What is the point of using a data logger in SM? You can do a huge laundry list of things to your Miata in your own garage prior to any track session/race that will be far more useful. This list will get you within striking distance of the leaders, regardless of even having a weaker engine. You can run a 250k km engine and still be pretty good providing it has even compression. Here is a partial list; - do a compression test. If the pressures are above 150, you are good. - install new NGK spark plugs & new wires. - check coil pack for any cracks, replace if suspect. - install a cheap paper air filter (often). - advance your timing by installing a performance timing wheel and adjusting it by the crank angle sensor. - clean/dyno the injectors. A miss firing injector will fire more fuel, thus richening the mixture. - NB cars run rich. Install an adjustable fuel pressure regulator and lower the pressure slightly. - add -2.5degs of camber in the front wheels, with as much caster as possible. Adjust the rears as much as possible, maybe -3.0 degs. - remove the cat & the rear O2 sensor (not required). - install the full 2-1/4" SM exhaust. - set toe at 0 for front and back (baseline). - set rear swaybar to the softest setting (hole at rear). - set front ride height at 4-3/4" to pinch welds in rocker lip. - set rear ride height to 4-7/8" - scale the car. get the cross weights to as near 50/50 as possible. - install a hardtop. Aerodynamics are very important. Drafting works even at AMP! No one at the runoffs are running without a roof. - run your tires 40psi (hot)
There are lots of other things as well. However, if you perform the basic list above and get a bunch of seat time, you will get your car fast. Seat time is so important. You can gain many seconds just by learning where the best braking zones are, fast in/fast out corner entry/exit speeds. That can gain you up to 10mph on the back straight alone. I don't care what you are running for an engine. A junk yard engine will still get you a 1:21 with the above setup and a bunch of seat time. So if are not running a 21 yet, then look at everything else. You have about 12 weeks to get her ready for action. Tons of time...
_________________ GT1 - 88 Camaro 1LE/Nissan 200SX GT2 - 90 CRX/Nissan 200SX GT3 - 88 CRX/1975 Civic/1997 Acura Integra GT4 - 93/2000 Mazda Miata GT5 - 89 Suzuki Swift GTI GT6 - 86 CRX ITE - 88 Camaro 1LE ITA - 89/90 CRX Si ITB - 85 Civic 1500S/89 Suzuki Swift GTI ITC - 85/86 Civic SM - 93/2000 Mazda Miata Targa NL - 88 CRX Si Rally Sprint - 95 Del Sol VTEC Unlimited - All of the above!
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