|January 14, 2013 - I spent part of the weekend setting up the car.|
Cornerweighting, ride height and alignment. The ride height has changed considerably since the last time it was on the alignment rack, but the new hub stands from FM made this pretty easy to put right. It was pretty revealing how off the alignment was!
I didn't really want to give the stands back, maybe I can find a way to justify a set of my own someday. Springs are now 750 lb front and 450 lb rear, with a pretty low ride height. It should be quicker around our track now - can I duplicate my numbers from last time? Too bad I have to wait a few more months to find out.
entry 1068 - tags: setup, suspension
|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