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Phil Esra <philesra@pacbell.net> from the MR2 list has compiled the following valuable autocross information for the MKI. He gives in the text a comparision of data from other MKI racers. One thing that you might want to remember is that if you do the Powermax air intake modification, you will no longer be in stock class. So if the bracket you are in is important to you, don't make the change, or change it back to stock at the race. You are allowed to change tires, shocks, air filter, (not intake housing), and exhaust. A drop in K&N will hake no gain in HP. 1) ALIGNMENT SETTINGS:
Maximum obtainable camber will depend on whether car is lowered or not. 2) FRONT SWAYBAR Suspension Techniques, 3-way adjustable. Find a shop that will sell you just the front one (e.g. Ground Control) rather than the set. Be prepared to wait while ST get their act together. Set at full-soft or middle setting. Some have drilled hole between these 2 settings. 3) TIRES 185/60 R14:
195/55 R-14:
205/55 R14:
The general consensus so far has been that while the stickiest, the Hoosiers wear very fast and are easy to flat spot. The A032s, RA1s, and V700s differ from this in that while not being as sticky as the Hoosiers they still stick very well, wear very well, and are great overall competition tires. All three are very close to each other in wear to stick ratio. Some even use them as a street/track tire if the car is not used on the street very often. The A008 is a somewhat older tire that while having proven itself, is becoming somewhat dated, and may be discontinued soon. Since most racers will take advantage of putting on as wide of a tire as possible, the AO32 is not often used. Both the RA1 and V700 have proven themselves on the track as race winning tires. 3a) TIRE PRESSURES For the old BFG R1s: 24-30 F, 26-32 R. Pressure difference F to R should
be ~2 lbs.
4) MODEL YEAR TO GET? 1985 due to rear swaybar. 5) WHAT CARS WILL I BE COMPETING AGAINST? C Stock: MkII MR2, '88 6 cyl Pontiac Fiero, '84-85 RX7 GSL-SE, Porsche 924s M030, '89 RX7 GTUs 5a) IS THE MkI COMPETITIVE? Not on a national level. (Neither in C stock nor CSP.) Level of competition varies greatly from region to region. Car is well suited to tight courses lacking long acceleration zones. Car was competitive once upon a time in D stock. 6) SHOULD I GET A K&N FILTER? Most autoxers use these. Some people claim they don't filter effectively. Some people claim they don't increase power. 7) SHOULD I REPLACE THE EXHAUST WITH AN AFTERMARKET CAT-BACK SYSTEM? Probably not very productive. Might save you a few lbs of weight, but won't get you much power. Many will simply take off the rear heavy exhaust, and bolt on a Supertrap to the header. This offers a pretty respectable weight savings of ~15-20 lb. 8) WHAT SHOCKS SHOULD I GET? Koni or Tokico (Illumina) adjustables. Koni has more followers; Tokicos are cheaper. 9) IF MY CAR ISN'T AN '85, IS IT LEGAL TO PUT A REAR SWAYBAR ON? No.
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