Post by Keith Tanaka on Jun 25, 2014 16:09:52 GMT -8
Prior to the start of the 4 hour enduro I thought that we would need to make a motor change and replace the rear tires at least once during the race. After the race ended, it was a big surprise (to me) that everyone ran the entire enduro with one motor and most if not all used only one set of tires.
Today, I checked the two cars I built/raced for the race (one was raced by team #4 "Survivors") and I was very surprised by what I found.
Team "Senior Discount" car: motor: TSR D3, one motor brush nearly 100% worn, other brush 75% worn. Geared 11/54 rear tires: almost no measurable wear (hard to believe?). Rear clearance still passes tech (.050" min.).
Team #4 "Survivors" car: motor: Falcon 7, one motor brush nearly 100% worn, other brush 70% worn. Geared 10/49 rear tires: almost no measurable wear (again hard to believe?). Rear clearance still passes tech.
Did anyone else notice the motor and tire wear of their enduro car?
Tire wear question. Why was the tire wear negligible? Do the conditions of an enduro extend the life of the tires versus a regular monthly race condition? If so, how?
Post by bob krigbaum on Jun 25, 2014 22:35:20 GMT -8
Keith, Sloth Racing had to change tires during the 11th heat but the second pair lasted until the end. The car finished with only .030 rear clearance. We were geared 10/52 and our motor still has at least 25% brush left on both sides of the TSR. We may have been the only team that had to change tires. Perhaps my chassis was harder on tires, our car was loose the entire race. I set it up that way expecting the car to tighten up as the race went along but it never did. I'm still amazed with the motors, we had two extras ready to go and I fully expected to have to use them both. I spoke to Tim Neja afterwards and they had the same motor plan I had, I think everyone was surprised with their longevity. We did have gear wear, our aluminum spur is almost completely shot.
Team Rolling Hill's motor still had a substantial amount of brush wear to go. I don't know what thickness they start at but I would guess that they would have lasted two more hours. We were the lightest at 167gm and geared 11/56. We were running a heat sink also. We ended up with about .040 clearance at the end, so tire wear was not bad, mostly on the right side. We were ready for motor, tire and braid changes, but did not need them. I just put the Slick 7 composite gear on another car, it is just broken in.
I miked the brushes, one was .087 and the other was .092. I don't know the starting measurement. Further disassembly shows .005 wear on the commutator.
Ron, I believe everyone was running the treated Pro Track's. The "N" natural tires have too much grip for heavy cars and wear out faster. A look at the tech sheets on the race report would verify this.
I was wrong, three of the cars were running N tires and five treated tires.
Our brush wear was very similar to what Keith experienced in the Bowtie car. But tire wear was going to be a problem if we ran much longer. I'd estimate we were down to .020 clearance at the end!! I think it was the Pro Track treated tires we ran--and our car was just a little "loose"--but it made it easy to drive for those long stints!!
WOW----maybe we need to go to a 5 hour enduro---to ensure a motor change and tire change!! That would be interesting to see how quickly people can get motors in and out of these babies and change tires. Probably one pit stop and do both at the same time would be the best!! I'd just plan on changing around the 3.5 hour mark--that way a team could probably get away with one stop if there are no other problems!!
Team Rolling Hills' car had another 2-3 hours left with no tire or motor issues. It also was built with fast motor changes in mind, one tire set screw, two motor screws and put the braid back in. Just a tire change could have been done without pulling the body.
Welcome to Shoutbox. Post your viewpoints here, but keep your posts civil.
Keith Tanaka: The mid-engine Lotus Europa will be allowed to race in the Foreign Production Sports (hardtop) class. The D3 Hardbody rules have been updated to include this revision (see post above).
Jul 11, 2020 13:29:18 GMT -8
Keith Tanaka: Not sure yet when we can return to our racing. In the meantime, just saw a very interesting interview with Jim Hall talking about his Chaparral car designs (see post above for video clip).
Jun 3, 2020 15:51:02 GMT -8
Keith Tanaka: Just heard the sad news today. Jay Henry passed away. He battled cancer although he didn't want others to know of his health condition in the last year or so. We'll miss his enthusiasm for our hobby. RIP Jay.
Apr 16, 2020 16:24:25 GMT -8
Keith Tanaka: Unable to race slot cars because of the Coronavirus outbreak, here's some interesting interviews with some Legends of our hobby talking about the Golden Era of Slot Car Racing (see above).
Apr 3, 2020 10:25:55 GMT -8
Eddie: Greetings to my Hardbody Racing friends. I hope all of you are doing well, and that we'll be racing again sooner rather than later!
Apr 1, 2020 10:20:15 GMT -8
Keith Tanaka: The Trans Am Enduro is postponed. We'll reschedule the enduro when authorities deem its safe to conduct group activities.
Mar 27, 2020 19:35:56 GMT -8
Keith Tanaka: Racer Handicap and Lap Differential charts updated to include races on 3-15-2020 (see above).
Mar 20, 2020 19:46:16 GMT -8
Keith Tanaka: The D3 Hardbody race for March 29th has been cancelled due to the Coronavirus situation. The Trans Am enduro has NOT been postponed at this time, but any change in schedule will depend on the virus situation in the coming weeks.
Mar 17, 2020 12:31:40 GMT -8
Keith Tanaka: Sunday's hardbody race report has been posted at our Smugmug website (see link above).
Mar 16, 2020 18:06:14 GMT -8
Keith Tanaka: Yesterday's D3 Hardbody races at BPR had a lite turnout of racers probably affected by the Coronavirus. Gonzo raised the bar again by exceeding the GTP total lap record of 266 with 268 laps (nearly 269 laps!). Race report to be posted later today.
Mar 16, 2020 10:18:53 GMT -8
Keith Tanaka: Team HiTech will be in the enduro. We now have 8 teams for the enduro.
Feb 28, 2020 11:14:20 GMT -8
Keith Tanaka: The enduro has 7 teams participating so far. Waiting for Team Hitech and Slot Car LFR to respond.
Feb 22, 2020 21:04:48 GMT -8
Eddie: Team Autorama is in, we just don't know WHO we are. Yet. :-)
Feb 16, 2020 9:05:30 GMT -8
Keith Tanaka: Team signups for the Trans Am Enduro in April have begun (see above). Who's going to race?
Jan 31, 2020 16:41:44 GMT -8
Keith Tanaka: Sunday's D3 Hardbody race report has been posted at our Smugmug website (see above for link to report).
Jan 20, 2020 19:04:25 GMT -8
Keith Tanaka: The D3 Hardbody Racing 2020 calendar arrived recently. For those who ordered one, I'll have the calendars at BPR on Sunday, January 19th (next D3 Hardbody race day).
Jan 8, 2020 11:13:29 GMT -8
Keith Tanaka: Sunday's D3 Hardbody races had another sub 5 sec. lap by Jim Lane (2nd time for Jim). A lot of fast, close racing again with lots of laughs at our last race for 2019. Race report to be posted later today. Happy New Year everyone!
Dec 30, 2019 12:28:59 GMT -8
Keith Tanaka: The Sub 5 Second "Club" chart has been posted (see above). Who will be the next D3 Hardbody racer to join this fast lap club?
Dec 27, 2019 15:37:41 GMT -8
Keith Tanaka: The Racer Handicap chart has been updated to include the races on 12-15-19 (see above).
Dec 27, 2019 14:34:43 GMT -8
Keith Tanaka: Sunday's D3 Hardbody race report has been posted at our Smugmug website (see post above).
Dec 17, 2019 11:11:19 GMT -8