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> kilometrajul mai merge dupa schimb roti?

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tyyy84
post 9 Dec 2005, 16:09
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Am avut roti standard 165\70\13 iar acum mi-am montat 185\60\14

Intrebarea mea este:dupa ce am schimbat 70\13 la 60\14 kilometrajul de la bord(ceasul)mai indica corect sau are eroare si daca da este mai mare sau mai mica distanta care mi-o arata???


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Ov
post 9 Dec 2005, 16:13
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http://www.miata.net/garage/tirecalc.html


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costi
post 9 Dec 2005, 16:15
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ce naiba adresa i-ai dat acolo ?
teoretic, o roata de 185 parcurge o distanta mai mare decit cea de 165 la o invirtitura DAR semnalul vine din cutie asa ca..... no problem

This post has been edited by costi: 9 Dec 2005, 16:56


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paulp
post 9 Dec 2005, 16:18
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PAi e buna (doar ca-ti trebe Java ca sa mearga smile.gif)
Ideea e ca la parametrii aia, cind iti arata vitezometru 100, ai in realitate 97.5/h wink.gif


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costi
post 9 Dec 2005, 16:24
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omul nu se refera la viteza ci la kilometraj (distanta)


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paulp
post 9 Dec 2005, 16:50
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Ai dreptate, se refera la kilometrii parcursi. E asa cum ai zis tu smile.gif


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ssilviu
post 9 Dec 2005, 17:06
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da, se modifica kilometrajul. In cutie, pentru o rotatie completa, kilometrajul inregistreaza ca distanta parcursa, aceea parcursa de o roata cu diametrul original. Noul diametru este mai mare cu 3%, deci si distanta parcursa, va fi mai mare cu 3% decat ce-ti arata tie la kilometraj. Deasemenea, eroare vitezometrului va fi mai redusa. Din fabrica, eroarea din vitezometru este in minus: iti arata 100, ai 94. Cu noile roti mai mari, iti creste viteza maxima, scade acceleratia, si in vitezometru, iti arata 100, dar tu de fapt ai 98. Niste valori aproximative..wink.gif

This post has been edited by ssilviu: 9 Dec 2005, 17:07


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paulica
post 9 Dec 2005, 17:16
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Imi permiteti sa va contrazic. Dupa calcule pe site-ul dat de Ov si verificate dupa aia pe calculator reiese ca:

Specificatie|Sidewall| Radius| Diameter| Circumf| Revs/km| Difference
165/70-13| 116mm| 281mm| 561mm| 1763mm| 567| 0.0%
185/60-14| 111mm| 289mm| 578mm| 1815mm| 551| 2.9%

Deci semnalulu vine din cutie si iti arata tie 1 km dupa 567 de invârtituri. Tu cu noile caucicuri in 567 de invârtituri faci de fapt 1.029 km. Deci ceasul tau arata mai putin, ceea ce si cred ca te intereseaza daca vinzi masina.
ATENTIE! Când vitezometrul arata 50km/h tu ai de fapt 51,45 km/h.
Numa' bine.

This post has been edited by paulica: 9 Dec 2005, 17:23


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ssilviu
post 9 Dec 2005, 17:25
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pai si eu ce am zis?smile.gif


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tyyy84
post 9 Dec 2005, 17:32
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Am inteles...de fapt ma interesa pt a face consumul...
In cazul asta daca imi arata ca am mers mai putin ,imi va da un consum mai mare dar in realitate este mai mic decat cel care imi iese!!!cred ca am inteles mersiiiii mult


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Smiley
post 10 Dec 2005, 08:48
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QUOTE(costi @ 9 Dec 2005, 17:15)
ce naiba adresa i-ai dat acolo ?
teoretic, o roata de 185 parcurge o distanta mai mare decit cea de 165 la o invirtitura DAR semnalul vine din cutie asa ca..... no problem
*




ok, acum ca stim teoria, sa aflam si ce-i cu practica.

185 (respectiv 165) reprezinta latimea caii de rulare a cauciucului. adica latimea cauciucului cand privesti masina din fata/spate. si indiferent ca latimea asta e de 165mm sau 185mm sau 2m cat e la tractoarele cu care se niveleaza asfaltul, distanta parcursa de roata la o rotatie completa nu depinde de ea. ci de diametrul rotii.



uite aici http://www.carbibles.com/tyre_bible.html o pagina cu o gramada de informatii. verifica la "A tyre size calculator" ce schimbari se vor petrece dupa ce schimbi cauciucurile.


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Smiley
post 10 Dec 2005, 08:50
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QUOTE(tyyy84 @ 9 Dec 2005, 18:32)
Am inteles...de fapt ma interesa pt a face consumul...
In cazul asta daca imi arata ca am mers mai putin ,imi va da un consum mai mare dar in realitate este mai mic decat cel care imi iese!!!cred ca am inteles mersiiiii mult
*




din cate stiu eu, cresterea latimii cauciucurilor determina si o crestere a consumului.

This post has been edited by Smiley: 10 Dec 2005, 08:53


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