smart51
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| posted on 11/9/05 at 07:30 PM |
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tyre pressures for BEC
What tyre pressures should I use for a BEC. I expect the weight to be a little less than 450kg.
I have 195/50R15 tyres and they are currently pumped up to 2.0 bar. This is beacuse the same tyres on my Smart ForTwo are recomended at 2.0 bar. I
guess that the lighter BEC may want less, but how much?
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JoelP
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| posted on 11/9/05 at 07:34 PM |
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experiment, its down to personal taste and driving style. Typically between 16 and 20 psi though. Some people run full pressure though. tyre compound
will affect it too.
[Edited on 11/9/05 by JoelP]
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andy d (rizla)
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| posted on 11/9/05 at 07:34 PM |
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 on the road 20psi on a track i found 15psi the best
thats with 195 55 15
[Edited on 11/9/05 by andy d (rizla)]
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mr loo
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| posted on 11/9/05 at 07:36 PM |
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around 18 psi as a starting point.
cheers
Ian
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smart51
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| posted on 11/9/05 at 07:36 PM |
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I think that there is 14.5 PSI in 1.0 Bar. 15/16 PSI is really low 20PSI is only 1.4 bar. I guess that a BEC is much lighter than a production car.
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shortie
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| posted on 11/9/05 at 07:42 PM |
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I run 16psi all round
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andy d (rizla)
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| posted on 11/9/05 at 08:07 PM |
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if you run above 20psi a bec becomes very skittish
15-18psi improves everything ahundred persent,and tyre wear is even
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Jon Ison
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| posted on 11/9/05 at 08:42 PM |
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I run yoko 048's, they recommend that the optimum pressure is 21psi when up too temp.
On the road i would guess around 18/19 as a starting point.
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ChrisGamlin
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| posted on 11/9/05 at 08:45 PM |
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Agreed, Ive never used over 20psi in mine (185/60-13" ), i usually aim for around 18psi hot when on track, and usually run 18-20psi on the
road.
However, lower profile tyre often need to run higher pressures to keep the rim away from the tarmac!
[Edited on 11/9/05 by ChrisGamlin]
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colibriman
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| posted on 11/9/05 at 11:43 PM |
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im running 048's too and found 21psi was too hard...
I've settled(for now) on 16 all round when cold..
what compound you on Jon? medium?
need a bike engine? - www.colibriman.com
SVA ready Mk Indyblade possibly for sale.....if the offers good...!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Jon Ison
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| posted on 11/9/05 at 11:51 PM |
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yup, medium, getting tyre info of other runners is like pulling hens teeth, there a great bunch but tyre pressures, everyone as one of them guards
round there gauge that you see on credit card pin number thingys,
i have run 16 but found higher pressures better, what sort of pick do you get, if i start at 16 i would struggle too get up too 20, maybe on the left
rear but no where else,
George polley recommended too me 21 when hot but thats a max. Thats not start of race 21psi but 21psi when you come off.
The optimum way to get your pressures correct is trye temp across its width after a hard session, needless too say a even temp = correct pressure, hot
in middle too high, on edges too low.
are we good enough during testing too increase/decrease 1 psi and then drive exactly the same too see if there is a difference, maybe not?
p.s. ZX12, i here youve one coming in, deal on a blackbird or do i sell that on ?
[Edited on 11/9/05 by Jon Ison]
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colibriman
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| posted on 12/9/05 at 12:04 AM |
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my trouble is, doing sprints they only start to bite after first couple o laps..then its over normally after the 3rd..
so my medium compounds aint getting warm enough...they have brought out a soft compound since i bought mine...
I certainly aint good enough to notice 1 psi of difference, first time today ever driven it in the wet....I was spinning like a good un...went over
the line backwards..
mine are usually up to around 18psi after a sprint run,
edit ; just give me a call and we'll have a gab...collecting it this week fuel protests permitting...
[Edited on 12/9/05 by colibriman]
need a bike engine? - www.colibriman.com
SVA ready Mk Indyblade possibly for sale.....if the offers good...!
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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