Well it was quite a weekend at Laguna Seca. The third annual ReFuel event was held on Sunday, June 26 at Laguna Seca Raceway. Admission was a mere $10 (that's basically free track time at Laguna Seca). I started my drive from Fresno Saturday mid-morning and stopped for about 5 hours at the KOA campsite off Highway 152 in Santa Nella at the base of the San Luis Resevoir (where is my 6.6KW charger Nissan?). I took mostly country roads to get to Los Banos (Avenue 7, Road 33 etc). My destination for the night was Aptos, CA. After eating at the nearby Petro, making a few phone calls and catching up on some blog reading I left for Aptos with a full charge drafting a semi-truck up 152 at about 55mph. Made it to Aptos about 7pm with 3 bars to spare. Got a full charge that night. At 6AM I headed out for the 40 mile trip to Seaside where I topped up at Cardinale Nissan (thanks guys!) for about an hour. When I arrived I saw another Leaf charging. That was Mike Newell (aka Fiestatrio) who was in from Santa Rosa. After a brief intro we headed out to the track. Registration was quick and easy and helmet and transponder rentals were available for a nominal fee. We plugged in immediately to the available 50 amp RV outlets and had full L2 charging with the 16 amp Ingineer EVSE's (sweet) all day. After a brief driver orientation and tech inspection we headed out for our first of two practice sessions. The goal of the day was to achieve your best time during the Time Trial Event. I started session one with 10 bars and drove in ECO mode for max regen. Brakes performed well and were very predictable. The tires and suspension were clearly the weak link. Best time that session was a 2:13 (3 laps total for session one). In session two I had a brave ride-along so my time stayed about the same. At the end of the 6 lap session the tires were getting hot and starting to get a little unpredictable. The brakes were starting to get hot too. With only 1.5 hours between sessions and the longer run time of the 2nd session I ended up with 2 bars SOC at the end of session two. The time trial started about 3:30pm so that only left me with 2 hours of quality charging time. No matter though since the time trial was only 2 laps. We also started at turn 10 (near the end of the track) to minimize power consumption. I clocked my fastest time of the day with a 2:10 lap. Tires were definitely angry. After the TT event I came back to the paddock and decided to skip the last open session of the day in order to maximize range for the trip home. It gave me a chance to watch the other EV's rip around the track.
The Leaf drivetrain and battery BMS are solid. To my surprise almost every other EV out there (production or otherwise) had heat management issues after 2-5 laps. Tesla's were hitting power cut by lap 4-5. Most of the other kit cars could do one or two laps due to heat or range issues. Conversely, the Leaf was pulling strong all day and the battery temp gauge didn't move over 6 bars. Energy efficiency on the track was a stellar 1.2-1.3 m/kWh. Ha!
Hopefully some aftermarket suspension companies are reading this and will consider designing some parts for the Leaf. While it lacks the power necessary for big tracks like Laguna Seca I think it would be great fun at autocross events. With the weight slung low I think it has some great potential. Hopefully at next years event I'll have some new suspension and stickier tires to test out. With any luck I think shaving 5-10 seconds off (or more) is doable.
Pit Photos: http://www.naderassemi.com/photography/refuel-2011-laguna-seca-pits/
Track Photos: http://www.naderassemi.com/photography/refuel-2011-laguna-seca-track/
Video:
[youtube]http://www.youtube.com/watch?v=IcVx4BoNzEM[/youtube]
In Car Video (Having some fun on the warm up session):
http://vimeo.com/25694725
Media Coverage: http://www.examiner.com/green-trans...for-3rd-year-of-electric-racing#ixzz1QWBQHF1i
It's a long article covering the entire event but here is the best part IMO:
The Leaf drivetrain and battery BMS are solid. To my surprise almost every other EV out there (production or otherwise) had heat management issues after 2-5 laps. Tesla's were hitting power cut by lap 4-5. Most of the other kit cars could do one or two laps due to heat or range issues. Conversely, the Leaf was pulling strong all day and the battery temp gauge didn't move over 6 bars. Energy efficiency on the track was a stellar 1.2-1.3 m/kWh. Ha!
Hopefully some aftermarket suspension companies are reading this and will consider designing some parts for the Leaf. While it lacks the power necessary for big tracks like Laguna Seca I think it would be great fun at autocross events. With the weight slung low I think it has some great potential. Hopefully at next years event I'll have some new suspension and stickier tires to test out. With any luck I think shaving 5-10 seconds off (or more) is doable.
Pit Photos: http://www.naderassemi.com/photography/refuel-2011-laguna-seca-pits/
Track Photos: http://www.naderassemi.com/photography/refuel-2011-laguna-seca-track/
Video:
[youtube]http://www.youtube.com/watch?v=IcVx4BoNzEM[/youtube]
In Car Video (Having some fun on the warm up session):
http://vimeo.com/25694725
Media Coverage: http://www.examiner.com/green-trans...for-3rd-year-of-electric-racing#ixzz1QWBQHF1i
It's a long article covering the entire event but here is the best part IMO:
Where the production car class (Mini-E, Leaf and Tesla Roadster) becomes interesting is the results achieved by the Mini-E and Leaf owners. Unsurprisingly, they were beaten by the Tesla Roadster drivers, but beaten by less than one would imagine. The slowest Tesla Roadster had a best lap time of 2:08.007, the Mini-E (driven by J Dow) had a best lap time of 2:08.779, and the Leaf (driven by Nader Assemi) had a best lap time of 2:10.223.