-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
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.
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.
Last edited:
Dave,
I actually wish you had broken my record. I would prefer to have a target to aim for. It helps the competition.
The charging cables were fine, but the generator we had wasn't working well. Even though it was rated 70KW, it couldn't handle more than one car at a time. We also had a time when it was shut down because of fear that it was running out of fuel, then later it was determined that there was a reserve tank and it had plenty of fuel.
Ultimately, the issue for Dave was neither cables or generators but the slow rate of topping off, dropping to only about 12 Amps as the pack got close to full. So it would take a long time to get those last few electrons in, and we found those really do seem to make quite a difference.
Tdave
Member
Video montage of the autocross, including some footage of all the Teslas. Me driving my red Sport is near the end.
Last edited by a moderator:
Tdave
Member
For both of these events, the autocross and the drag race, traction control must be turned off. TC is way too aggressive at limiting power, trying to completely eliminate wheel slip. This is true for drag racing, but especially true in an autocross. I wish there was a TC performance mode that allowed a moderage amount of slip, or when cornering allowing slip on the inside wheel but limiting it on the outside wheel. The TC combined with the open diff means almost no power during and when exiting a turn.
Turn off TC!
Turn off TC!
Tdave
Member
They worked great. I used the 14-50 plug mostly, plugged into an adapter cable supplied by our EV club. When the generator was acting up at the drag strip, the property owner allowed me to unplug their big freezer at the concession stand for a half hour at a time to charge. It was the 3 prong 50A plug, so I'm glad I brought all my RFMC plug options with me.
But James, I want another RFMC plug option for direct generator connections. I want one that has a 50A generator twistlock connector at the end as the plug. That way I won't have to rely on using one of the EV club's adapter cables to provide a 14-50 outlet. It also may come in handy on the road if I run across a generator that's available to tap into. I can give you the exact twistlock type to use. Most of the 60-70 kW trailer generators use the same twistlock outlet.
I concur on the TC. I wanted to compare with and without, so my first couple autocross runs had TC on. My first run with it off I kicked it too hard coming out of a turn and did a donut. After getting a better feel for it I cut at least full second off my time. By the end I was power drifting through the entire S turn that was the last part of the course. That knocked another 1/2 second off my time.
There was one sharp turn that was about 135º and understeer was a problem. I would have liked to have had the adjustable suspension for that one.
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.
There was one sharp turn that was about 135º and understeer was a problem. I would have liked to have had the adjustable suspension for that one.
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.
tomsax
Member
I would expect that my 12.982 second 1/4 mile ET (103.48 mph) can be beat by more than 0.1 second. I had TC on and didn't two-foot the start on my runs that day. Does anyone know the particulars of Don Auker's 12.975 run?
For what it's worth, I think it would be better to sit out a run or two charging at 40A to get your battery pack as warm as possible, which seems to be more important than percent full.
Tdave
Member
Another video of the autocross. This must have been among our first runs, because none of us look very fast (yet).
Last edited by a moderator:
Tdave
Member
Tdave
Member
Another article about the event, though dated today.
D.C. electric car club races electric cars in Md. | Washington Examiner
D.C. electric car club races electric cars in Md. | Washington Examiner
Similar threads
