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twindongs
Fordmods Oompa Loompa
Posts: 27
Joined: 20 Apr 2008
Location: perth WA, Australia
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 Posted: Thu Jun 12, 2008 9:16 am Post subject: will 18" bf cobra wheels slow my car down?? |
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Hey guys
I own a el xr6 5 speed.
At the moment i have the standard 16" xr rims on it but i am looking at getting some 18" bf GT/Cobra copy wheels from ebay. Now my question is will these be much heavier then my stock wheels?
As i really do not want them to slow the car down (ran a 14.5 the other week with just exhaust and cai).
I have had a previous experience with another car of mine where the mags i brought slowed the car down massively and even created poor fuel consumption!
I have asked the guy for the total weight of one rim and he said he has nothing to weigh them with....
Any help would be grand!
Thanks!
link to wheels:
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&rd=1&item=320259281743&ssPageName=STRK:MEWA:IT&ih=011 |
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EFFII
Fordmods - Getting Side Ways
Age:17
Posts: 1354
Joined: 26 Jul 2006
Location: Melbourne VIC, Australia
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| Posted: Thu Jun 12, 2008 10:26 am Post subject: |
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| they will but when you go for a run put the 16" back one. |
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fordfreak ef
Cruise Moderator
Age:25
Posts: 8228
Joined: 17 Apr 2005
Location: ya mums bed! lol NSW, Australia
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| Posted: Thu Jun 12, 2008 10:51 am Post subject: |
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| 15/16s leave for the track.. 18's are not going to make a huge difference to fuel consuption.. however.. your driving stle whether being a heavy lead foot or p***y footer will have more of a bearing on fuel consumption... |
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fnp
Fordmods - Getting Side Ways
Age:23
Posts: 4175
Joined: 24 Mar 2005
Location: Perth WA, Australia
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| Posted: Thu Jun 12, 2008 11:52 am Post subject: |
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| They will make your car slower, partly with more weight and partly with the large circumferance acting like a slightly higher diff ratio. |
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ello567
Fordmods Newbie
Posts: 7
Joined: 03 Aug 2007
Location: Sydney NSW, Australia
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| Posted: Thu Jun 12, 2008 11:54 am Post subject: |
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i got similar wheels off ebay, 18 inch bf GT wheels, i weighed them and they were 25kg each with tyre, that was 5 kg heavier than the fairmont alloy wheels i had on at the time. i heard somewhere that for every 1kg added to the wheels is like adding 9kgs to the car, dunno if its true but the car felt a little slower, but it was well worth it coz they look sweet  |
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krisisdog
Fordmods - Getting Side Ways
Age:19
Posts: 1551
Joined: 30 Oct 2006
Location: Grafton NSW, Australia
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| Posted: Thu Jun 12, 2008 12:11 pm Post subject: |
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| I'd buy em and use them on the street, then go for a couple of runs at the strip with them on, then with 16"s on the rear, then with 16"s all round again. You'll soon work out if your slower and by how much. |
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relaxed_diplomacy
Fordmods - Getting Side Ways
Age:33
Posts: 479
Joined: 14 Dec 2007
Location: delegate NSW, Australia
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| Posted: Thu Jun 12, 2008 12:39 pm Post subject: |
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The extra width acts towards increasing rolling resistance and wind resistance, and therefore acts towards lower speed and greater fuel consumption. Other factors however can mitigate or create an overall opposite effect to these.
Increased wheel weight means the tyres will have a greater effect of being bounced off the road, or at least periods of reduced ground pressure. Other factors however can mitigate the loss of ground pressure or at least the loss of traction, or indeed cause an overall increase.
If the overall diamater is increased, the odometer will under-read by that proportion, and therefore fuel consumption can be missread.
If the suspension and wheel alignment are set up properly for the tyres, they should be better on the track, but again other factors such as tyre tread and compound can swing this in any direction. |
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OsbornThomas
Fordmods - Smokin em up
Age:20
Posts: 283
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Location: Central Coast NSW, Australia
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| Posted: Fri Jun 13, 2008 6:44 pm Post subject: |
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I have some 18" GTP's and they are great, they do weigh a considerable amount more.
I put stockies back on the car and it's s**t, too much wheel spin and she rolls a lot more. |
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twindongs
Fordmods Oompa Loompa
Posts: 27
Joined: 20 Apr 2008
Location: perth WA, Australia
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| Posted: Mon Jun 16, 2008 9:22 pm Post subject: |
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thanks for all the help guys
i have decided against the wheels.
i just enjoy doing skids to much!! |
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FordFairmont
Fordmods - Getting Side Ways
Posts: 3000
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Location: Sunny QLD, Australia
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| Posted: Mon Jun 16, 2008 9:34 pm Post subject: |
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when i went from 15x6" stockies to 17x8" mags i swore it felt more sluggish.
But at the same time, i could launch it harder with less wheelspin. |
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Lumpy_Camo
Fordmods Parts Gopher
Age:22
Posts: 65
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Location: Hassall Grove NSW, Australia
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| Posted: Sun Aug 03, 2008 3:45 pm Post subject: |
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| FordFairmont wrote: | when i went from 15x6" stockies to 17x8" mags i swore it felt more sluggish.
But at the same time, i could launch it harder with less wheelspin. |
thats due to a bigger circumfrence of the tyres. |
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