I started with an $1900 1990 Miata with 300,000 miles and hail damage. I think if you want a real track car (roll bar, seats, harness, suspension), that $10k for something like an E36 just isn't realistic. I'm probably jaded, but as someone that's currently swapping the blown engine in his E30 rally car, I have a hard time believing any BMW is an affordable or reliable track toy). Here's my cost breakdown to turn a crap Miata into a track toy. Note that nothing actually added any power here:
$1900 car
$1350 suspension (FM track pack)
$850 on seats
$750 on wheels (I only have one set suitable for track)
$420 on harnesses
$380 on tires
$300 getting harness bar and diagonal welded to roll bar
$280 on brake pads
$250 on steering wheel mount/quick release
$230 on steering wheel
$200 mounting seats
$200 wheel alignment, mounting tires.
$200 on seat back braces
$150 on windshield
$65 on lug nuts.
That's $7525 and values many weekends of my labor as free. The car already came with a roll bar (but didn't have a diagonal, so I added that), and also came with a Mishimoto radiator, and an all-aluminum radiator is pretty much required preventative maintenance for a track toy.
It's done enough track days that I've gone through a set of 200TW tires and a couple sets of NT01s. It's a track car with a license plate. I drive it to the track on track tires, Carbotech XP8 brake pads. Sure, it's a brutal, loud, hot/cold ride and NT01s are scary in the rain, but I love not having to deal with a trailer for track days. It's true that I can't carry anything in it, but I don't need to! I don't even take any tools beyond a tire gauge. I do sit on a piece of foam on the street which makes my 3 hour drive to the track more survivable.
Things that have broken on my 300,000 mile track Miata:
- Wheel bearings. I hilariously decided to see how long likely-300,000 mile wheel bearings would last on track. The answer: they were making terrible noises after one track day. Replaced before the next.
- Heater core started dripping on my feet. It's a track car, so I just bypassed the heater core and went on about my day.
- It was down on power and missed a bit on throttle tip-in at high RPM. Tried to check the timing, but the harmonic damper was toast and the timing marker just randomly rotated around the crank pulley. That was like $150 to replace. Turns out the timing was set around 0 degrees advance. Ran great after I fixed that.
- Rubber air intake cracked. $100 for a new one, though it did run just fine with some RTV over the crack.
To be fair, it's clearly not the original engine as it's long nose crank 1.6, and the car would have come with short nose. No idea how many miles on the engine. When it blows, 1.6l replacements are cheap.
It's not a pretty car with faded/mismatched paint, clear coat peeling in places (original paint had no clear coat, so it's been repainted), but it gets the job done. While I spend more time driving my actual racecar on the track, I love having a track toy that's cheap, easy to maintain, and can drive to the track. Also, because it was cheap, I'm not going to be too upset when one of the friends I let drive it in driver's school ends up putting it into a wall. Long term, I would really like to turn it into an endurance race car...
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