| MIATA BUILD |
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 | |  | November 13, 2013 - Wiring fun!
This poor car has been through a lot. I stripped out the harness when I built it, and modified it for my purposes. When the original V8 conversion was done, the engine wiring came from a 2002 Firebird - but had already been installed in another Miata. Then I kept modifying and tweaking things, changing the harness around further. Wires for electric windows, cameras, dataloggers, extra sensors, goofy rear wings and the like. It's a bit of a mess.
With the new engine, I'm installing a standalone engine computer and wiring harness. I'm taking this opportunity to revisit all the wiring in the car, removing the leftover bits from the four cylinder build and that junkyard GM stuff. This under-dash harness will be greatly simplified, and the whole thing should be much more robust when I'm done.
It sure looks horrific when it's unwrapped and spread out! The junkyard GM parts are still wired in, and the new GM wires are also looped around like snakes in this shot. Fun stuff.
entry 1113 - tags: engine, 6.2, wiring | | |  | November 25, 2013 - Progress!
After hours of tracing wires, the harness is getting slimmer and more robust. It's pretty entertaining seeing the convoluted path taken by some of these. I've removed several big connectors and just streamlined the harness overall. The Coralba rally computer and Peltor intercom wiring is better now. It'll be a lot easier to maintain this setup. It still looks a bit frightening because the harness is unwrapped, but it will be all tied up and secured before the dash cover goes back on.
entry 1114 - tags: engine, 6.2, wiring | | |  | November 25, 2013 - Here's the real progress.
That's the Miata fusebox in stripped-down mode. What's missing? The main relay! Yes, the relay that failed and cost us the win at Targa Newfoundland. It gives me much glee to pull this little sucker out.
It's been replaced by the new GM Performance Parts wiring harness, with wiring that's built to run a big hefty V8 with eight hungry high-energy coils. The Miata relay was designed to handle a quarter of that.
As you can see, a number of other fuses and relays are also missing from the stock fuse box as they're simply not needed any more.
entry 1115 - tags: engine, 6.2, wiring | | |  | November 27, 2013 - Paco Motorsports is a new sponsor of the Targa car, and here are a few goodies that are being installed.
The master cylinder brace (available from Flyin' Miata) is a simple bolt-in, and it makes a pretty dramatic difference to the amount of flex in the braking system.
You can also see the base for the new shock tower brace. It's no coincidence that this is compatible with the master cylinder brace. It's a step up from the one I've been using for the past few years, both in terms of strength and with improved access to the shock adjustment knob. I like it.
There are some new prototype parts from Paco on the way
entry 1116 - tags: brakes, bracing, paco motorsports | | |  | December 10, 2013 - Farewell, Gander.
The Targa Newfoundland organizers have announced the biggest change to the route in the event's history. The rally will no longer head for the Gander region. This means the loss of many of my favorite stages: Leading Tickles, Port Blandford, Bobby's Cove, Pleasantview - and of course, Gander.
Leading Tickles (which is known by different names depending on how long the stage is in a given year, and which direction you're going) is a rockship blast through the woods on a curvy road with patches on patches. You have to be on top of your game, and if you're in a well set up car with good suspension it's magic. It also has consequences, this is the stage that took out the factory MINI in 2008 in a high speed crash that left car parts all over the woods. Oh, it also has the best stage name in the event.
Bobby's Cove wasn't super-challenging, it was just smooth and very fast. That's the stage where I passed a 30 km/h speed limit sign doing 179 km/h, always a favorite moment.
Gander, of course, is one of the famous stages. It's 5 minutes of mayhem, a flurry of identical left-right-left corners as you rampage through a fairly nondescript subdivision. It was ferociously difficult to finish without penalties, and always a highlight of the race for fans and competitors. Even just standing by the road and hearing the half-dozen cars currently on course roaring away out of sight behind the houses was entertainment.
As a result of these changes, the event is now more compact, with slightly shorter transit times. That's nice, but it will be a shame to lose what was arguably my favorite day of the race. The time schedule has also been tightened up, with registration and odometer check on the same day as the prologue and the awards gala on Friday night after the last day of racing. The first change means less time to deal with potential scrutineering problems and less time for the navigators to work on their books, the latter means Friday will be a very, very long day.
Take a few minutes to honor a couple of the greats.
Leading Tickles 2011
Gander 2008
The photo is from Gander in 2011, taken by Zach Bowman.
entry 1117 - tags: news, route, gander, pleasantview, bobbys cove, leading tickles | | |  | January 20, 2014 - Look who's Miss November on the Grassroots Motorsports calendar!
If you want the coolest Miata in the world on your wall (in November, anyhow), you can either get one from Grassroots Motorsports ($1.50, right here!) or get one free with an order from Flyin' Miata.
entry 1118 - tags: calendar | | |  | February 5, 2014 - Drive time!
Between snow storms, I took the car out for a quick spin down the road to see how the new engine feels and to make sure everything was healthy. The result? It feels very healthy indeed. The engine is a gem, it's got a wickedly sharp throttle response that just begs to be played with. It's reminiscent of the old high compression 2.0, but it's got some serious power and torque behind it. The car has the potential to be very hard on your neck. I didn't drive far, but it was a real promise of what to expect on future drives. The new 6.2 is a lot more potent than the old 5.3 was.
As for the keychain, it was a present from my friend Adam at Revlimiter.net. He does custom gauges and just started doing keychains, so he sent me a Martini one for the racer. I like it a lot. Thanks!
entry 1119 - tags: engine, 6.2, test, martini | | |  | March 27, 2014 - Dyno time!
Was all that engine swap work worthwhile? Short version: yes. The car spun the rollers at 466 hp and 432 lb-ft. Even better, it was making 300 ft-lb at 1700 rpm and more than 400 from 2900 to 6100. That's one healthy little car.
Here's the dyno run - the whine is from the tires on the rollers.
In other words, yes. It was well worth the work. The old 5.3 made decent power, but didn't have that massive amount of torque. On the road, it's just ridiculously eager, ready to rip forward at any moment. The 6.2 with the ASA cam has the same light feel as the old high compression 2.0 that I used to run, but with approximately three times as much power.
Wow, that puts it in perspective. Nearly three times as much power as the 2008 Targa Newfoundland spec.
entry 1120 - tags: dyno, ls3, 6.2 | | |  | April 17, 2014 - One thing I've noticed recently is that the Optima battery is starting to struggle a bit.
Now, we found a very high failure rate on Optimas when we were using them at FM at the time this one was installed. I've been lucky so far, but I decided to replace it proactively with an Odyssey. I ran an Odyssey PC680 in the car when it was a four cylinder and it was a great little unit. This PC925 is a bit beefier for the big engine, but it will drop some weight and will ease my concerns about reliability.
entry 1121 - tags: battery | | |  | April 17, 2014 - With the extra power, it's time to upgrade the braking.
Speed is a much bigger factor when it comes to braking than weight is.
The previous front setup was a typical one, with a Wilwood Dynalite caliper, two-piece 11" rotors and Performance Friction PFC97 pads. I loved the pads, they would always stop the car hard regardless of pad temperature. But they were hard on rotors when they got too hot or too cold, and the track work with the 5.3 was running them too hot so the pads were also starting to suffer.
So it's time for a new 6-piston Dynapro. Nice big pad area to go with the new rotors. I'm going to try some Wilwood compounds, starting with the E flavor. There's also a full set of H pads on my shelf if I need to be more aggressive. We'll see how it works. At the back of the car, I already have Wilwood Powerlite calipers with E pads. Basically, I'm now running the Flyin' Miata "Big Mama Jama Stage 2" kit.
Combined with the big master cylinder and the brace, I have one very solid brake pedal. Highly reassuring with this power/weight ratio!
entry 1122 - tags: brakes | | |  | April 20, 2014 - First track test!
Finally, a chance to let the big engine off the leash. And of course, it was raining in the morning. Yeah, that was a big slidy adventure with the slick RA1s.
But eventually, the track dried. And the car woke up. Let's get the fun stuff out of the way: it's a beast. No surprise. But holy cow, it's everything it should be. On the second gear corner exits, throttle modulation is the name of the game - or big black stripes on the pavement as an alternative. But hit third, and it'll hook up solidly and turn into a rocket. Third gear is awesome in the true sense of the word. The car just teleports forward.
This led to my biggest problem of the day - brakes. Thanks to the changes in traction levels, it took me a while to discover that I was set up with far too much front bias on the proportioning valve. That's a sign that my previous setup was definitely struggling. But even when I dialed it back, I was still having trouble getting the car slowed. Why? Because my braking point on the front straight had moved back by 40' or so, to the point where I was actually having to brake before the start/finish line. That's about the same place where Brandon was slotting third in his 1.6 Miata. I couldn't get past that, and kept trying to brake later followed by more big black stripes on the pavement.
I did manage to put down a 1:02.905, followed by a 1:02.908. Then I started overdriving and slowing down, eventually flat-spotting some tires as I tried too hard. So it didn't get any faster. I'm a bit disappointed I didn't manage to match my previous best, but that was a fast day when everyone was setting personal records. I'll spend some more time fine-tuning the brakes and go through the whole chassis setup, then we'll see what happens next time.
Mechanically, the car was solid. The engine never missed a beat and proved to be really easy to modulate. So that's a big success.
Video! This was one of the fastest laps.
entry 1123 - tags: testing, brakes, video | | |  | July 8, 2014 - High speed track testing.
The recent track test at the local track was fun, but the car felt a bit like a caged animal. So I trekked out to High Plains Raceway to run with the Z Car Club of Colorado. These guys always put on a smoothly run day, with the opportunity for lots and lots of track time. I had new H compound brake pads and was ready.
How was it? Spectacular. I had a ridiculous amount of fun. The first session was one a mismatched set of tires, RA1s on three corners and a Nitto NT01 on the other. The Nitto wasn't working as well as the Toyos so the car had uneven handling left and right.
I then swapped on a set of new Toyo RRs on 9" wheels. Wow, what a difference. The chassis now had the grip to match the power, and I was able to go into full rampage mode. The chassis setup was perfect and I was able to just drive. I spent the rest of the day chasing down a variety of cars, including another LS3-powered Miata. The one car I never got to play with was a Viper with race rubber - he started one session right behind me, but pulled off after a single lap. Top speed was about 135 mph into a headwind. At the end of that straight there was a fairly intense braking zone which had me hanging off the harnesses and giggling.
Video!
Unfortunately, the car wasn't perfect. The speed and the braking zones (five major braking events per lap) meant I was putting a lot of heat into the brakes, and the fluid started to boil. I was using ATE Super Blue which is pretty good stuff, so I'm going to take a look at improving the ducting further and run something that runs a bit hotter. I could manage the heat in the brakes by being a bit cautious on braking. The coolant temperature was good - even on the very hot day and running for 30 minutes, I never got into a problem zone.
At the end of the day, I bailed early. This group starts combining run groups near the end of the day and extends the length, which meant that I had the chance to run for a full hour with a bunch of poor B, C and D drivers getting blown into the weeds by the Targa Miata. With the brakes soft, I decided there was nothing to be gained so I packed up after the end of the regular sessions. Still, it was a good day. So much fun.
entry 1124 - tags: high plains, track, testing, brakes | | |  | July 21, 2014 - More track time at the Grand Junction Motor Speedway.
But first, some news from the last event. My maximum speed (into the wind) on the back straight at High Plains was either 215 or 217 km/h that day - I forget. At the previous event which was run with the old L33 engine, my top speed was 197. That's an 18-20 km/h (11-12 mph) speed difference. Huge! This new engine is a hero.
You can see the car's on new wheels. Those are Advanti Storm S1s in a 15x9 size. They're part of a new breed of light and strong flow formed wheels. Despite being the biggest wheels I've ever had on the car, they may also be the lightest at 12.1 lbs. Excellent.
I've also swapped back to the fixed wing so I can concentrate on other things. It's still working well at higher speeds, but I didn't think it would help as much on the slow little Grand Junction track. I also want to experiment with some aero balance, so it's being used as a control for now.
Inside the car, I added some reflective gold heat shielding inside the transmission tunnel to mellow out the interior.
And of course, after all that work, the fuel pump failed as I was driving the car home the day before the track event. A late night run to the Flyin' Miata shop and a pump swap, and it was in full health again. It's about the best place it could have failed.
After all the planned and unplanned prep work, how was the track? Pretty fun. We built a black V8 track car at FM that has a lot of parts in common with mine. I accidentally ran a 1:00.2 in it while heat-cycling some Hoosiers, so it's quick. The new owner was at the track, and we spent some time playing tag. Here's the noisy result. While he has an advantage with those big fat Hoosiers, I know the track far better and you can hear me backing off the throttle early on a number of spots as I try to judge his braking points and adjust to his speed. Those Hoosiers are great around the tightest corners, but he was leaving a lot of time on the table on the long sweeper. Fair enough, it takes some time to get comfortable there.
I spent a bit of time haring around as well. The brakes felt good, although I was being careful to avoid lockups. The track's developed some new bumps in a couple of critical braking zones, although it's also quite possible that I'm going faster in said zones. The car was understeering in the long sweeper, which seems to be the fastest setup based on my times. Despite scorching summer temperatures nearing 100F, I put down repeated laps in the 1:01 range with a best of 1:01.692. I was hoping there was more in it, but I think the driver is too slow and it was hot!
Fun setup note: my tires were showing signs of a good setup. 100% consistent pressures at the end of a session across all four wheels, and the temps were dead even across the front tires. The rears were a bit hotter as I went inwards, which looks like camber. Not dramatically, though, and I'm going to keep playing with aero for balance.
Overall, the car's good. It's ready for the big FM Summer Camp in a couple of weeks. Which will again be very hot.
entry 1125 - tags: testing, video, wheels, aero, setup | | |  | August 3, 2014 - FM Summer camp track time!
This is a tough event for the Targa Miata. Two days of double sessions, giving rides to FM customers in brutal heat. I figure I did over 100 hard laps of the track in two days. Everything worked well. Despite the heat and the short, tight track, the car ran at normal temperatures. I wasn't taking it terribly easy on the brakes, and they also dealt well with the heat.
The blue car in this awesome picture by Travis Ingram is Elvis, another V8 car. It's got AFCO suspension with a bit less spring rate and the same basic tire setup that I do - and it provided a very dramatic visual example of how effective the aero is on the long sweeper as I came rampaging up on his rear bumper with a very high closing speed. Quite exciting for the passenger in Elvis as he saw me bearing down, too. There was also a great example of the wing's wake when a drone above the track got thrown around by the rooster tail from the car - I'll try to get the video of that.
I found the car to be pushing a bit on the tight track with the setup that had been working so well at High Plains a few weeks ago. There was no time for tuning, so I just drove around it after softening the front sway bar. I've found the car is fastest with a little bit of aero-induced understeer on the fast sweeper, but it was a bit more than I prefer. Next time, I'll try playing with tire pressures although they were right at my target. Even after about 150 laps of this track and the recent High Plains track day, the tires are looking good. The Toyo RR is my new favorite track day tire.
There was one small area of concern. At the end of the last session, I had an odd noise in the steering. A clunk at a specific point of steering angle. Fearing the worst, I got under the car - and found that a motor mount heat shield had moved out of place and was making contact with a bolt on the steering column. Well, that's an easy fix! Whew.
entry 1126 - tags: testing, summer camp | | |  | August 13, 2014 - An interesting upgrade.
I'm seeing a bit of oil in the intake from the PCV system, and came across this factory part for the Camaro ZL1. It's an oil separator, designed to pull oil out of the air being recirculated. Installation is easy, it just replaces the filler cap.
Well, it would be easy on a giant Camaro. It wasn't even close to fitting under the hood. After a bit of head scratching, I tried swapping the valve covers around and it tucks in nicely by the firewall. Let's hear it for symmetrical heads! We'll see how this works out.
entry 1127 - tags: engine, ls3 | | |  | August 13, 2014 - Adjustable rear control arm test.
First note: white gets grubby handprints all over. This part is a new adjustable arm from Paco Motorsports that will be available from Flyin' Miata soon. It'll let me adjust camber in the rear without affecting toe, which is a nice ability to have. The fact that it uses stock size bushings is a bonus as well.
It's also designed for maximum suspension travel. To my surprise, I found that the previous aftermarket upper control arm wasn't quite so good in this regard and had been making contact with the body of the car at full compression. The body of the car lost, so there's some damage to the lip above the arm. No problem, although it would explain why the hit on full compression seemed a bit abrupt.
entry 1128 - tags: suspension, testing, control arm | | |  | August 26, 2014 - Wet track day!
This was supposed to be the big shakedown before the Laguna Seca event. The weather, unfortunately, had different plans. I took the car out on the sodden track on my treadless Toyos, but it was just a big slither-fest. So I took it home after one session. I still did okay, running about the same speed as a 4WD 911 on all-seasons and an Evo - but it wasn't telling me anything and wasn't really that much fun.
entry 1129 - tags: testing, wet | | |  | September 13, 2014 - Miatas at Mazda Raceway!
This is always a big event, but this year it was massive with the public reveal of the 2016 MX-5, a world record attempt, a showing of Racing The Rock under the stars and nearly 2000 cars. The paddock was mobbed and the track time was full.
It was also my first time to really let the new engine rip at sea level. I'm still in awe, it's a spectacular thing. Every time we got on the straight, I'd just power past every car in sight. Sure, it may not be as cool as catching a high power car in the corners and working out a clever way to get in front, but the big hammer is still pretty gratifying. Here's what it looked like from inside one of the other cars - I make an appearance at 2:00.
I was taking it a bit easy in the corners. Mostly because there's no prize for being the fastest at an event like this, and I did not want to crash. I was also backing off the throttle as I went over the crest halfway down the straight because the cars entering the next turn had no idea I was coming. With the closing speeds, I was essentially coming out of nowhere. This was a particular problem in the slower Group B, where I had one exciting moment as a Spec Miata moved over close to the wall as I came barreling up with about a 40 mph closing speed. I thought I was going to lose both door mirrors, one on him and one on the wall. The car was actually really well balanced, with a bit of inherent high speed understeer from the aero that could be counteracted with throttle.
The car, unfortunately, was not rock solid. When I had it down at Road Atlanta this spring for display purposes, it went into some sort of limp-home mode on me. I was never able to duplicate it and the car's been great ever since. Well, it started doing the same thing at Laguna Seca. I'd be powering along, and all of a sudden my drive-by-wire throttle would disable after a shift. It's not a fun experience, losing all power just when you're hitting the next gear. I found I could bring it back if I turned off the main battery switch, resetting the ECU. Of course, this wiped any error codes. Eventually, it failed on the way up the hill to the Corkscrew and I was able to coast back to the pits without resorting to the reset. It had to do with the electronic throttle.
Lots of theories bandied about and I tried to eliminate potential interference by wrapping the wiring harness, swapped out the pedal for another and generally got frustrated. It seemed to be heat related - and it alway happened on a shift. So eventually I just left it in fourth gear and avoided shifting all together. Still, I didn't trust the car so I parked it early. A bit of a letdown after the buildup to the event.
My current thinking is that I was hitting an airflow limit on the car's programming. There's one particular table that has to do with the amount of airflow expected for a given throttle opening, and I may have been exceeding it. That would explain why it's never been a problem with high altitude use, and why it happened when I was shifting and getting a big gulp of air when the throttle smacked open again. I'm going to mess with the table and see if I can duplicate the problem at altitude, then we'll see what happens next time it goes down to sea level again. Unfortunately, that probably won't be for another year, and I really don't want any questions around the car at that time. Some troubleshooting lies ahead.
Photo by Ben Sale. It's definitely not the classic Corkscrew shot, I love the different take on it.
entry 1130 - tags: MRLS, laguna | | |  | December 15, 2014 - It's time for some traction.
Maxxis has just introduced a new size of their RC-1 track tire: a nice fat 245/45-15. It's been a long time coming. The tire is aimed at the track day crowd, promising a long life and good traction. I'll be mounting them on a set of Jongbloed 15x10 wheels.
I'll have to do some work to make them fit under the fenders, that's for sure. But I'm looking forward to the first track day in the spring!
entry 1131 - tags: tires, maxxis | | |  | January 15, 2015 - The new track rubber is mounted and ready to try out.
Those are 245/40-15 Maxxis RC-1 tires wrapped around a 15x10 Jongbloed wheel. It's a lot of rubber, and it's going to be a real challenge to get it to fit. I'm a bit worried about the fenders.
entry 1132 | | |
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