Talk:Research & Development/Mazda RX-8 Special Edition/@comment-35401637-20180723071723

So for those of you who don’t have any rotary engine to begin with, there’s two tokens options that I can think of to win this R&D depending on your skills.

1. If you are not very skilled or just not confident enough, then use the tune 5505 0050 (8 engines) until the final AI and then spend 2100 tokens to auto pass the final AI.

2. If you are a Pro and can beat the final AI with the minimum tune of 5505 2050 (10 engines) within the 3 days tight time limit of lab 4, then consider buying 2 R&D engine boxes with 2x750 tokens which should guarantee 1 engine per box.

The bottom line is, option 2 is 600 tokens cheaper than option 1 and you get 2 engines+18 other pro kit cards, but it’s much riskier since you might still ended up paying 2100 tokens to auto pass test 44 due to not having enough time to retry the final AI.