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Old 18-10-11, 20:38   #1
bmw4bl

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Default Raport differential 328i e36

Salut ..

De curand am inlocuit motorul meu 1800is ( 318is -1993 ) cu un motor 2800 M52B28 simplu vanos ( 328i-1998 ) si as vrea sa montez un diferential de 325tds raport 2.56.

Rup ceva la masina? Sau doar pierd demaraj si ma ajuta la drum lung (viteza maxima)

Multumesc
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Old 18-10-11, 23:22   #2
the_rifle

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Default Re: Raport differential 328i e36

nu rupi nimic dar e cam lung diferentialul...Nu-ti trebuie sa mergi cu 280 daca mergi in afara... Cred ca sare de 280 in viteza maxima...
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Old 19-10-11, 00:08   #3
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Default Re: Raport differential 328i e36

Ms mult...

Din demaraj pierd?

0-100km/h tot in 6-7 secunde?
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Old 19-10-11, 05:29   #4
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Default Re: Raport differential 328i e36

In 7-7.5 ajungi cu diferentialul de 2.93 care e de fabrica... Cu cel de 2.56 pe care-l il vrei tu cred ca vei ajunge la 100 in 8-9 sec...

De la 0-100 te va face un 325 ... Cred ca si pe 400 de metri te va face...

Cu treapta intai cred ca vei merge pana in 70-75km/h in limitare...

Daca imi lasi dimensiunile cauciucurilor pot sa-ti spun exact configuratia trepteleor de viteza cu diferential de 2.56 , 2.93 , 3,15 , 3,45 sau cu ce raport de diferential vrei tu...

Last edited by the_rifle; 19-10-11 at 05:39.
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Old 19-10-11, 10:26   #5
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Default Re: Raport differential 328i e36

cu 2.65 la viteza de croaziera (120?) in a5a cred ca ii consuma si mai putin, avand turatii mai putine decat normal cu 2.93, nu?

nu stiu daca se aplica si la regim urban, cu demaraj si treapta a3a maxim.
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Old 19-10-11, 12:55   #6
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Default Re: Raport differential 328i e36

Dimensiuni...225/45/17 masina este coupe

E clar ..2.56 nu (ar fi vis cu un turbo pe masina, undeva la 280 cai parerea mea)

Acum am differentialul de 1,8is si este prea brutal in treapta 1 si 2, dar e foarte aiurea la drum lung..(ieri pe autostrada 150km/h 6000rpm treapta 5)

3,15 , 3,45 as vrea sa stiu .

Multumesc inca odata ..
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Old 19-10-11, 13:13   #7
the_rifle

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Default Re: Raport differential 328i e36

E ciudat diferentialul tau. Teoretic tu ar trebui sa ai 3,45 pe masina care este raportul original de 318is. Eu am 3,45 pe masina si motor de 2,5 fara vanos. Merge in 6500 in a patra la 200. Cred ca ai un diferential mult mai scurt. Cred ca e 4,27... sigur e 4,27... Eu am roti pe 16/55...


Asta e calculul pt dif 3,15 cu cutie de 2.8 cu cauciucuri 225/45/17

Gear Km/h per 1000 RPM Km/h @6500 RPM Km/h @6500 RPM
--------------------------------------------------------
1 9.04 59 59
2 15.24 99 99
3 22.87 149 149
4 30.61 199 199
5 37.96 247 247

Km/h RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
10 1107 656 437 327 263
20 2213 1312 875 653 527
30 3320 1968 1312 980 790
40 4426 2624 1749 1307 1054
50 5533 3280 2187 1633 1317
60 3936 2624 1960 1581
70 4592 3061 2287 1844
80 5248 3499 2614 2108
90 5904 3936 2940 2371
100 4373 3267 2635
110 4811 3594 2898
120 5248 3920 3162
130 5685 4247 3425
140 6123 4574 3688
150 4900 3952
160 5227 4215
170 5554 4479
180 5880 4742
190 6207 5006
200 5269
210 5533
220 5796
230 6060
240 6323

Gear Change RPM drop (change @6500) RPM drop (change @6500)
-------------------------------------------------------------
1 -> 2 -2646 (to 3854) -2646 (to 3854)
2 -> 3 -2167 (to 4333) -2167 (to 4333)
3 -> 4 -1645 (to 4855) -1645 (to 4855)
4 -> 5 -1258 (to 5242) -1258 (to 5242)

------------------------------------------------------------------------







Aici ai calculul pt 3.45 tot cu cutie de 2.8 cu cauciucuri 225/45/17

- diferentele fata de cutia de 318is sunt infime si doar pe treapta a doua ( raportul de demultiplicare este 2,52 fatza de 2,49 pe treapta a doua)


Gear Km/h per 1000 RPM Km/h @6500 RPM Km/h @6500 RPM
--------------------------------------------------------
1 8.25 54 54
2 13.92 90 90
3 20.88 136 136
4 27.95 182 182
5 34.66 225 225

Km/h RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
10 1212 718 479 358 289
20 2424 1437 958 716 577
30 3636 2155 1437 1073 866
40 4848 2874 1916 1431 1154
50 6060 3592 2395 1789 1443
60 4311 2874 2147 1731
70 5029 3353 2505 2020
80 5748 3832 2862 2308
90 6466 4311 3220 2597
100 4790 3578 2886
110 5269 3936 3174
120 5748 4294 3463
130 6227 4651 3751
140 5009 4040
150 5367 4328
160 5725 4617
170 6083 4905
180 6440 5194
190 5482
200 5771
210 6060
220 6348

Gear Change RPM drop (change @6500) RPM drop (change @6500)
-------------------------------------------------------------
1 -> 2 -2646 (to 3854) -2646 (to 3854)
2 -> 3 -2167 (to 4333) -2167 (to 4333)
3 -> 4 -1645 (to 4855) -1645 (to 4855)
4 -> 5 -1258 (to 5242) -1258 (to 5242)








Cu diferentialul ala al tau cred ca rupi orice M pe 400 de metri
Am calculat de curiozitate si cu raport de 2.56 si ar ajunge in viteza maxima la 304 km pe ora daca motorul ar avea putere sa impinga pana la 6500 de ture

1 - 72
2 - 122
3 - 183
4 - 248
5 - 304

Last edited by the_rifle; 19-10-11 at 13:32.
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Old 19-10-11, 13:36   #8
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Default Re: Raport differential 328i e36

Sarumana

( am cutia de de 28 zf )
Cred ca 3,15 ar fi perfect daca pun admisia si evacuarea de 25...nu ma duc la liniute ...vreau doar sa aduc masina la parametri cat de cat ok

Succes
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Old 19-10-11, 13:46   #9
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Default Re: Raport differential 328i e36

Evacuarea nu trebuie schimbata...

Si M-ul de state de 240 de cai tot aceeasi evacuare are... Asa ca la 193 de cai cat ai tu nu trebuie schimbata. Daca vrei totusi sa-i faci ceva scoate catalizatoarele si pune-i serpi de M de europa...
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Old 19-10-11, 19:06   #10
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Default Re: Raport differential 328i e36

O sa montez diff 2.56 de la tds + un turbo , exact 300 cai si te anunt
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Old 19-10-11, 21:33   #11
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Default Re: Raport differential 328i e36

Quote:
Originally Posted by bmw4bl View Post
O sa montez diff 2.56 de la tds + un turbo , exact 300 cai si te anunt
ce usor se fac motoarele turbo..caii....
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Old 20-10-11, 10:32   #12
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Default Re: Raport differential 328i e36

pe IS ai avut cutie automata? daca da, atunci ai grup cu rap 4.1 sau 4.4...ceea ce ar fi preaaaa mult

3.15 carcasa mare/medie cred ca pica la fix.

2.56 e prea lung, chiar vrei sa mergi cu 300 km/h?

turbo ptr ce?

cu un grup 3.15, admisie 2.5 M50 si soft, cred ca e ce trebuie.200+
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Old 20-10-11, 10:38   #13
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Default Re: Raport differential 328i e36

asa cum a spus colegul....daca is-ul a fost automat si differentialul este 4.xx ...spune-mi cat vrei pe el))))
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Old 20-10-11, 11:19   #14
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Default Re: Raport differential 328i e36

Quote:
Originally Posted by myky99 View Post
asa cum a spus colegul....daca is-ul a fost automat si differentialul este 4.xx ...spune-mi cat vrei pe el))))
tu vrei sa schimbi gumele la 2 lluni...?!
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Old 20-10-11, 13:44   #15
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Default Re: Raport differential 328i e36

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Originally Posted by maxmartinez View Post
tu vrei sa schimbi gumele la 2 lluni...?!
nu m-ar deranja))
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