The best place to discover wheel impact is to review what DD4H has for sale. His numbers let you figure out the relative improvements with the different design wheels.
For example: The 1.8 gr. Cheetah extreme gives you 0.08 sec. improvement over std wheel. Even if you are not perfect in your wheel prep, if you put both a standard wheel and the Cheetah Ex through the same prep- you will still get this big improvement. Now not all 1.8 wheels are alike, the moment of inertia plays a big part in speed, and if you can still make a strong light wheel ( which the Cheetah Ex is), it's unbeatable. I can not do a simple model of a different wheel. Each wheel needs a lot of "fudge factor"" to account for it's performance. Some wheels made by a different process will have a bigger bore- that will be slower. It can be made faster with using a bigger diameter axle, but not ever get up to the top speed you can get with the Cheetahs and the 0.092 axles.
So a rough guess would be if you were running DD4H product and getting 2.95 as an example, then cars using standard wheels would be running at 3.03 sec. ( assuming they were also making a good car like yours- way slower if just slapping stuff together.)