Monday, August 12, 2013

Mountain Bike Suspension on the E30

The blog has been idle for a few months, but not because of a lack of content. I've spent my free time lately writing short stories in the hopes of getting something published. The following is an excerpt of a concept all to familiar to the automotive enthusiast - too many cars, not enough money.

I got my first mountain bike in 1997. It was a matte black with natural white rubber colored tires. The seven hundred dollar bike was a massive financial commitment for a basement-dwelling college student. Working as a stagehand, I endured days of B-grade country music at a local festival to foot the bill. Within a year I found myself at my first race, the 24 Hours of Donner Pass, high in the Sierra Nevada Mountains. Over the next decade my mountain bike racing ebbed and flowed with school, work, and life.

In the mid-2000's, the 29'er movement swept the mountain biking scene. A 29'er is a bike with twenty-nine inch wheels instead of the twenty-six inch industry standard. It has a taller tire that provides some degree of suspension. This is further aided by tubeless tires, which can be run at lower pressures. Such technology made it possible to have a hard-tail bike (one with no rear shock) that was capable of being fast over rough trails. The job of soaking up the bumps is done largely by the tires, not the shocks. I've since retired from racing, but the tall tire theme remains.

When I bought my 1989 325i (lovingly referred to as the E30) it came with stock fourteen-inch bottle cap wheels and snow tires. These were great for Colorado's winter months, but summer required something that gripped and looked better. I found a set of seventeen inch BBS RGR wheels in four lug fitment and wrapped them with 215/45 sized rubber purchased in a questionable transaction behind a local grocery store. On the stock suspension, the seventeen-inch wheels made the E30 look like a skateboard. Rather than admit that seventeen-inch wheels are just too big for an E30, I lowered it on a very used set of sport shocks and springs.

The contact patch of 215 sized tires on firm shocks allowed the E30 to corner with impunity, but the ride was worse than square wheels on a wooden roller coaster. The gashed, cratered, and comically torn asphalt of Colorado's roads didn't help matters. My daily commute was a few exhilarating turns separated by a litany of trauma. One spleen-rupturing bump at a time, I slowly became a believer in Mike Miller’s logic that large wheels aren't always better. Last fall when a bridge gap transformed the light in my map light mirror into a tooth-chipping projectile, I decided that enough was enough.

The proper solution would be to upgrade my very used shocks with a set of Koni's better suited for a lowered suspension. You really do get what you pay for with shocks, and my experience with Koni-based suspensions has been wonderful. Unfortunately, the recent acquisition of a track car rendered such a solution financially impossible. BBS wheels are generally a precious metal investment as stable as gold, perhaps I could sell them and find a suitable set of smaller replacements. It took a few months, but I ultimately worked out a deal for a set of black fifteen-inch E34 M5 throwing star replicas. Mounted on an E30 some could view such a choice as scandalous, but at least they are period correct and more importantly allow a taller tire.

The track car had also sapped money for tires, but judicious use of a Costco credit card enabled enough reward points for a free set. After months of creative scheming, my spleen would finally arrive to work unbruised. When I kindly strolled into the Tire Center and asked for a set of "205/55 R15's in the highest performing rubber you got" my hopes were shunted. Costco caters to the all-season, big-wheeled, crossover driving masses. The closest thing they had were 195/60 R15 all-season tires. For those unclear on tire sizing conventions, a 195/60 is a taller, narrower tire than a 205/55. The fact that they only had all-seasons prompted me into an unsolicited and rather lengthy lecture on the superiority of dedicated winter and summer tires. My dissertation was received apathetically by the texting soccer moms in the waiting room and with outright distain by the girl behind the counter. With the BBS wheels long gone, no money, and the need to drive to work I was left with no other option. All seasons it would be, and tall ones at that!

Seeing the positive, I rationalized that the E30's ride would be even smoother on taller tires. The new setup definitely made it smoother, but it was ass-backwards. High profile tires and firm shocks, rather than low profile tires and compliant shocks. When pushed hard the flexi sidewalls make my new tires howl like a canine acapella quartet. The ride is just like my 29'er hard-tail mountain bike, smooth over small bumps, harsh over big ones. To ride such a bike at race speed requires a surgical line through the trail, driving the E30 now demands a similar level of precision between craters. My thirty mile commute is now a racecourse of bumps, gaps, gashes, and potholes, all of which I have memorized. Who knew all those years of mountain biking would pay off in my daily commute!

Yesterday in an attempt to avoid school work I gave the E30 a thorough detailing. Both power and hand washings, a full clay bar treatment, and two coats of wax did little hide the scars of 230,000 daily driven miles. As is often a misconception with humans, beauty is not found in perfection. The blemishes and imperfections can be beautiful. The beauty of the E30 lies in everything that it is not. A new, modern car may look perfect, but it is probably bigger, heavier, and littered with driver aids. The E30 is blissfully simple, honestly communicating the road to its driver through exceptional balance and rear wheel drive. It is the original Ultimate Driving Machine. A machine that helped define a brand that has wandered far from its roots. If I could only keep one car, it would be the E30. It's not the fastest or the flashiest, but it's the most fun on the way to work.








Sunday, August 11, 2013

Clouds and Caterpillars

I scored a Sony Nex7 camera on Craigslist recently.  I mainly got it for video, but I've been impressed with the handful of still shots I've taken.  Here are a few examples.  A caterpillar I stumbled on near my front door and the top side of this summer's Monsoon Season.




Friday, May 03, 2013

The Gentleman's Sports Car


I have a theory.  Modern cars suck!  That’s really more of a proclamation than a theory, but it’s rooted in sound logic.  With each new generation, car models become festooned with electronic gadgetry, riddled with driver aids, and (like their American pilots) increasingly bloated in both weight and girth.  This results in bland, boring, and heavy vehicles that from behind the wheel are numb and disconnected. The majority of the car buying population could care less.  According many recent reports, the most important trend driving mainstream new car buyers is technology in the form of infotainment and (mobile) connectivity. There are a few new car models that still seek to satisfy the driving enthusiast minority of the population, but even these are generally softer than their predecessors.  The sad truth is that the automotive future is likely to be filled with four-wheel appliances that stream Pandora much better than they carve a turn.


To be fair, old cars aren’t that great either.  Heat in my old VW bus was provided only the imagination of its unfortunate occupants.  After just a 2-minute reposition of my MG Midget from one side of the driveway to the other I emerge saturated from a marination of gasoline, gear oil, and 40-year-old patoulli.  Carburetors, condensers, points, drum brakes, manual chokes, and non-synchromesh gearboxes are all delightful bits of nostalgia on a Sunday drive, but debilitatingly frustrating in day to day operation.  There must be some compromise between these extremes, no?  There is.  It’s called the 1990’s.

I believe there is a bell curve of automotive design and technology that peaked in the 1990’s making cars from that era superior in almost every way.  They are modern enough to be tolerable in the day-to-day environment yet lightweight enough for even non-sports car models satisfy the driving enthusiast in all of us.  Reliability peaked in this period too.  Automotive technological evolution was in a sweet spot between efficiency advancements and over-complication.  It’s commonplace for an early ‘90’s properly maintained Toyota, Honda, or even certain domestic marquees to have over 200, 300, or even 400 thousand miles on the clock.  A comparable vehicle of today, dependent and laden with globally sourced electronic sensors, will certainly not reach similar a lifespan.  The advent of minimalist manufacturer-paid maintenance has done nothing to help longevity either.  It’s almost as though vehicle obsolescence in early six-digit mileage has been planned in modern cars.

The bell curve of 1990’s greatness begins its rise in the mid-1980’s as the development of fuel injection had matured and trickled down to almost all models.  Disc brakes, early air bags, power accessories, and ergonomics followed suit.  The second gen BMW 3 Series (the E30) is the quintessential example of this.  It’s nearly a subcompact by today’s standards, but its small dimensions, lightweight, and proper balance make it one of the most enjoyable driver’s cars of all time.  As the 1990’s progressed, the models only got better.  Take the 1991-1995 Honda Civic hatchback.  Some models got over 50 mpg, all will swallow four adults in relative comfort, and even the stripper CX provided the driver with a sporty nimble driving experience.  Many are still in operation today with well over 400,000 miles logged.

The bell curve starts to decline in the late 1990’s into the early 2000’s when size and technology became counterproductive to both driving dynamics and reliability.  By the mid 2000’s model creep had re-defined the size of entire model segments.  Small but capable trucks like the venerable Toyota Tacoma had virtually disappeared.  Even the pint-sized Mazda Miata had morphed into a portly little roadster.  Comparing the early and later models, the latter looks like a fat little sister.  Technology like undefeatable stability control systems appeared and failure-prone electric sensors replaced even elegantly simple devices like the oil dipstick.  When is the last time you heard of a dipstick failing?  I foresee a future where even mundane vehicles of the ‘90’s are highly valued only because of their reliability and efficiency.  The Honda Civic VX hatch has already cemented this trend.  An unmolested example will fetch upwards of twice its blue book value.

A few models rise to a status far above the already formidable bar of 1990’s greatness.  The last generation 92-95 Mazda RX7 and every single Acura NSX ever built comes to mind.  A more affordable example is the 1995-1999 (E36) BMW M3.  The E36 M3 is so good that almost two decades after its introduction it is still the track weapon of choice for many of Colorado’s most skilled drivers.  The E36 M3 doesn’t have the charisma and racing heritage of the E30 M3 that preceded it or the baller looks and comforts of its E46 M3 successor, but it reigns as one of the ‘90’s bests and therefore bests of all time.  As the price of the fifty thousand dollar sports sedan plummeted within the reach of teenage drivers and entry-level purchasers, shoddy body kits, shameful abuse, and neglectful disrepair have decimated the E36 M3 population.  Finding a good one is not an easy task.  Even then, the good ones suffer from the required maintenance that a performance BMW demands. 

A discriminating buyer is rewarded with 240 horsepower delivered in the smooth, linear fashion that only a naturally balanced inline 6-cylinder engine produces.  That power is delivered only to the rear wheels through a proper manual gearbox and mechanical limited slip differential, both rapidly disappearing pieces of automotive hardware.   The driver’s softer side is comforted by such cutting edge ’90’s luxuries as leather heated seats, power locks and windows, premium sound, an onboard computer, a ski pass-through, and dual climate control zones.  If properly maintained, an E36 M3 will easily last upwards of the 300,000-mile mark including copious track abuse.  Put all this together and the result is a gentlemen’s sports car. It’s not too flash, not too fast, but perfectly balanced and incredibly capable in the right hands. 

Last fall a gentleman name Jeff came calling.  He looking for a car that was cheap, fun to drive, and got better gas mileage than his truck.  There was only one option.  We found a Cosmos Black 1998 M3 sedan with 186,000 miles on the clock for $5400.  In sedan form the E36 M3 is both more practical and has better proportions than the coupe.  Sedans also seem to be less molested than coupes by the teenage set.  Jeff’s car was being sold by an educated owner, had high quality cooling and suspension upgrades, and was in overall great shape for the mileage.  Like any high mileage BMW it had a few issues.  After all the pressing issues were corrected we were out the door for a few bloody-knuckled afternoons and bill of just over eight grand.  Here’s a brief look at the car and what needed to be done to properly correct its issues. 


1998 BMW E36 M3 Sedan
186,000 miles
Cosmos Black Metallic, Dove Grey Interior
Stock Except for Bimmerworld Aluminum Radiator, Hoses, Steward Water Pump, KW ST Coilover Suspension












Technical Data E36 M3 Coupe vs Sedan


Corrections, Costs, Repairs





Bad Rear Trailing Arm Bushings


Upgraded Cooling System


Power Steering Repairs



Front Control Arm Replacement




Driver's Seat Bolster Repair




The Finished Product

Monday, April 22, 2013

Summit Point Kart 500, Fall 2012

Kart racing has been an integral part of my training and progression into sports car racing.  There is no better bang for the buck than racing karts.  Even more so, there is no better means of gaining seat time in an intense racing environment than at the Summit Point Kart endurance races.  500 miles of racing split between 3 drivers gives a driver 3 to 4 hours of seat time.  That seat time includes car control, maintaining situational awareness, passing, defending, being fast off-line, protecting your line, and avoiding the inevitable crashes that result in any racing environment.  To the uneducated observer it just looks like a bunch of adults noodling around in toys, but after karting for almost 3 years now I can testify that it some of the most intense racing around!

We did our first SPK 500 in the fall of 2011.  You can see details of the race, karts, and course at


For 2012 it would be Andrew, Casey, and me.  The course was a little different than 2012.  It was run in the opposite direction from normal.  There was also a chicane in the back straight and changes to several turns.   It was a great course compared to the previous year.  The back straight was slower with the chicane, but the course felt faster and more technical.  Our team started out slow, but after a low point mid-race where I had two bad karts in a row we clawed our way back up to 11th.  Andrew set the second fastest RX7 lap of the race after the top 5 teams upgraded to RX250.  Our next race is the 24 hour - that's right 24 hours! - enduro in June.

Plotting the Best Line


Old Glory on My "Racing" Flight Suit


The McCulloch Boys Doing a Pre-Race Radio Check


Qualifying


Thumbs Up Before the Start


1st Stint




The "Tin Man" Walk After a Driving Stint


Andrew Radioing Lap Times, Casey in the Background


The Red Line

Spins were so common at the exit of turn 15 that this red line was painted.  Any kart that crossed it was immediately black flagged and required to hot pit.  The fastest line was as close as possible without crossing it.  This shot was taken after I had already started cutting across the track for turn 16.  I tried to get within an inch and was only black flagged for crossing it once throughout the race.


Andrew Hurting After a Driving Stint


Random Guy Getting Down on a Banana
Photo is the work of Yenns.


Andrew Monitoring from the Pit Wall


Andrew Finishing the Race


Team Shot - The Green Stigs



Porsche Race Cars on the Main Circuit

As we were leaving Summit Point we were treated with a few Porsche Boxter racecars doing night laps on the main circuit.  They were there with a Porsche Club event.  These were not normal boxters, but fully prepped race cars.  It was an excellent sight and sound to witness.