Power Loss

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Originally Posted by markasia

Yeah I Felt A Difference When I Put The 20" on, Just If Im Going To Put In I/H/E...is it best to get rid of the 20" ??

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If you want performance. But I think you should post a pic of your rims+tyres if you can't weigh them. Maybe we can use our weighing scale-vision. :)

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Originally Posted by aaronng

If you want performance. But I think you should post a pic of your rims+tyres if you can't weigh them. Maybe we can use our weighing scale-vision. :)

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http://i12.photobucket.com/albums/a2...4122006092.jpg

http://i12.photobucket.com/albums/a2...4122006091.jpg

http://i12.photobucket.com/albums/a2...4122006089.jpg

http://i12.photobucket.com/albums/a2...4122006088.jpg

http://i12.photobucket.com/albums/a2...4122006087.jpg

http://i12.photobucket.com/albums/a2...4122006086.jpg

http://i12.photobucket.com/albums/a2...4122006085.jpg

http://i12.photobucket.com/albums/a2...4122006084.jpg

LOL, that's dark. We don't need pics of your whole car. Just the first pic is ok. And that looks HEAVY. Probably heavier than your normal 20" chromies.

can anyone answer the original question of what the actual loss in performance would be like? obviously the car will be slower, but by how much?

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Originally Posted by Mr_will

can anyone answer the original question of what the actual loss in performance would be like? obviously the car will be slower, but by how much?

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A 1kg increase in rotational weight is about the equivalent to loading up your car with 7-10kg's worth of weight. That's the estimate...

So if each rim is 5kg heavier than stock, and the tyres are an extra, say 3kg, then that's 32kg all around. In terms of sprung weight, it's the equivalent of increasing your car's weight by 224kg. It's significant.

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Originally Posted by aaronng

LOL, that's dark. We don't need pics of your whole car. Just the first pic is ok. And that looks HEAVY. Probably heavier than your normal 20" chromies.

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I just thought it would be a good idea to post alot of pictures, just to show u guys wat my euro looks like!! coz i am a new member here =p

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Originally Posted by markasia

I just thought it would be a good idea to post alot of pictures, just to show u guys wat my euro looks like!! coz i am a new member here =p

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Do that in the introduction section please. In this model section, we try to help you with your problems instead. :)

What's your tyre size btw?

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Originally Posted by claymore

It's not just the weight that makes for a substantial power loss. With 20's the rolling circumference is much larger effectively lowering your final drive gear ratio and that makes a big difference in seat of the pants feel driving the car, and a real measurable difference in real world performance.

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Nah, over here we have/try to keep the rolling circumference to within a certain % of stock. Otherwise, it's a defect. The usual tyre size for 20" rims on the Euro is 235-245/30 R20.

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Originally Posted by aaronng

Do that in the introduction section please. In this model section, we try to help you with your problems instead. :)

What's your tyre size btw?

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I changed it to 225

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Originally Posted by markasia

I changed it to 225

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What's the full tyre size? Is it 225/30 R20?

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Originally Posted by aaronng

What's the full tyre size? Is it 225/30 R20?

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Yes It is....very low profile.

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Originally Posted by markasia

Yes It is....very low profile.

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Then the rolling circumference is only slightly larger than stock. Your power loss is coming from the heavier rims and tyres, as well as the heavier concentration of weight further out from the centre, making it have a larger inertia.