Heading to get the car dyno tuned tomorrow.

Will my 18" Y2K Vette rims have that big of an impact on the results? should I switch out the back to the stockers?

I really can't see a 4-5lb difference per back wheel, even if it is rolling resistance, making that big of a deal on the dyno.

Any ideas?

 

people say that it makes a difference and i supose it would since its more rotating mass but i dont think it will make a huge difference

and i have never tested the difference in heavy rims vs stock i dyno my car the way it is driven no tricks just to get a #