User blog comment:Mr. Mysterious Spyman/Multiplayer T&T Renewal/@comment-31443857-20171001221259/@comment-27736210-20171002120106

For which car?

For the Porsche 959, it's already been proven that 0505 5500 is better than 0505 0505.

My personal favourite tune that I've found is 0505 5502 and I will be upgrading my Porsche 959 to that level soon. I will systematically do the upgrades so that I can record the stats (times the Multiplier) for several tunes that are between my current one and this new one.

The tires upgrades are more efficient than the exhaust upgrades because the heavy acceleration ranks in the exhaust upgrades are big enough to outweigh the increased speed boost from the nitro upgrades.