Still got my dice, too, great for random decision making among 4, 8, 10, 12, or 20 options!
I noticed all the links above are dead, so I'll go ahead and list the events here with my notes.
First, all non-R manufacturers events can be won fairly by tuning to the best power-to-weight ratio of legal entrants with no other mods, no tranny, no tires, no suspension, nada.
Here they are in order of lowest to highest weight to power ratios (kg/hp) so you can find some challenging events with track randomness:
2.94 - Tuscan Speed Cup - very hard but fair, may want sports tires+susp
3.31 - Viper Festival - using GSR fair but again hard
3.53 - ZZ Challenge - for ZZ-S
3.64 - Elise Trophy - using 190
4.27 - Impreza Challenge - go for 4.5 for more of a challenge
4.47 - NSX Trophy - using Type S Zero
4.62 - Corvette Meeting - may try 4.8 to 5...
4.67 - DB-7 Trophy - using Coupe
4.69 - RX-7 Meeting - fair though the RS '98 has 4.59
4.77 - Skyline R34 Challenge
4.98 - GT-R meetup
5.04 - Evolution Meeting - using Evo IV GSR fair, others are better
5.04 - Challenge S2000
5.06 - Clio Cup
5.54 - Celica Meeting, this is GT-4 '95, still fair with 6.26 SSII
5.55 - Elan Trophy
5.57 - Type R Meeting
5.67 - Almera - VZ-R N1
5.76 - Delta Cup - this is Integrale
5.90 - Civic Race - this is Type R
5.92 - Silvia 200SX Club - best entrant has 5.00, but 5.92 tough but fair
6.24 - Mirage Cup - Cyborg ZR
6.37 - TT Challenge
6.63 - Altezza Cup - Lexus IS200 also qualifies
6.77 - 155 & 156 Race
6.79 - SLK Trophy
7.01 - SVX Challenge
7.13 - Micra Trophy
7.18 - MR2 Spider Trophy
7.24 - Sirion Challenge, S4
7.25 - Starlet Meeting - '98 fair
7.60 - MX-5 Meeting - '93 fair
7.60 - Neon Trophy
7.71 - MGF Challenge
7.77 - 3 Series - 328i
7.80 - 106 Series - S16
7.92 - Saxo Challenge
8.13 - Golf Cup - GTI 1.8T
9.43 - Focus Challenge
10.00 - Demio Race, GL-X '99 fair though A Spec has 8.28
10.12 - Tigra Cup
11.21 - New Beetle Challenge
11.48 - Cappucino Cup
11.80 - AZ-1 Challenge
12.00 - Mini Challenge
12.00 - Alto Works Cup
12.46 - Beat the Beat
13.00 - Cuore Challenge - Aero fair
13.02 - Yaris Trophy
13.87 - 500 Meeting - Sporting
14.83 - Ka Challenge
18.38 - Midget Contest
For the R events, there's always at least a slight boost in hp observable off the line, but most events are still fair without increasing your hp. In all cases add sports tires, in a few cases add suspension and hard slicks, still haven't found any events requiring tranny upgrades:
2.34 - Tuscan Speed Cup - hard slicks + semi-race suspension, also NA1+chip
2.75 - ZZ Challenge
2.82 - Viper Festival - hard slicks and semi-race suspension advised
3.24 - Elise Trophy
3.28 - Corvette Meeting - used sport suspension
3.99 - DB-7 Trophy - used sport suspension
4.26 - GT-R meetup - 4.4 more challenging
4.26 - Elan Trophy - that's the S4 with NA1
4.36 - Clio Cup - 4.1 maybe more fair
4.39 - Challenge S2000
4.47 - Celica Meeting - fair but tough
4.55 - Delta Cup - turbo1 on Evo
4.80 - Silvia 200SX Club - tough but fair
5.22 - Demio Race
5.26 - Civic Race - maybe 5.1 more fair
5.27 - Altezza Cup - RS200 + NA1
5.42 - Mini Challenge - in between turbo 1 and turbo 2 is fair
5.44 - TT Challenge
5.56 - Mirage Cup - Cyborg ZR
5.63 - Neon Trophy - plus NA1 and chip
5.78 - 155 & 156 Race - 5.5 maybe more fair
5.80 - SLK Trophy
5.81 - Micra Trophy - Super Turbo + muff1 + chip
6.06 - Cappucino Cup - up to 103hp
6.11 - SVX Challenge
6.16 - 106 Challenge - S16 plus NA1
6.33 - MX-5 Trophy - try 6.5 for more of a challenge
6.45 - Sirion Challenge - tough, 6.2 may be more fair
6.48 - Alto Works Cup - '98 with turbo1
6.55 - 500 Meetup - turbo1 on sporting may be a little easy
6.75 - Cuore Challenge - Aero plus turbo1
6.88 - MGF Challenge
7.07 - Saxo Challenge - 6.8 maybe more fair
7.25 - Golf Cup - stock 1.8T still fair
7.46 - Yaris trophy - with turbo1
7.80 - Ka Challenge - with turbo 1
9.02 - Tigra Cup
9.57 - New Beetle Challenge