Toymods Car Club Inc: Tech & Conversions => Is 5 valve better than 4 valve?

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Jonny2TG
Forums Junkie

Location:
Tasmania
Registered:
May 2002

Re: Is 5 valve better than 4 valve?	Fri, 27 May 2005 15:34

I think the idear of Formula Atlantic, was to choose a engine that was based on a common production road car engine that was of compact, sporty and simple design. It would hardly matter what engine they chose as all teams would have to use the exact same one. I am guessing that when the 4A-G was first chosen for Formula Atlantic the 20 valve wasn't out yet, or it was very new with not alot of resurch and aftermarket bits avaliable yet. It would have been the decision of TRD-USA I guess, and they went with what they were familiar with. (20 valve not avaliable in USA). If they relaxed the rules, I'm sure some would try the 20 valve. But I don't really know... F1 rules are very tight. I'm not even sure if they would allow a 5 valve head. It makes sence to me that the 5 valve design would be a bit better. But only a small difference, and usually the difference in power due to the tuner and other parts selected is a bigger factor. I have heard the 20 valve 4AG have a more progressive torque curve, and the 16 valve (modifyed) is more peaky. This maybe why 20valves feel slow, maybe they have more power in midrange so never give that sudden power band. ?? How many people here actualy have a 210hp 4AG anyway? I would like to get my engine up to around 200hp. I am thinking of using a fairly stock 4AG 20 valve, with 304 degree camshafts. Will that do it? I know valve timing would need to be looked at, but the basic package would be there right? [Report message to a moderator]

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Subject Poster Date

Read Message Is 5 valve better than 4 valve? 170bhp Fri, 27 May 2005 12:54
Re: Is 5 valve better than 4 valve? Big T Fri, 27 May 2005 13:39
Re: Is 5 valve better than 4 valve? oldcorollas Fri, 27 May 2005 14:49
Re: Is 5 valve better than 4 valve? takai Fri, 27 May 2005 15:09
Read Message Re: Is 5 valve better than 4 valve? Jonny2TG Fri, 27 May 2005 15:34
Re: Is 5 valve better than 4 valve? takai Sat, 28 May 2005 00:26
Re: Is 5 valve better than 4 valve? CLG Sat, 28 May 2005 01:12
Re: Is 5 valve better than 4 valve? Jonny2TG Sat, 28 May 2005 01:42
Read Message Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 05:16
Re: Is 5 valve better than 4 valve? floody Tue, 31 May 2005 13:06
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 05:33
Re: Is 5 valve better than 4 valve? Henn Sat, 28 May 2005 05:41
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 05:48
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 05:46
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:05
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 06:07
Read Message Re: Is 5 valve better than 4 valve? Acoustic Tue, 31 May 2005 16:03
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:10
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 06:15
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:14
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 06:17
Re: Is 5 valve better than 4 valve? shinybluesteel Sat, 28 May 2005 06:40
Re: Is 5 valve better than 4 valve? JFAllen Sat, 28 May 2005 07:28
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:39
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 06:43
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:43
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:45
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:48
Read Message Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 06:58
Re: Is 5 valve better than 4 valve? Jonny2TG Sat, 28 May 2005 07:52
Re: Is 5 valve better than 4 valve? takai Sat, 28 May 2005 08:24
Re: Is 5 valve better than 4 valve? bored Sat, 28 May 2005 10:45
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 10:08
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:12
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:14
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 11:24
Read Message Re: Is 5 valve better than 4 valve? takai Sat, 28 May 2005 11:19
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:32
Re: Is 5 valve better than 4 valve? bored Sat, 28 May 2005 11:40
Re: Is 5 valve better than 4 valve? takai Sat, 28 May 2005 11:43
Read Message Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:48
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:49
Re: Is 5 valve better than 4 valve? takai Sat, 28 May 2005 11:53
Re: Is 5 valve better than 4 valve? IRA11Y Mon, 06 June 2005 07:26
Read Message Re: Is 5 valve better than 4 valve? ke382TG Sat, 28 May 2005 11:50
Re: Is 5 valve better than 4 valve? 170bhp Sat, 28 May 2005 11:59
Re: Is 5 valve better than 4 valve? ke382TG Sat, 28 May 2005 12:37
Re: Is 5 valve better than 4 valve? Bill Sherwood Sat, 28 May 2005 13:58
Read Message Re: Is 5 valve better than 4 valve? boudan Sat, 28 May 2005 15:22
Re: Is 5 valve better than 4 valve? Acoustic Tue, 31 May 2005 16:16
Re: Is 5 valve better than 4 valve? *rivmasta* Wed, 01 June 2005 00:38
Re: Is 5 valve better than 4 valve? off-road Sun, 05 June 2005 09:14
Read Message Re: Is 5 valve better than 4 valve? off-road Sun, 05 June 2005 09:31
Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 29 May 2005 01:29
Re: Is 5 valve better than 4 valve? Ben Wilson Tue, 31 May 2005 00:03
Re: Is 5 valve better than 4 valve? Joshstix Sun, 29 May 2005 02:26
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 29 May 2005 08:14
Re: Is 5 valve better than 4 valve? SEXY 16 Sun, 29 May 2005 09:41
Re: Is 5 valve better than 4 valve? river Sun, 29 May 2005 11:53
Re: Is 5 valve better than 4 valve? 170bhp Sun, 29 May 2005 12:00
Read Message Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 29 May 2005 12:08
Re: Is 5 valve better than 4 valve? 170bhp Sun, 29 May 2005 12:11
Re: Is 5 valve better than 4 valve? Mr Revhead Sun, 29 May 2005 12:34
Re: Is 5 valve better than 4 valve? oldcorollas Sun, 29 May 2005 13:35
Read Message Re: Is 5 valve better than 4 valve? ROLLA GTi Sun, 29 May 2005 13:45
Re: Is 5 valve better than 4 valve? Jonny2TG Sun, 29 May 2005 14:15
Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 29 May 2005 14:58
Re: Is 5 valve better than 4 valve? THE WITZL Mon, 30 May 2005 02:34
Read Message Re: Is 5 valve better than 4 valve? funkdoc Mon, 30 May 2005 11:02
Re: Is 5 valve better than 4 valve? 4agte Mon, 06 June 2005 08:18
Re: Is 5 valve better than 4 valve? floody Mon, 06 June 2005 09:57
Re: Is 5 valve better than 4 valve? 4agte Mon, 06 June 2005 10:10
Read Message Re: Is 5 valve better than 4 valve? floody Tue, 07 June 2005 04:13
Re: Is 5 valve better than 4 valve? 170bhp Mon, 30 May 2005 09:14
Re: Is 5 valve better than 4 valve? 170bhp Mon, 30 May 2005 09:18
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 31 May 2005 10:36
Read Message Re: Is 5 valve better than 4 valve? Jonny2TG Mon, 30 May 2005 15:37
Re: Is 5 valve better than 4 valve? Johnny Mon, 30 May 2005 15:55
Re: Is 5 valve better than 4 valve? justcallmefrank Tue, 31 May 2005 02:07
Re: Is 5 valve better than 4 valve? takai Tue, 31 May 2005 00:26
Read Message Re: Is 5 valve better than 4 valve? Ben Wilson Tue, 31 May 2005 01:02
Re: Is 5 valve better than 4 valve? takai Tue, 31 May 2005 01:04
Re: Is 5 valve better than 4 valve? THE WITZL Tue, 31 May 2005 07:41
Re: Is 5 valve better than 4 valve? Jonny2TG Tue, 31 May 2005 08:23
Read Message Re: Is 5 valve better than 4 valve? 170bhp Tue, 31 May 2005 11:40
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 31 May 2005 11:56
Re: Is 5 valve better than 4 valve? Merudo Tue, 31 May 2005 11:57
Re: Is 5 valve better than 4 valve? xolent Tue, 31 May 2005 12:17
Read Message Re: Is 5 valve better than 4 valve? 170bhp Tue, 31 May 2005 12:25
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 31 May 2005 12:43
Re: Is 5 valve better than 4 valve? 170bhp Tue, 31 May 2005 12:34
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 31 May 2005 12:57
Read Message Re: Is 5 valve better than 4 valve? takai Tue, 31 May 2005 13:13
Re: Is 5 valve better than 4 valve? funkdoc Wed, 01 June 2005 12:41
Re: Is 5 valve better than 4 valve? Bill Sherwood Wed, 01 June 2005 14:04
Re: Is 5 valve better than 4 valve? emmac Wed, 01 June 2005 14:45
Read Message Re: Is 5 valve better than 4 valve? rx-3 ip Sat, 04 June 2005 06:26
Re: Is 5 valve better than 4 valve? 170bhp Sun, 05 June 2005 13:15
Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 05 June 2005 13:47
Re: Is 5 valve better than 4 valve? Kr0n1k Sun, 05 June 2005 17:34
Read Message Re: Is 5 valve better than 4 valve? 170bhp Sun, 05 June 2005 22:28
Re: Is 5 valve better than 4 valve? EMP-2TG Sun, 05 June 2005 23:50
Re: Is 5 valve better than 4 valve? off-road Sun, 05 June 2005 23:34
Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 05 June 2005 23:40
Read Message Re: Is 5 valve better than 4 valve? jkvsnn Tue, 07 June 2005 03:19
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 07 June 2005 03:34
Re: Is 5 valve better than 4 valve? Bill Sherwood Sun, 05 June 2005 23:44
Re: Is 5 valve better than 4 valve? SEXY 16 Mon, 06 June 2005 01:00
Read Message Re: Is 5 valve better than 4 valve? oldcorollas Mon, 06 June 2005 02:01
Re: Is 5 valve better than 4 valve? off-road Mon, 06 June 2005 02:40
Re: Is 5 valve better than 4 valve? Bill Sherwood Mon, 06 June 2005 04:02
Re: Is 5 valve better than 4 valve? oldcorollas Mon, 06 June 2005 07:04
Read Message Re: Is 5 valve better than 4 valve? *rivmasta* Mon, 06 June 2005 07:29
Re: Is 5 valve better than 4 valve? *rivmasta* Mon, 06 June 2005 07:32
Re: Is 5 valve better than 4 valve? Bill Sherwood Mon, 06 June 2005 08:14
Re: Is 5 valve better than 4 valve? takai Mon, 06 June 2005 09:06
Read Message Re: Is 5 valve better than 4 valve? 4agte Mon, 06 June 2005 09:11
Re: Is 5 valve better than 4 valve? takai Mon, 06 June 2005 11:38
Re: Is 5 valve better than 4 valve? Bobski Mon, 06 June 2005 16:41
Re: Is 5 valve better than 4 valve? Blown86 Mon, 06 June 2005 23:30
Read Message Re: Is 5 valve better than 4 valve? Corona RT142 Mon, 06 June 2005 23:31
Re: Is 5 valve better than 4 valve? adamaw11 Tue, 07 June 2005 01:26
Re: Is 5 valve better than 4 valve? Bill Sherwood Tue, 07 June 2005 02:54
Re: Is 5 valve better than 4 valve? shinybluesteel Tue, 07 June 2005 03:03
Read Message Re: Is 5 valve better than 4 valve? lumpy Tue, 07 June 2005 05:52
Re: Is 5 valve better than 4 valve? oldcorollas Fri, 10 June 2005 01:50
Re: Is 5 valve better than 4 valve? TheStitt Wed, 08 June 2005 06:24
Re: Is 5 valve better than 4 valve? 510rob Thu, 09 June 2005 19:48
Read Message Re: Is 5 valve better than 4 valve? takai Fri, 10 June 2005 04:23
Re: Is 5 valve better than 4 valve? oldcorollas Fri, 10 June 2005 04:57
Re: Is 5 valve better than 4 valve? Mr Revhead Fri, 10 June 2005 05:49
Re: Is 5 valve better than 4 valve? oldcorollas Fri, 10 June 2005 06:21
Read Message Re: Is 5 valve better than 4 valve? Mr Revhead Fri, 10 June 2005 07:02
Re: Is 5 valve better than 4 valve? oldcorollas Fri, 10 June 2005 07:24

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