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Title: Stelanje - tajming bregastog vratila Post by: Zeljko on August 31, 2007, 11:55:05 PM Evo konacno video zapisa kako je ljepo demonstrirano kako i na koji nacin se stelaju, zakrecu brgasta vratila..
Ukoliko motor ne ide a dobro ste odradili tajming bregastih problem potrazite negdje drugdje a ne nasumicnim i nestrucnom zakretenjem bregastog vratila. VRLO VAZNO: Prilikom kupovine bregastog-ih vratila OBAVEZNO morate imati papir na koje su podaci o liftu u TDC tzv vaga. Kao i sve detelje o zracnostima vremenu otvaranja u stupnjevima itd. http://www.youtube.com/watch?v=RAt_A6VeIC8 (http://www.youtube.com/watch?v=RAt_A6VeIC8) Title: Stelanje - tajming bregastog vratila Post by: dr.Maljak on September 01, 2007, 01:57:23 AM posto je moj motor sastavljen od 10 fiatovih...tako imam bregastu od 1.4 turba remenicu od 1.6 blok 1.6 i lim na kojem je oznaka faze bregaste od 1.3 pa nikako nepase faza...kad sam trazio fazu mjerio sam kutomijerom...nema tih papira...treba to dat naprintat na karton...
Title: Stelanje - tajming bregastog vratila Post by: crank on September 01, 2007, 08:02:06 AM isto ovako je i barba zeljko meni nastelao ,samo sto je bio zeleni papir :sunce::rock:
Title: Stelanje - tajming bregastog vratila Post by: CRAHSTEST_DUMMIE on September 01, 2007, 09:39:23 AM stari moj kupujem mašinu sa dve bregaste, filmić je strašno kvalitetan, dečki su to predobro objasnili...
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on September 01, 2007, 04:49:33 PM Nemojte tako slagati oni filozofiraju :xexe: rekose tamo neki zlobnici...
2 maljak, STO MU GROMAOVA" karamba KARAMBITA... PA lako je to naci sigurno imas stupnjeve i mm lif koliko je otvoren usis a koliko ispuk hada je 1 i 4 klip u GMT... trbaju ti dva kutomjera.. i rijesen stvar.. mozes i ovako kao i na snimci... jedan kutomejr i jedan komparator da vidis lift.... Title: Stelanje - tajming bregastog vratila Post by: dr.Maljak on September 02, 2007, 11:25:03 PM O karamba pa ja kazem da sam nastelao...:hmmm:
Title: Stelanje - tajming bregastog vratila Post by: ALFALUDjAK on September 03, 2007, 02:38:45 PM jel to vrijedi za sve turbomotore?
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on September 03, 2007, 02:54:03 PM takav ekspert :supak:a ga znas izvaliti... stari moj..
Title: Stelanje - tajming bregastog vratila Post by: ALFALUDjAK on September 03, 2007, 05:46:36 PM e babo moja pa ja pitam jel to vrijedi u pravilu za sve turbake ili kako?
meni je overlap ostao od atmosferca i to nije dobro kazu talijani :) Title: Stelanje - tajming bregastog vratila Post by: gonzohr on September 03, 2007, 06:45:19 PM Quote Originally posted by e babo moja pa ja pitam jel to vrijedi u pravilu za sve turbake ili kako? meni je overlap ostao od atmosferca i to nije dobro kazu talijani :) zato sam ja poslušao tvoj savjet i stavio samo usisnu retardirao je max za 7,5 stupnjeva:headbang: Title: Stelanje - tajming bregastog vratila Post by: Tcode on September 03, 2007, 07:50:40 PM Quote Originally posted by gonzohr Quote Originally posted by e babo moja pa ja pitam jel to vrijedi u pravilu za sve turbake ili kako? meni je overlap ostao od atmosferca i to nije dobro kazu talijani :) zato sam ja poslušao tvoj savjet i stavio samo usisnu retardirao je max za 7,5 stupnjeva:headbang: Ali ti voziš šveđana, ovo ti vrijedi samo za talijane :deal:LOL Title: Stelanje - tajming bregastog vratila Post by: gonzohr on September 03, 2007, 07:54:34 PM :pivo::pivo:
Title: Stelanje - tajming bregastog vratila Post by: ALFALUDjAK on September 04, 2007, 07:54:27 AM upravo tako, samo usisna se mjenja ali treba zakretna remenica,
ja cu stavit obadvije stalajuce ali me muci kako nariktati a da ne napravim goru stvar nego je sada :) Title: Stelanje - tajming bregastog vratila Post by: Zeljko on September 04, 2007, 02:07:38 PM ti si genije ti su cudo prirode,... ti to mozes
Title: Stelanje - tajming bregastog vratila Post by: ALFALUDjAK on September 04, 2007, 03:25:19 PM samo ti prcaj, a kad sastavis zutog stojadina ja ti bum ubacio M8 maticu u turbinu :)
Title: Stelanje - tajming bregastog vratila Post by: Robi on September 04, 2007, 08:01:49 PM pa smanji overlap, sta je to tolka filozofija? :)
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on September 05, 2007, 06:42:27 AM nisam ja vec dobrim djelom iz teksta pjesme josipe lisac LOL
Title: Stelanje - tajming bregastog vratila Post by: gonzohr on September 06, 2007, 11:21:34 AM evo alfa možda ti ovo malo pomogne
http://www.alcester-racing-sevens.com/cam_timing.htm (http://www.alcester-racing-sevens.com/cam_timing.htm ) Title: Stelanje - tajming bregastog vratila Post by: ALFALUDjAK on September 06, 2007, 11:36:39 AM jebeno!!! :car::car::car:
ali ja neznam engleski :lose::ljutko: Title: Stelanje - tajming bregastog vratila Post by: gonzohr on September 06, 2007, 11:42:08 AM oš na njemački:Crash:
Title: Stelanje - tajming bregastog vratila Post by: gonzohr on September 06, 2007, 11:43:43 AM evo ti još jedan jednostavniji
http://www.max-boost.co.uk/max-boost/cylhead/cams_C20LET.htm (http://www.max-boost.co.uk/max-boost/cylhead/cams_C20LET.htm) Title: Stelanje - tajming bregastog vratila Post by: Zeljko on September 06, 2007, 12:07:35 PM ma to je sve bezveze... to su "filozofije" to se ide odokativnom metodom strucnije... oko puta pi LOL
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on October 05, 2007, 08:09:49 PM Evo diagrama kako bi to izgeldalo na mjerenju ukoliko tajming bregaste je pravilan, retardiran ili advansiran.
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on October 05, 2007, 08:14:37 PM Quote Originally posted by gonzohr evo ti još jedan jednostavniji http://www.max-boost.co.uk/max-boost/cylhead/cams_C20LET.htm (http://www.max-boost.co.uk/max-boost/cylhead/cams_C20LET.htm) Dobra stranica. Title: Stelanje - tajming bregastog vratila Post by: fire on October 05, 2007, 09:12:05 PM Nebi na grafu crveni trebao biti malo veci od plavog na niskim okretajima? I nebi vrh zelenog trebao biti iznad vrha plavog(znaci veca vrijednost)?
Title: Stelanje - tajming bregastog vratila Post by: Zeljko on October 05, 2007, 09:19:54 PM Uvjeri se sam...
Title: Stelanje - tajming bregastog vratila Post by: sime on November 01, 2007, 12:07:20 PM Ako imate bregastu o kojoj neznate nista onda je ugradite ( tu mislim za SOHC motor ali isto je za svaki) i prvo izmerite komparatorom otvaranje usisnog ventila u TDC onda se prebacite i izmerite visinu izduvnog i sakupite obe vrednosti i podelite na 5 dela 3 dela stavite da otvara usisni a 2 dela izduvni to je mozda idealno ali moze treba i malo jos podesiti. + - ali za bregastu o kojoj nemate pojma netreba misliti da je nemoze ustelati .....
Title: Re: Stelanje - tajming bregastog vratila Post by: Zeljko on January 23, 2011, 10:16:05 PM Calculating Overlap
Home At the end of the exhaust stroke and the beginning of the intake stroke both the intake and exhaust valves are open at the same time. This period of time (in degrees) is know as the Overlap Period. The overlap period has a profound influence on the running characteristics of the engine. It effects both the low speed and high speed characteristics the engine. There are a couple different ways to calculate the overlap of the cam. 1) The easiest way is to add the intake opening times to the exhaust closing time. Seat to seat times (advertised duration) must be used. .050" durations or timings will not give the correct overlap. Example: Comp Cams EX268H Adv dur: int 268º, exh 280º 110 LSA, 106 ILC (4º advance) Valve timing @ .006" intake opens @ 28º BTDC Intake closes @ 60º ABDC Exhaust opens @ 76º BBDC Exhaust closes @ 26º ATDC In this example the overlap is 54º (28º+26º) 2) If the seat to seat opening and closing times are not known, the overlap can be calculated using the advertised duration and the Lobe Separation Angle (LSA). This formula works for both single and dual pattern cams. Add the intake and exhaust adv durations Divide the results by 4 Subtract the LSA Multiply the results by 2 Using the example cam above: 268+280=548 548/4=137 137-110=27 27*2=54 The overlap is 54º Here's another example: Comp Cams XE294H Adv Dur: int 294º, exh 306º 110 LSA, 106 ILC (4º advance) Valve timing @ .006" Int opens @ 41º BTDC Int closes @ 73º ABDC Exh opens @ 87º BBDC Exh closes @ 39º ATDC Adding the int open and exh close times (41+39) the overlap is 80º Using the formula above: 294+306=600 600/4=150 150-110=40 40*2=80 The overlap is 80º These are the valve timing overlap ranges that are most likely to work correctly (thanks to David Vizard for providing this): trucks/good mileage towing 10-35 degs overlap daily driven low rpm performance 30-55degs overlap hot street performance 50-75 degs overlap bracket/oval track racing 70-95degs overlap dragster/comp eliminator engines 90-115 degs overlap As you can see the XE268H cam falls at the top of the daily driver range and the bottom of the hot street range. It will have a civil but noticeable idle with good vacuum. The XE294H cam is in the middle of the bracket/oval track range. It has a radical idle and low vacuum. |