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Evacuare rapida ( serpisori )

the_rifle

By the_rifle
in Seria 3

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the_rifle Newbie

the_rifle

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A incercat cineva sa-si puna evacuare rapida pe motorul M50B25 ?

 

Eu am tras o tura in forja cu evacuarea toata data jos si n-am vazut nici o diferenta. doar dadea rateuri si scotea flacari...

 

Ciudat este ca de obicei simt daca am 30 de kg in plus pe masina ( benzina de exemplu ) . Ehhh in acest caz nu am vazut nici o diferenta... :)

 

Se spune ca o evacuare cat mai scurta ( pe total general ) are un randament maxim. Adica evacuarea de pe masinile cu motor spate...

Eu am avut evacuarea foarte scurta. direct la motor dar nici o schimbare...

 

Care e duda cu evacuarea rapida ca eu nu ma prind...

Astept alte sugestii...

Edited by the_rifle
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Guest poleposition

Guest poleposition

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"Serpisorii" au acea forma specifica gandita pentru a permite gazelor din evacuare sa nu creeze "back pressure" tocmai prin acea forma imbarligata, astfel:

 

The idea behind an exhaust header is to eliminate the manifold's back pressure. Instead of a common manifold that all of the cylinders share, each cylinder gets its own exhaust pipe. These pipes come together in a larger pipe called the collector. The individual pipes are cut and bent so that each one is the same length as the others. By making them the same length, it guarantees that each cylinder's exhaust gases arrive in the collector spaced out equally so there is no back pressure generated by the cylinders sharing the collector.

 

Castigul de putere este undeva la 7 CP pe motor natural aspirat si mai mare pt turbo.

 

Headers makes the exhaust gases come together more smoothly than stock before entering the cat.

They can be expensive (up to $1000), but there is still a couple of RD headers on ebay sometimes.

 

BmwE34.net recommendation: Definitively get it if you have a modified intake with a polished cylinder head.

HP gains: 7 to 30Hp (with forced admission)

 

http://www.bmwe34.net/E34main/Other/Misc/headers.jpg

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rmg Newbie

rmg

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Poti sa pui, dar nu trebuie facuti dupa ureche. Serpisorii sunt ganditi sa se comporte si ca un extractor de gaze pe evacuare. In functie de tipul de motor se imperecheaza astfel incat vidul sau vacuumul creat de eliberarea cu presiune a gazelor pe un cilindru sa traga dupa el aerul eliberat de celalalt cilindru pereche. Plus diametrul nu trebuie facut dupa ureche pt ca pierzi cuplu, lungimea pana la fiecare cot trebuie sa fie aceeasi la toti cilindri. Unii producatori fac serpisori pt cuplu, altii pt turatie. Sunt deja destui care fac replici dupa serpisori de firma si ies ok iar pretul e clar sub unul de firma.
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the_rifle Newbie

the_rifle

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AHA ! Acum am inteles... Merci pt explicatii.

Mda... aveam unele probleme de logica... :)

 

O evacuare "cam asha" cum va pare ?

http://piese-auto.anunturi-auto.4tuning.ro...Bmw-375803.html

 

Cea aratata de Pole e mai imbarligata... deci mai buna cred...

Edited by the_rifle
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Guest poleposition

Guest poleposition

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AHA ! Acum am inteles... Merci pt explicatii.

Mda... aveam unele probleme de logica... :)

 

O evacuare "cam asha" cum va pare ?

http://piese-auto.anunturi-auto.4tuning.ro...Bmw-375803.html

 

Cea aratata de Pole e mai imbarligata... deci mai buna cred...

 

nu conteaza cat e de imbarligat, este foarte important, cum zice si "rmg", ca lungimea fiecarei tevi sa fie egala, iar diametrul sa fie unul corespunzator, altfel poti avea pierderi de putere.

 

Poza pe care ti-am pus-o este a unui sport exhaust header pentru e34 525i, motor M50, cum ai tu cred pe e36.

 

Din cate stiu, M3 E36 are exact asa serpisorii stock, deci daca poti face rost de unele de m3 e36 ar fi ideal, pentru ca motorul e tot in 6 cilindri, dispusi in linie.

Edited by poleposition
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duxter Newbie

duxter

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Am pus eu pe e39-ul meu M52B25, am si evacuare dubla, oricum diferenta este...in principal cuplu, se simte altfel parca urca si altfel in ture.

Serpisorii sunt din inox t-304, se incalzesc foarte tare fata de cei stock degaja si mai multa caldura ca inainte.

 

http://www.bmwclub.ro/forums/index.php?s=&...st&p=789439

Edited by duxter
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rmg Newbie

rmg

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Se pot imbraca in niste fasii din banda termoizolanta. Micsoreaza temperatura la motor (mai ales la cele turbo) si cica ar scoate mai repede gazele din cauza temperaturii mai mari (presiune mai mare)care ramane in interiorul tevilor.

Din ce am vorbit cu unul altul, sunt pareri impartite. Unii zic ca de la aceste benzi se pot fisura tevile, din cauza temperaturilor prea mari. Insa e posibil ca si calitatea tevilor si a sudurilor sa aiba un cuvant de spus.

Eu personal cred in utilitatea lor, mai ales pt scaderea temperaturii in compartimentul motor.

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the_rifle Newbie

the_rifle

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Am pus eu pe e39-ul meu M52B25, am si evacuare dubla, oricum diferenta este...in principal cuplu, se simte altfel parca urca si altfel in ture.

Serpisorii sunt din inox t-304, se incalzesc foarte tare fata de cei stock degaja si mai multa caldura ca inainte.

 

http://www.bmwclub.ro/forums/index.php?s=&...st&p=789439

 

 

Se vede foarte mishto.

Sunt cumparati sau facuti ?

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duxter Newbie

duxter

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Arata oarecum asemanator cu ce am gasit eu ?

 

http://piese-auto.anunturi-auto.4tuning.ro...Bmw-375803.html

 

Astea: http://images.channeladvisor.com/Sell/SSProfiles/12001098/Images/6/SSH-E469900.gif

 

Tot Inox T-304, 4 locuri pt Lambda..bla bla.

 

 

LE:

 

 

Product Description

 

Generic Performance Headers are Made with T-304 Stainless Steel, Mandrel Bent Tubing, CNC Machined Flanges.

Each Set is Tested and Dynoed to Make Sure the Fitment and Performance to Meet the Standard.

 

Spec & Features:

 

T-304 Stainless Steel with Polish Finish

Gain More performance Due to More Air Flow

3 Stage Polish Shine Like a Mirror

Increase 10-16 Horse Power and Torque

Direct Bolt-On Installation

 

 

 

* Application: BMW 3 Series E46 099-00 323i, 328i, 323is, 328is, 323ic, 328ic, 323Ci, 328Ci

* Fit on Engine: 2.5L/2.8L V6(6 Cylinder/6CYL)

* Header Type: 6-2-1 2pc

* Inlet/ Outlet size: 2.0", 2.25"

* Number of O2 Sensor Hole: Four (4)

Edited by duxter
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