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#1
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
si-a pus cineva azot in cauciucuri?
mi-am pus si eu azi odata cu schimbarea cauciucurilor (195/50/15).. masina a deventi mult mai rigida.. am fost de la victoriei pana in herastrau si a trebuit sa merg cu 30-40km/h ca m-a rupt. imi clantaneau dintii in gura de cat de rigida e, desi n-am suspensie sport.. am mai mers acum o sapt cu un prieten cu un 325 E46 sa-si scota azotul din roti din cazua rigiditatii asta.. eu am crezut ca e el nebun, dar am mers si eu cu masina si era rupere. are si suspensie sport (packet M)... la voi cum e? |
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#2
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100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 4,486 Joined: 18-October 05 Member No.: 15 Car: E30 Engine: M42 ![]() |
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#3
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
??? :retard: :retard: |
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#4
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![]() 82% BMW corupt ![]() ![]() ![]() ![]() Group: Members Posts: 882 Joined: 18-October 05 Member No.: 16 ![]() |
nu crezi ca are legatura cu presiunea?
90% din aer este azot ![]() -------------------- A Mercedes fan, Audi owner on BMW forum
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#5
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
nu.. cred :paranoid:
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#6
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Administrators Posts: 8,513 Joined: 17-October 05 From: Bucuresti Member No.: 7 Car: E28 525i Engine: M30 2.5 147cp ![]() |
sau poate cu schimbarea cauciucurilor? inainte parca aveai 205/55? -------------------- Inline 6 in a 5-er 4 ever
E28 528i, E39 525i touring, E39 520i touring, E53 X5 4.4i, E70 X5 3.0si, E46 318i ex E39 520i exclusive, E39 525tds, E46 318d touring, E28 525i, E34 525i, E28 524td, E30 318i, E28 525i |
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#7
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
aveam 205/50 de iarna.
sigur nu e de la roti, desi talonul e mai mic (tot 50 e, dar pe 195). repet, am mai mers cu masina unui prieten si la fel facea. mersem cu masina aia si cu aer, cu aceiasi presiune si nu facea asa.. |
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#8
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![]() 18% BMW corupt ![]() Group: Members Posts: 246 Joined: 21-October 05 Member No.: 43 ![]() |
Am avut azot toata iarna.N-am simtit nici o diferenta.
-------------------- E 39,525dA,2001
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#9
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Administrators Posts: 8,513 Joined: 17-October 05 From: Bucuresti Member No.: 7 Car: E28 525i Engine: M30 2.5 147cp ![]() |
concluzia e ca azotul se comprima mai greu decat aerul?
-------------------- Inline 6 in a 5-er 4 ever
E28 528i, E39 525i touring, E39 520i touring, E53 X5 4.4i, E70 X5 3.0si, E46 318i ex E39 520i exclusive, E39 525tds, E46 318d touring, E28 525i, E34 525i, E28 524td, E30 318i, E28 525i |
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#10
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![]() Road Runner ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 3,336 Joined: 17-October 05 From: La dreacu' Member No.: 9 Car: BMW E30 08/90 Engine: 08/94 M42 318iST ![]() |
N-am observat nici o diferenta. Diferenta e din cauza marimii cauciucului. -------------------- 16 valves, 24 hours a day, 1bar boost. A vulgar display of power. Making boost since 30-06-2008. |
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#11
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
QUOTE (SUPERBEC) nu crezi ca are legatura cu presiunea?
m-am uitat mai devreme si par cam moi.. deci nu e de la presiune! ![]() eu pun pariu ca de la azot e.. am mers cu aceiasi masina cu azot si fara si chiar din dreapta am simtit diferenta.. in fine.. poate sunt eu mai sensibil ![]() |
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#12
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Super Moderators Posts: 2,172 Joined: 26-November 05 From: Bucuresti Member No.: 109 Car: E34 Engine: M50 2.5 192CP ![]() |
QUOTE (jaffar) ursul era oricum foaaarte rigid. o sa vedem la pufi in curind
![]() L-ai vandut? -------------------- |
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#13
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0% BMW corupt Group: Members Posts: 43 Joined: 11-April 06 Member No.: 249 ![]() |
QUOTE (florin83) QUOTE (SUPERBEC) nu crezi ca are legatura cu presiunea?
m-am uitat mai devreme si par cam moi.. deci nu e de la presiune! ![]() eu pun pariu ca de la azot e.. am mers cu aceiasi masina cu azot si fara si chiar din dreapta am simtit diferenta.. in fine.. poate sunt eu mai sensibil ![]() Nu are ABSOLUT nici o influenta azotul asupra rigiditatii. Se comprima si se dilata la fel ca si aerul. |
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#14
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![]() 73% BMW corupt ![]() ![]() ![]() ![]() Group: Insiders Posts: 746 Joined: 21-December 05 From: Ploiesti Member No.: 135 ![]() |
QUOTE (paul) Nu are ABSOLUT nici o influenta azotul asupra rigiditatii. Se comprima si se dilata la fel ca si aerul.
Pai atunci care-i explicatia ca se foloseste si azotul pt. a umfla rotile, cand cel mai simplu e sa se foloseasca doar aer? -------------------- 316
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#15
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![]() 82% BMW corupt ![]() ![]() ![]() ![]() Group: Members Posts: 882 Joined: 18-October 05 Member No.: 16 ![]() |
ati vazut voi vre-o butelie de azot lichid pe la vre-o vulcanizare ???
![]() sry parca aerul are 78% azot? -------------------- A Mercedes fan, Audi owner on BMW forum
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#16
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Root Admin Posts: 8,263 Joined: 18-October 05 From: Bucuresti Member No.: 13 Car: E36 325i Engine: M50 192CP ![]() |
lichid? pt ce?
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#17
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 1,723 Joined: 19-October 05 From: Bucuresti Member No.: 29 Car: BMW E46 318I 2002 Engine: N42 2.0 143CP ![]() |
QUOTE (florin83) aveam 205/50 de iarna.
sigur nu e de la roti, desi talonul e mai mic (tot 50 e, dar pe 195). repet, am mai mers cu masina unui prieten si la fel facea. mersem cu masina aia si cu aer, cu aceiasi presiune si nu facea asa.. talonul nu e mai mic, e la fel, latimea e mai mica :nod: ...si sa stii ca s-ar putea sa fie de la cauciucuri, sa fie un pic mai tari si din aceasta cauza sa ti se pare masina mai rigida..azotul nu are nici o legatura cu taria suspensiei, poate doar daca ti-a bagat o presiune fantastica, dar nu cred....un exemplu iti dau chair la mine la masina...luni am fost si am schimbat cauciucurile(luasem niste cauciucuri Fate de la Autosoft 205/50) masina era rigida, tremura cand treceam de 80km/h, cereau multe grame de plumb la echilibrat etc...o tzeapa de cauciucuri, scumpe si proaste si m-am dus si le-am schimbat cu unele noi noute 205/45 Tyfoon si am bagat azot si crede-ma ca acum masina e mai putin rigida decat cu cele dinainte desi am talon de 45).. ![]() -------------------- ex...e36 316i ex...e30 327i ex...e46 318i ex...e60 520i today just off-road - Navarone |
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#18
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 1,723 Joined: 19-October 05 From: Bucuresti Member No.: 29 Car: BMW E46 318I 2002 Engine: N42 2.0 143CP ![]() |
oricum de la azot nu e sigur... ![]() -------------------- ex...e36 316i ex...e30 327i ex...e46 318i ex...e60 520i today just off-road - Navarone |
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#19
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 1,580 Joined: 20-October 05 From: Bucuresti Member No.: 37 Car: E46 Schwarz2 Engine: mic dar viguros ![]() |
azotul nu prea ingheata cu una cu 2 iar aerul care il bagi contine umiditate
-------------------- To the aiiiiiiirport
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#20
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0% BMW corupt Group: Members Posts: 43 Joined: 11-April 06 Member No.: 249 ![]() |
QUOTE (comisaru) QUOTE (paul) Nu are ABSOLUT nici o influenta azotul asupra rigiditatii. Se comprima si se dilata la fel ca si aerul.
Pai atunci care-i explicatia ca se foloseste si azotul pt. a umfla rotile, cand cel mai simplu e sa se foloseasca doar aer? E simplu : sa-ti ia ochii si banii ![]() Se zice ca azotul ar avea avantajul ca protejeaza jentile si cauciucul ca nu contine asa multi vapori de apa ca aerul din atmosfera. Se mai zice ca ar avea nu stiu cum moleculele de trec mai greu prin cauciuc si cica se pierde mai greu presiunea. Singurul lucru cert este ca nu intretine arderea si de aceea se foloseste la anvelopele de avioane. Si eu am azot si evident ca nu am observat absolut nici o diferenta ... |
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#21
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![]() Road Runner ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 3,336 Joined: 17-October 05 From: La dreacu' Member No.: 9 Car: BMW E30 08/90 Engine: 08/94 M42 318iST ![]() |
Un lucru care l-am observat: am pus azot in rotile de vara la inceputul verii trecute, iarna le-am pus la pastrare si acum 3 saptamani le-am pus din nou pe masina si le-am verificat presiunea si nu au fost pierderi semnificative.(0.1)
-------------------- 16 valves, 24 hours a day, 1bar boost. A vulgar display of power. Making boost since 30-06-2008. |
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#22
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0% BMW corupt Group: Members Posts: 43 Joined: 11-April 06 Member No.: 249 ![]() |
QUOTE (jaffar) principalul atu al azotului pentru cauciucuri este acela ca nu este afectat de schimbarile de temperatura, deci presiunea in roti ramine aproape constanta tot timpul anului si in orice conditii.
Fizica e de alta parere ... O remarca, gresita dar frecventa, legata de azot este ca anvelopele umplute cu acest gaz si-ar schimba mai putin presiunea in functie de temperatura. Adica ca azotul ar fi mai putin dependent de temperatura. FALS. Toate gazele se supun legii Gay Lussac : La un volum constant presiunea si temperatura absoluta a unui gaz sint direct proportionale. Deci nu conteaza gazul, poate fi aer, heliu, azot, toate au aceeasi variatie de presiune in functie de temperatura. Daca la 20 grade C avem 2 atm., la 40 grade C presiunea va fi : 2 atm. x ( 313K/293K) = 2.13 atm Presiune creste cu 0.13 atmosfere |
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#23
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82% BMW corupt ![]() ![]() ![]() ![]() Group: Members Posts: 871 Joined: 23-October 05 From: bucuresti Member No.: 49 Car: E30 Engine: S54 3.2 343 cp ![]() |
paul are dreptate, pt cine nu crede sa verifice manualul de clasa a 11-a de fizica
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#24
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Administrators Posts: 8,513 Joined: 17-October 05 From: Bucuresti Member No.: 7 Car: E28 525i Engine: M30 2.5 147cp ![]() |
Si eu tind sa-i dau dreptate lu Paul, cu o observatie legata de calculul facut:
presiunea din formula trebuia sa fie 3 atm (2 atm in cauciuc diferenta fata de presiunea atmosferica, plus o atmosfera) Oricum, ideea e aceeasi. Cine demonstreaza ca azotul are caldura specifica mai mare decat aerul? Chiar daca s-ar demonstra lucrul asta, dupa o perioada suficient de mare de timp, temperaturile pneu aer vs pneu azot se egalizeaza, avantaje putand sa apara doar la burn-uri (fie ca sunt pe accelerare fie pe franare) cand temperatura cauciucului creste brusc si apoi scade repejor. -------------------- Inline 6 in a 5-er 4 ever
E28 528i, E39 525i touring, E39 520i touring, E53 X5 4.4i, E70 X5 3.0si, E46 318i ex E39 520i exclusive, E39 525tds, E46 318d touring, E28 525i, E34 525i, E28 524td, E30 318i, E28 525i |
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#25
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100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 4,486 Joined: 18-October 05 Member No.: 15 Car: E30 Engine: M42 ![]() |
Aaaaaa deci e bun la cercuri?
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#26
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Administrators Posts: 8,513 Joined: 17-October 05 From: Bucuresti Member No.: 7 Car: E28 525i Engine: M30 2.5 147cp ![]() |
Daca azotul are caldura specifica mai mare decat aerul la ~3 atm, da.
-------------------- Inline 6 in a 5-er 4 ever
E28 528i, E39 525i touring, E39 520i touring, E53 X5 4.4i, E70 X5 3.0si, E46 318i ex E39 520i exclusive, E39 525tds, E46 318d touring, E28 525i, E34 525i, E28 524td, E30 318i, E28 525i |
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#27
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![]() 100% BMW corupt ![]() ![]() ![]() ![]() ![]() Group: Administrators Posts: 8,513 Joined: 17-October 05 From: Bucuresti Member No.: 7 Car: E28 525i Engine: M30 2.5 147cp ![]() |
uite ca asta n-o stiu sigur, dar traiam cu impresia asta...
-------------------- Inline 6 in a 5-er 4 ever
E28 528i, E39 525i touring, E39 520i touring, E53 X5 4.4i, E70 X5 3.0si, E46 318i ex E39 520i exclusive, E39 525tds, E46 318d touring, E28 525i, E34 525i, E28 524td, E30 318i, E28 525i |
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#28
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![]() CSL fan ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 1,944 Joined: 11-December 05 From: Bucharest, Pta. Romana Member No.: 120 Car: e39 530da touring Engine: 3.0D ![]() |
eu stiu k si pneurile de formula 1 sunt umplute cu azot tot din cauza faptului ca nu isi schimba volumul la diferente de temperatura.
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#29
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0% BMW corupt Group: Members Posts: 43 Joined: 11-April 06 Member No.: 249 ![]() |
QUOTE (n3o) eu stiu k si pneurile de formula 1 sunt umplute cu azot tot din cauza faptului ca nu isi schimba volumul la diferente de temperatura.
Nu confunda stiinta cu credinta ![]() Ai cam chiulit la fizica ![]() |
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#30
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![]() CSL fan ![]() ![]() ![]() ![]() ![]() Group: Insiders Posts: 1,944 Joined: 11-December 05 From: Bucharest, Pta. Romana Member No.: 120 Car: e39 530da touring Engine: 3.0D ![]() |
nu ... doar k nu prea am trecut pe la ea
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