David S. Wallens
David S. Wallens Editorial Director
7/3/00 8:22 a.m.

With its new aluminum flywheel and host of Jackson Racing parts (http://www.jacksonracing.com), our Miata is just humming along. Once the temperatures get back into the bearable range, we'll run another set of 0-60 times. (The last set of runs were done on an 80-degree day; lately it has been about 95 degrees outside.)

On a different note, Pettit Racing's Cameron Worth (http://www.pettitracing.com) really, really wants us to turbocharge the car. Doing so would definitely mean having to upgrade the differential to a later Torsen unit, but it is a tempting option. We'll keep you posted, and if you have any feelings about us going the forced-induction route, let us know.

We were hoping to keep the car legal for SCCA's C Street Prepared class, but that idea is quickly going away. Plus we recently received Dealer Alternative's (http://www.dlralt.com) Flyin' Miata big brake kit to test and evaluate, more equipment that's not CSP-legal. We are also taking another look at our tire choice. We originally went with the Michelin Pilot SX MXX3 since it's one of the best high-performance tires available. Unfortunately, they're also on the heavy side--that's fine if you have the torque of a Camaro or Porsche 911, but a 100-horsepower Miata doesn't really have the muscle to spin them with authority.

We recently had a good, rebuildable cylinder head dropped off at Engineered Performance (http://www.engineered.net) for a little machine work. They will be sending it to their machine shop, Clark Engine Works (phone 770-590-5226), for a little R&R--little of this and a little of that. Our goal is to strengthen the car's performance in the 4000 to 7000 rpm range. A set of Unorthodox Racing (http://www.unorthodoxracing.com) adjustable cam gears will also be installed.

The plan is to install the rebuilt head in time so we can tune the car at our upcoming Dyno Day. Look for Part I of the project in the October issue.

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