar is that the controllers can talk to each other too. This way when the front transmission is put into reverse, the rear motors are deactivated automatically. Put the front transmission back into a forward gear and the rears come back online. Otmar also set up automatic series/parallel shifting which picks the best points and changes modes when appropriate.
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Rod had a sprocket slide off a shaft and a belt was thrown on the road between the hotel and the strip. He collected the parts and it looks like there was no major damage.
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down about 3/4 of the track, one the rear belts tracked off and caught (but thankfully didn't get damaged). When the belt caught it grabbed the motor momentarily, causing the controllers to go into seize mode, shutting down power to both the rear motors.
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Heartbreak Hotel! Gone Postal at full power was too much for the drive shaft locking keyway. Both shafts twisted, shearing the keys in half and losing all horsepower at the wheels...
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Rod launched out of the hole pulling hard against the Viper. About halfway down the track, SNAP! He snapped one of the herringbone drive belts.
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Man, this is why I really wish I had been able to set a record yesterday. I think it was my only chance. Would have been cool to hold the record, even for a month.
How did the Roadster Foundry MCs work out for you? Did you have 40 amp recharging available at the track?
We probably need a new topic for James' GTM project.
Electric GTM on my mind - FFCobra.com - Factory Five Racing Discussion Forum
Wild GTM - LOTS of pics - FFCobra.com - Factory Five Racing Discussion Forum
James, Otmar can deliver the motor power, but watch out for the drive-line components between the motor and the wheels.
Let's not repeat the Suck Amps Going Postal story.
How did the Roadster Foundry MCs work out for you? Did you have 40 amp recharging available at the track?
To me, the TC not only activated too soon, but the bigger problem was that it didn't recover for a long time, so I would just be getting full power back as I approached the next turn.
One of 2008 owners beat the 2008 model quarter-mile time record, about 12.94 I think. I find that interesting that they could beat the 2008 record at this track on the same day I couldn't break the 2010 Sport model record.
Spectators at the Mason-Dixon Dragway got a rare glimpse of the future as they watched electric cars rev up and silently charge around the Maryland track at speeds of more than 100 miles an hour.
The cars, motorcycles and tricycles were an eye-opener for the baffled visitors, who were more accustomed to seeing the dust, dirt and smells of traditional gas-fueled dragsters.
"Seeing them run for the first time today definitely scared me because their times are kinda close to some of my times," drag racer Travis Beall told the AFP news agency.
"Every year they are getting faster and faster,” he said.
However, the new vehicles are now without their disadvantages. For instance, electric car drivers can't simply pull into a gas station anytime for an electricity refill.