Board Thread:Game Discussion/@comment-2600:1004:B100:9807:F1B0:12B9:E961:D319-20180516125102/@comment-26829117-20180518071522

The numbers I record in the gold blog are minimum upgrades achieved by a known driver (i.e. a trusted source of information). It used to be that anyone could complete an SE with these minimum upgrades and either these drivers have gotten better (Speed Junkie is a regular Group A in WTTT) or the special events have gotten harder. However, most cars have been winnable with around 3333333 upgrades which means typical guidelines for the special event cars would be:
 * 250 for PORSCHE 911 GT1-98
 * 318 for PORSCHE 917K

The LTS cars can be worked out as soon as someone gets the PR values for upgrades. I normally do this but haven't been able to yet. Someone has the information because the upgrade prices are known already. However, similar estimates give the following numbers for the 2018:
 * 295 for PORSCHE 911 RSR (2018)

The one thing you can almost guarantee is that you are unlikely to need to upgrade a car more than it is required to be upgraded to complete any series it is in, unless it is a spare car like the PORSCHE 911 GT1-98. Whilst this has happened a couple of times, most notably with the FERRARI LAFERRARI, it has been the exception rather than the rule.