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Toymods » Tech & Conversions » Is 5 valve better than 4 valve?

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emmac
Regular


Location:
Gippsland Lakes. Vic.
Registered:
March 2004
Re: Is 5 valve better than 4 valve? Wed, 01 June 2005 14:45 Go to previous messageGo to previous message
Intresting discussion.
On the subject of "flow interference between valves" my simple old mind would have me thinking that exactly the same thing happens with two inlet valves side by side as compared to only one valve,or a lump on a piston or the combustion chamber wall. But that even with perhaps more shaded or "interference" area's on the third valve that overall flow would still be greater even if not necessarily in proportion.I also really think you would need people with the extremely specialised expertiese & sophisticated scientific test equipment like Ricardo or MIRA to define this.I can't imagine this being a contributing factor to making a 5v-cyl. less functional than a 4v-cyl.IF IT REALLY IS.
IIRC the Cosworth History book had a piece in it by the great Keith Duckworth that wasn't very complimentary to 5v-cyl. or Yamaha's use of it.If i'd never lent the book I could tell you what he said.
I also think Yamaha's F1 5v engine from the 90's was used in a supercar they built for the road in more basic form. emmac
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SubjectPosterDate
Read Message   Is 5 valve better than 4 valve? 170bhpFri, 27 May 2005 12:54
Read Message   Re: Is 5 valve better than 4 valve? Big TFri, 27 May 2005 13:39
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasFri, 27 May 2005 14:49
Read Message   Re: Is 5 valve better than 4 valve? takaiFri, 27 May 2005 15:09
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGFri, 27 May 2005 15:34
Read Message   Re: Is 5 valve better than 4 valve? takaiSat, 28 May 2005 00:26
Read Message   Re: Is 5 valve better than 4 valve? CLGSat, 28 May 2005 01:12
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGSat, 28 May 2005 01:42
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 05:16
Read Message   Re: Is 5 valve better than 4 valve? floodyTue, 31 May 2005 13:06
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 05:33
Read Message   Re: Is 5 valve better than 4 valve? HennSat, 28 May 2005 05:41
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 05:48
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 05:46
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:05
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 06:07
Read Message   Re: Is 5 valve better than 4 valve? AcousticTue, 31 May 2005 16:03
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:10
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 06:15
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:14
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 06:17
Read Message   Re: Is 5 valve better than 4 valve? shinybluesteelSat, 28 May 2005 06:40
Read Message   Re: Is 5 valve better than 4 valve? JFAllenSat, 28 May 2005 07:28
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:39
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 06:43
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:43
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:45
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:48
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 06:58
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGSat, 28 May 2005 07:52
Read Message   Re: Is 5 valve better than 4 valve? takaiSat, 28 May 2005 08:24
Read Message   Re: Is 5 valve better than 4 valve? boredSat, 28 May 2005 10:45
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 10:08
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:12
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:14
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 11:24
Read Message   Re: Is 5 valve better than 4 valve? takaiSat, 28 May 2005 11:19
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:32
Read Message   Re: Is 5 valve better than 4 valve? boredSat, 28 May 2005 11:40
Read Message   Re: Is 5 valve better than 4 valve? takaiSat, 28 May 2005 11:43
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:48
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:49
Read Message   Re: Is 5 valve better than 4 valve? takaiSat, 28 May 2005 11:53
Read Message   Re: Is 5 valve better than 4 valve? IRA11YMon, 06 June 2005 07:26
Read Message   Re: Is 5 valve better than 4 valve? ke382TGSat, 28 May 2005 11:50
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSat, 28 May 2005 11:59
Read Message   Re: Is 5 valve better than 4 valve? ke382TGSat, 28 May 2005 12:37
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSat, 28 May 2005 13:58
Read Message   Re: Is 5 valve better than 4 valve? boudanSat, 28 May 2005 15:22
Read Message   Re: Is 5 valve better than 4 valve? AcousticTue, 31 May 2005 16:16
Read Message   Re: Is 5 valve better than 4 valve? *rivmasta*Wed, 01 June 2005 00:38
Read Message   Re: Is 5 valve better than 4 valve? off-roadSun, 05 June 2005 09:14
Read Message   Re: Is 5 valve better than 4 valve? off-roadSun, 05 June 2005 09:31
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 29 May 2005 01:29
Read Message   Re: Is 5 valve better than 4 valve? Ben WilsonTue, 31 May 2005 00:03
Read Message   Re: Is 5 valve better than 4 valve? JoshstixSun, 29 May 2005 02:26
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 29 May 2005 08:14
Read Message   Re: Is 5 valve better than 4 valve? SEXY 16Sun, 29 May 2005 09:41
Read Message   Re: Is 5 valve better than 4 valve? riverSun, 29 May 2005 11:53
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSun, 29 May 2005 12:00
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 29 May 2005 12:08
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSun, 29 May 2005 12:11
Read Message   Re: Is 5 valve better than 4 valve? Mr RevheadSun, 29 May 2005 12:34
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasSun, 29 May 2005 13:35
Read Message   Re: Is 5 valve better than 4 valve? ROLLA GTiSun, 29 May 2005 13:45
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGSun, 29 May 2005 14:15
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 29 May 2005 14:58
Read Message   Re: Is 5 valve better than 4 valve? THE WITZLMon, 30 May 2005 02:34
Read Message   Re: Is 5 valve better than 4 valve? funkdocMon, 30 May 2005 11:02
Read Message   Re: Is 5 valve better than 4 valve? 4agteMon, 06 June 2005 08:18
Read Message   Re: Is 5 valve better than 4 valve? floodyMon, 06 June 2005 09:57
Read Message   Re: Is 5 valve better than 4 valve? 4agteMon, 06 June 2005 10:10
Read Message   Re: Is 5 valve better than 4 valve? floodyTue, 07 June 2005 04:13
Read Message   Re: Is 5 valve better than 4 valve? 170bhpMon, 30 May 2005 09:14
Read Message   Re: Is 5 valve better than 4 valve? 170bhpMon, 30 May 2005 09:18
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 31 May 2005 10:36
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGMon, 30 May 2005 15:37
Read Message   Re: Is 5 valve better than 4 valve? JohnnyMon, 30 May 2005 15:55
Read Message   Re: Is 5 valve better than 4 valve? justcallmefrankTue, 31 May 2005 02:07
Read Message   Re: Is 5 valve better than 4 valve? takaiTue, 31 May 2005 00:26
Read Message   Re: Is 5 valve better than 4 valve? Ben WilsonTue, 31 May 2005 01:02
Read Message   Re: Is 5 valve better than 4 valve? takaiTue, 31 May 2005 01:04
Read Message   Re: Is 5 valve better than 4 valve? THE WITZLTue, 31 May 2005 07:41
Read Message   Re: Is 5 valve better than 4 valve? Jonny2TGTue, 31 May 2005 08:23
Read Message   Re: Is 5 valve better than 4 valve? 170bhpTue, 31 May 2005 11:40
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 31 May 2005 11:56
Read Message   Re: Is 5 valve better than 4 valve? MerudoTue, 31 May 2005 11:57
Read Message   Re: Is 5 valve better than 4 valve? xolentTue, 31 May 2005 12:17
Read Message   Re: Is 5 valve better than 4 valve? 170bhpTue, 31 May 2005 12:25
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 31 May 2005 12:43
Read Message   Re: Is 5 valve better than 4 valve? 170bhpTue, 31 May 2005 12:34
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 31 May 2005 12:57
Read Message   Re: Is 5 valve better than 4 valve? takaiTue, 31 May 2005 13:13
Read Message   Re: Is 5 valve better than 4 valve? funkdocWed, 01 June 2005 12:41
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodWed, 01 June 2005 14:04
Read Message   Re: Is 5 valve better than 4 valve?  emmacWed, 01 June 2005 14:45
Read Message   Re: Is 5 valve better than 4 valve? rx-3 ipSat, 04 June 2005 06:26
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSun, 05 June 2005 13:15
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 05 June 2005 13:47
Read Message   Re: Is 5 valve better than 4 valve? Kr0n1kSun, 05 June 2005 17:34
Read Message   Re: Is 5 valve better than 4 valve? 170bhpSun, 05 June 2005 22:28
Read Message   Re: Is 5 valve better than 4 valve? EMP-2TGSun, 05 June 2005 23:50
Read Message   Re: Is 5 valve better than 4 valve? off-roadSun, 05 June 2005 23:34
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 05 June 2005 23:40
Read Message   Re: Is 5 valve better than 4 valve? jkvsnnTue, 07 June 2005 03:19
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 07 June 2005 03:34
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodSun, 05 June 2005 23:44
Read Message   Re: Is 5 valve better than 4 valve? SEXY 16Mon, 06 June 2005 01:00
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasMon, 06 June 2005 02:01
Read Message   Re: Is 5 valve better than 4 valve? off-roadMon, 06 June 2005 02:40
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodMon, 06 June 2005 04:02
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasMon, 06 June 2005 07:04
Read Message   Re: Is 5 valve better than 4 valve? *rivmasta*Mon, 06 June 2005 07:29
Read Message   Re: Is 5 valve better than 4 valve? *rivmasta*Mon, 06 June 2005 07:32
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodMon, 06 June 2005 08:14
Read Message   Re: Is 5 valve better than 4 valve? takaiMon, 06 June 2005 09:06
Read Message   Re: Is 5 valve better than 4 valve? 4agteMon, 06 June 2005 09:11
Read Message   Re: Is 5 valve better than 4 valve? takaiMon, 06 June 2005 11:38
Read Message   Re: Is 5 valve better than 4 valve? BobskiMon, 06 June 2005 16:41
Read Message   Re: Is 5 valve better than 4 valve? Blown86Mon, 06 June 2005 23:30
Read Message   Re: Is 5 valve better than 4 valve? Corona RT142Mon, 06 June 2005 23:31
Read Message   Re: Is 5 valve better than 4 valve? adamaw11Tue, 07 June 2005 01:26
Read Message   Re: Is 5 valve better than 4 valve? Bill SherwoodTue, 07 June 2005 02:54
Read Message   Re: Is 5 valve better than 4 valve? shinybluesteelTue, 07 June 2005 03:03
Read Message   Re: Is 5 valve better than 4 valve? lumpyTue, 07 June 2005 05:52
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasFri, 10 June 2005 01:50
Read Message   Re: Is 5 valve better than 4 valve? TheStittWed, 08 June 2005 06:24
Read Message   Re: Is 5 valve better than 4 valve? 510robThu, 09 June 2005 19:48
Read Message   Re: Is 5 valve better than 4 valve? takaiFri, 10 June 2005 04:23
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasFri, 10 June 2005 04:57
Read Message   Re: Is 5 valve better than 4 valve? Mr RevheadFri, 10 June 2005 05:49
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasFri, 10 June 2005 06:21
Read Message   Re: Is 5 valve better than 4 valve? Mr RevheadFri, 10 June 2005 07:02
Read Message   Re: Is 5 valve better than 4 valve? oldcorollasFri, 10 June 2005 07:24
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