Saturday, July 11, 2015

Competition

The worst thing in racing is to be the only person racing. Without competition, it's just not much fun to win. This year, I don't lack for competition. Practically everyone in the class (who has showed up for more than one day) has a season championship. I'm pretty much the only one without a local jacket, and just recently, Johnathan Leith (Leafy) made me the only regular driver in the class to not have a trophy at a national event outside NER. (Congratulations to him!!). There's a danger that come September he'll also make me the only regular competitor to not have a trophy at nationals.

I have a wealth of good competitors this year which is excellent. So far this season, I've been pretty lazy about updates here and I finally took some time to update my standings page. Not surprisingly, with the improved competition, my results are not as good at this point in the year as last year. That said, my times simply haven't been as good as last year either. I ended my streak of hot season starts, and this time I had pretty crappy days for my first few events.

Things are beginning to look up however, I fell short at our national tour, but I was in the hunt until the middle run of the second day, and in fun runs at the last Renegade Miata event I posted my first ever FTD (fastest time of the day). There is one really fast person (Grant Reeve) who didn't show up to that normally does, but I've had that opportunity at least half a dozen times in the last few years and not been able to take advantage. Next goal is to do it when Grant is there, and BEFORE fun runs :).

The other likely significant thing about the last event was that it was the 3rd weekend in a row, and 4th day Autocrossing in 14 day span. Seat time helps! So tomorrow, I'll be at the Evolution Performance Driving school challenge school to work on the seat time and get feedback from their excellent instructors. Lets hope that helps me take it up a notch. With this crowd I'll need it!


Wednesday, June 10, 2015

Like LSD man...

Ok sorry for the goofy title, I couldn't resist. So after doing all the work of pulling out the transmission, it became very clear that I want to minimize the number of times I do this. It's sort of fun in a way, but it really does take a lot of time and effort. So besides replacing the tattered, clutch that was probably a hairs breadth from grendading like this one:


The flywheel, and the Limited Slip Differential (LSD) were also installed. Basically, as a consultant, my time can be converted to money fairly readily and long term it's cheaper to do it all at once.

The flywheel is the Fidanza Aluminum flywheel, which shaves 6.8lbs off (about 45%) the stock. The clutch plate itself is only an ounce or two lighter, but it has less mass near the edges, and the clutch plate cover and pressure plate is a pound less, so the total weight savings should be about 8lbs of rotational weight. 

The LSD will offset that somewhat, adding back a couple pounds or so, but the diameter of the added rotational parts will be small, so perhaps 5-6 lbs off the car, and even more reduction in rotational inertia. PLUS power will now be available in the corners!

Only one problem... with great power comes great responsibility. It turns out that a lot of the time I've not been very gentle with the throttle. The LSD exposes this flaw in my driving in 2 ways. First, if lateral grip is not at maximum, but the car is turning, when the LSD locks up, this results in power only on the outside wheel (since the axel has become solid the inside wheel with less weight and traveling a different radius must slip). That tends to torque steer the car into the turn. This is potentially useful, but also throws you off if you are not used to it. Second, if you are at the limit of lateral grip, adding power now causes the OUTSIDE rear wheel to slip... and that will tend to make the car want to spin.

So while the LSD unlocks a new level of potential speed, the open diff will tend to save you from yourself, and is slightly easier to drive. My first event on the new LSD was quite disappointing because I was discovering that my throttle work needed work. After about 5 events, now I'm getting used to it and learning to ease onto the throttle and not be on/off the throttle as violently, and may just be beginning to reap the benefits of the additional speed in the corners.

Other notes on the changes I made... the lighter flywheel seems to make it slightly harder to get the car to actually turn over, which puts my present battery solution right on the very hairy edge... I probably need to think about setting up a cold weather jump system to ease the wear and tear on my starter when I have to leave for a race in the early AM. Mostly I just need an easy way to get jumper pack clamps on the battery.... without risking a short. The present space is pretty tight.

Monday, March 16, 2015

Waiting for the thaw...

Such a winter... 3-4 ft snow in the yard at max. Many all time snowfall records broken, season record in jeopardy. Even more amazing, it went from almost zero to nearly a season record in under a month. Not much was happening in early winter, so I didn't bother trying to manufacture a post. Then later, I was preoccupied with climbing on my roof to hack off the ice that was almost a foot thick in places...

With winter wrapping up and warm weather on the horizon, of course the car is somewhat disassembled... So I don't have time to write anything interesting now either, but I can offer you some pictures of lotus guts...






So obviously, the clutch is getting replaced.... other mods TBD, time/$ permitting...

Monday, October 6, 2014

0.051 seconds

Last Sunday was the season finale event for the New England Region of the SCCA. This event is essentially 3 events in one. In the morning, we get 3 runs, these 3 runs count as the 9th and final event of the year. This decides the class championships for the year. The champions and the top 10 in season PAX then get to compete for the Stirling Moss championship.  The winner of the Stirling Moss championship gets the their name engraved on the 1959 Nürburgring trophy that Sir Stirling Moss donated to the New England Region chapter. Making it onto that trophy is the top honor in the region, and a sort of local racing immortality. The New England Region is very lucky to have this way of honoring it's top drivers. Those who don't qualify get to participate in the other afternoon event a 3 run non-points fun event.

For the second year in a row, I started the finale with a theoretical chance at getting my name on the trophy. Last year I was slower than my nearest competitor, Jonathan Leith (aka. Leafy), but had ridden a wave of points from early in the season before his car was fully working. I lost, and in many ways, it is a good thing I did. Had I won, I might well have become complacent.

This year I got off to an abysmal start, loosing 3 out of the first 4 events.  Much like the end of last year, Leafy was driving faster than me. This year it was me staging the comeback. I worked hard on my driving, focusing on seat time and attending the Evo School in July. I beat Leafy in events 5 and 6, lost by 0.330 in event 7 and won event 8. This is about 1000 times more fun than riding a lead gained by virtue of your competitor not having a working car.

Unfortunately, my early season win, and the win in event 5 had come on days when national champion or soon-to-be national champion drivers had entered the class, and so I did not get first place on those days. Although our head to head record was tied Leafy had a points lead of 4 points, and the ability to win tie breaks by virtue of more first place finishes. I needed to gain 5 points, which can only happen with me in first, and him in 3rd or less, or me in 2nd and him in 5th or less. As the event neared, only Leafy and myself were signed up. A 2 driver class would leave me with no chance of winning at all.

With that in mind, I invited Ryan Field to drive in my car, so that there would be at least one other driver with a decent chance of beating Leafy. Ryan is actually a faster driver than I am by a good margin, so beating him was pretty unlikely, but a small chance is better than no chance. Soon after Ryan registered, Derick Sivret, also a very fast driver registered in Leafy's car.  This would be a sensible points move by Leafy, now I have to beat 2 top flight drivers to win.

As a concequence, I entered the finale again with a faint hope of winning. The points situation was just too far against me. The season had been virtually lost early on and I was proud to have made it this close to begin with. My main reasonable goal was to beat Leafy, and at least be able to say I won 5/9 events vs him.

My first run was a flop. I didn't take quite the right line, and then spun when I tried to correct with a quick tap of the brake, but I got underway quickly and worked the rest of the course as a practice run. I wasn't worried, because I knew exactly how to fix what I did wrong. I didn't really pay attention to the other drivers, and on my second run I laid down a nice 50.649. Now that I had a real time I checked the other drivers times, I found that Ryan had coned every run, and I heard by word of mouth that Derek had only one clear run that was a 50.4xx, Leafy had no raw times better than 51 seconds!   I was in 3rd, and only needed to gain around 2 tenths to win first place and the season trophy. It was the dream scenario! Holy crap.

Driving up to the line for the final run I recalled last year when I was trying to make up almost 3 seconds to beat Derek in a similar points situation. 3 seconds was hopeless, I drove hard but lost it near the end of the run. I knew I had to NOT over-drive this run and spin. That would be a horrible way to finish. But I also had to go faster. I was really nervous. Choking and going really slow would suck too. So I took a deep breath, and focused on getting the cameras working. At the line I decided to focus on improving my line near the tower to improve my entry to the taxiway. That should get me the 1/4 second or so I needed if I just ran the rest like I did before.

I improved my line and got a much nicer entry to the taxiway as planned. The taxiway and the first half of the runway went well, much as they had on the previous runs. All I had left was the big cut back across the taxiway and then the offsets to the finish. Perhaps it was because I saw so many novices screw up the cutback in the morning, and perhaps it was because some part of me recalled the end of the race in the previous season where I almost spun on the last bit turn. For whatever reason, I over broke just a little for the cutback. But this sort of mistake is not a tragedy. It's much, much better than braking too late and I belayed the excess traction conferred by the slower speed into a good exit from the element and made a great run to the finish where I hit the rev limiter. To the best of my knowledge it was a clean run...

The time...

50.457

Wow! It was CLOSE! When I got back to the paddock it was a dive for the phones, to check sololive.ner.org. And the result...

Derek's time turned out to be....

50.406

I was 0.051 seconds short of winning the season championship and gaining entry to the Moss competition.

0.051 seconds... less than the blink of an eye...

Yet I was not unhappy. Here I was, nearly surviving the onslaught of two very fast drivers, and beating Leafy a second in both of the last 2 events. It's true, I don't get the jacket that says class winner on it, but a jacket is just a jacket. 0.051 sec is a tiny differential, and that's all that stands between me and being a class champion. My driving has improved drastically this year. Basically I'm there... the difference is tiny.

Next season should be very interesting... Hopefully both Leafy and I will up our game, and some of the national champions who visit the class will start coming up short.

And finally, congratulations to Dave White who won the Sterling Moss Trophy this year. Dave is a National Champion in Street Modified, and one of our fastest drivers. Now he has his slice of local immortality too. Here's a picture of him holding up the trophy...