Hey i was wondering whether or not anyone has ever done a dyno test that compared the stock wheels and tires vs. wheels like volk ce28n genesis with their tires and how much power to the wheels could actually be recovered from doing that? any rims would be great im just wondering what the difference would be.

 

going to a lighter wheel doesn't make more power, it will accelerate quicker though.

 

it should generate less drivetrain loss though and that gain in acceleration would need to show up somewhere from power

 

if you were to dyno it, more power would register. I have a Dsport that they did back to back testing on some wheels on a 350z to see if there were any gains and though they were minimal, there were gains.

 

The engine is making the same power regardless, but less rotating mass can help you get more power to the ground since the engine is using less effort to spin stuff.

 

First of all, this is the wrong section (see the sticky). Secondly, you don't get something from nothing (simple physics). Making the wheels or flywheel lighter does not add horsepower although it might make the car accelerate faster.

 

it isn't about it magically adding horsepower, it is about the drivetrain robbing less of it getting to the wheels....

 

This is a legit question...Buschur dyno'd a car with normal wheels and light wheels and showed more power.

Yes the engine isn't making more power but as EvoX2nr said, less is lost through rotational mass.

I myself lost 15whp by going to 10.5" rims.

 

Thank you very much that was an answer to my question. I wanted to know a general idea of how much power was gained, or free'd up ( i should of stated free'd up in my question originally) i know the engine is making the same power regardless, i also should of stated before how much power at the wheels.

lowkey i Thought this was the correct thread since i am asking about dyno results, not "simple physics." Making the wheels or flywheel lighter doesn't add horsepower, your right, but it frees up robbed power due to inertial forces. F=ma i know my physics thanks

All i was asking were the numbers lol

 

You confuse friction of gears etc in the drive-train with the inertia of wheel weight.

 

Except it's not. If you have dyno results you wish to share, you post it here, together with a Dyno graph. All explained in the sticky above.

 

I am not trying to get in a pissing contest over anything with you because now you are just trying to find some little way to be right to yourself, but friction in gears is going to do the same thing that a heavier anything in the drivetrain is going to do... slow you down. Plain and simple. Call it what you will, but in the end, every little item from the clutch to the tires is going to give you a loss throughout the drivetrain

 

qft

 

I remember picking up 2 tenths in the quarter when I changed from my heavy stock stealth wheels to enkei rpf 1's which are both 17" I think it was about 20-30lbs of rotating mass saved.

 

very useful contribution to the discussion