changing wheel diameters??

[impulsesv6]

ok i have 245/35 R19 wheels on my sv6 (OD of 654mm)
[for reference standard sv6 is 235/45R17 (OD of 643mm)]

if i was to put stocko steel wheels on the rear - 205/65R15 (OD of 647mm)

on a dyno would it read the car as putting out more RWHP?, and would it make it quicker down the 1/4 mile?

[AttaBoy]

I'm not sure but wouldn't the dyno operator put in the wheel dimensions details anyway??

[VLDavo]

yea it would register as bigger reading.... my mate had his vk up in canberra and was only chucking out 280rwhp and the guys dynoeing it said if he changed his rims back down to 15s it would push out abit more