The weight of wheel will affect your dyno result?????

**edw-R** · 02-12-2004 04:15 AM

Anybody know the weight of wheel will affect the dyno result?? How much they will affect?? For example: 16" wheel. One with 11kg. Another one with 7kg.
Andthen, what do you think with lightened wheel??
Hope can share your opinions

!!!!!

**ian** · 02-12-2004 07:20 AM

good question. i have also pondered about this edw-r..........hmmmmmmmm
somehow, i think it may affect it some way or the other since i certainly feel the difference on the road between my 18" and 15" wheels..........let us see if anyone can shed some light.

**linkorr** · 02-12-2004 07:40 AM

yes it will (read disclaimer

). Weight of the wheel and the level of grip the tyres produces. When u run a dyno, you will want to run a tyre which has a resonable amount of grip, something which will not generate 'too much' friction with the rollers, When you are about to dyno your car, choose a tyre that will give you enough grip to transfer all the power onto the rollers, but not 'stick' to the rollers.

About the weight issue, the ligther wheel takes less power to rotate, therefore increasing your response (as far as the dyno reading is concerned).

disclaimer

I've never run a dyno before, this is all off some megazine, so if anyone can correct what i've said, that'll be good.

**edw-R** · 02-12-2004 05:05 PM

I found some info.
185/65-14 34 lbs = 113.5hp
205/40-17 42 lbs = 108.1hp
205/40-17(another wheel) 43 lbs = 107.9hp
Hope can share with you!!!

**Psyklops** · 02-12-2004 05:10 PM

I would have thought rolling circumference would be just as important as the weight...the further the wheels have to travel would have an effect on this for sure

**Kawasaki** · 02-12-2004 05:20 PM

the heavier the wheel is the slower it will be to get the power up and running, fairly simple science. I want to dyno my ed6 and see what i can put out, whats the price for a dyno run?