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Joined: Sep 2000
Posts: 9,602
Hard-core CEG'er
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Hard-core CEG'er
Joined: Sep 2000
Posts: 9,602 |
Originally posted by Mod-Deth:
Not in anyway disregarding what was written, but in all probability he's gonna run 225/40/18s on them.
Falken 512's in that size weigh 21.6lbs.
So now the combined weight is 36.6lbs.
True the 512 is an ultralight tire. There are 225/40's that weigh over 28lbs as well. Tire choice plays a large factor in the end results.
Using that 37lb 18" combo it would be.
+35 lbs accelerating
+90 lbs braking
Using a 28lb tire (43lb combo) it would be.
+245 lbs accelerating
+470 lbs braking
Yes tire weight is paramount to this type of calculation.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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Joined: May 2002
Posts: 21,653
I have no life
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I have no life
Joined: May 2002
Posts: 21,653 |
Gearing changes from different tire sizes will also affect acceleration numbers (to a much lesser degree than weight). Just something to keep in mind (not that you didn't already know Demon). Here's something neat: http://the-welters.com/racing/rotational.html
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15
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Joined: Jun 2000
Posts: 314
CEG\'er
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CEG\'er
Joined: Jun 2000
Posts: 314 |
This thread got me thinking and searching for tire weights.
I can't believe the Kumho Ecsta ASX is so nice and light.
Kumho - 23 lbs
Yoko H4S - 25 lbs
Avon M550 A/S - 27 lbs
in 225/45-17.
According to an inertia calc I downloaded, each of those 2 lb increases is like having an extra 60 lbs riding around in your car! Wow.
Are these Ecstas really that light?????? That's a couple pounds lighter than most 16" tires by other brands. Data was from TireRack.
Brian
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Joined: Jul 2003
Posts: 3,816
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Jul 2003
Posts: 3,816 |
Originally posted by DemonSVT:
Stock E1 = 19.5lbs
225/50 Falkien = 22lbs
Total = 41.5lbs
Your 18" rims = 15lbs
235/35/18 XXX = 25lbs
Total = 40lbs
The E1 Falkien combo requires 14.48 lb/ft of torque (per tire) to rotate and stop rotating.
The 18" combo requires 16.41 lb/ft of torque (per tire) to rotate and stop rotating.
So what you're saying is... these are not a good choice for my lawnmower? Because I was under the impression that a 16" or 18" wheel would look pretty snazzy on there.
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Joined: Dec 2005
Posts: 62
CEG\'er
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CEG\'er
Joined: Dec 2005
Posts: 62 |
Originally posted by bxd20:
According to an inertia calc I downloaded,
Where did you get that inertia calc?
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Joined: Aug 2001
Posts: 4,639
Hard-core CEG'er
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Hard-core CEG'er
Joined: Aug 2001
Posts: 4,639 |
edgeracing lists some tires weights. t1s 215/4517 they have as 20lbs.
Hugo AIM:omegazodiac
95 gl & 99 contour svt #1750/2760
my profile pics stuff for sale
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