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Manny Forums Junkie Location: Sydney Registered: May 2002	Re: maximum sensible exhaust size for 1jz Thu, 05 September 2002 12:13 Originally I had a 3" dump off the cast Y-piece into 3" Flex, 3" hi-flow cat to 2 X 2.5" resonators and 2 X 2.5" mufflers with standard tips - relatively quiet. Ground clearance was pretty bad, especially in large shopping centre speed humps and driveways. Went to Brendan's twin dump pipes straight off the turbos and went 2.5"all the way incl. 2 X 2.5" flex, 2 X 2.5"hi flow cats and previous twin 2.5" resonators and mufflers/tips - it became loud as hell at idle even though the original resonators and mufflers were retained. Sweet music to my ears at full song though. Ground clearance is great now. We stuck a 2" cross pipe after the cats and this reduced the noise somewhat - plan is to drop in another cross pipe before the cat to quieten it down even more. I believe that inadequate backpressure on the 1J may be detrimental to performance. When I fitted Brendans twin 2.5" dump pipes in the backyard, I had to drive about 8 kms to my exhaust place when I had to remake/refit the exhaust - I was dumping straight to the atmosphere just below the gearbox. During the whole 8 km drive, the engine refused to make any boost - like driving with blown turbos - would not rev past 4500 rpm !! Was loud as hell too - should of seen the look on everyones face as I approached and passed by in 7.45am peak hour traffic [Report message to a moderator]

	Subject	Poster	Date
	maximum sensible exhaust size for 1jz		Wed, 04 September 2002 12:22
	Re: maximum sensible exhaust size for 1jz	FLY PSI	Wed, 04 September 2002 12:31
	Re: maximum sensible exhaust size for 1jz	Alainve	Wed, 04 September 2002 12:56
	Re: maximum sensible exhaust size for 1jz	FLY PSI	Wed, 04 September 2002 13:01
	Re: maximum sensible exhaust size for 1jz	Cool1	Wed, 04 September 2002 13:02
	Re: maximum sensible exhaust size for 1jz	Cool1	Wed, 04 September 2002 13:10
	Re: maximum sensible exhaust size for 1jz	Alainve	Wed, 04 September 2002 13:15
	Re: maximum sensible exhaust size for 1jz	Cool1	Wed, 04 September 2002 13:22
	Re: maximum sensible exhaust size for 1jz	Alainve	Wed, 04 September 2002 13:44
	Re: maximum sensible exhaust size for 1jz	Alainve	Wed, 04 September 2002 13:50
	Re: maximum sensible exhaust size for 1jz	Cool1	Wed, 04 September 2002 13:50
	Re: maximum sensible exhaust size for 1jz	FLY PSI	Wed, 04 September 2002 13:55
	Re: maximum sensible exhaust size for 1jz	Cool1	Wed, 04 September 2002 13:57
	Re: maximum sensible exhaust size for 1jz	poombah	Wed, 04 September 2002 15:18
	Re: maximum sensible exhaust size for 1jz		Wed, 04 September 2002 22:19
	Re: maximum sensible exhaust size for 1jz	Cool1	Thu, 05 September 2002 02:27
	Re: maximum sensible exhaust size for 1jz	GIN51E	Thu, 05 September 2002 02:56
	Re: maximum sensible exhaust size for 1jz		Thu, 05 September 2002 03:40
	Re: maximum sensible exhaust size for 1jz	Stefan	Fri, 06 September 2002 13:39
	Re: maximum sensible exhaust size for 1jz	draven	Thu, 05 September 2002 07:41
	Re: maximum sensible exhaust size for 1jz	GIN51E	Thu, 05 September 2002 07:46
	Re: maximum sensible exhaust size for 1jz	Nark	Thu, 05 September 2002 08:01
	Re: maximum sensible exhaust size for 1jz		Thu, 05 September 2002 08:08
	Re: maximum sensible exhaust size for 1jz	Dylo	Thu, 05 September 2002 08:47
	Re: maximum sensible exhaust size for 1jz		Thu, 05 September 2002 09:09
	Re: maximum sensible exhaust size for 1jz	mx83toy	Thu, 05 September 2002 10:09
	Re: maximum sensible exhaust size for 1jz	Bounty	Thu, 05 September 2002 10:37
	Re: maximum sensible exhaust size for 1jz	mx83toy	Thu, 05 September 2002 11:52
	Re: maximum sensible exhaust size for 1jz	Manny	Thu, 05 September 2002 12:13
	Re: maximum sensible exhaust size for 1jz	Bounty	Thu, 05 September 2002 09:02
	Re: maximum sensible exhaust size for 1jz	draven	Thu, 05 September 2002 13:33
	Re: maximum sensible exhaust size for 1jz	alakasam	Thu, 05 September 2002 15:27
	Re: maximum sensible exhaust size for 1jz	jza70-mel	Thu, 05 September 2002 16:11
	Re: maximum sensible exhaust size for 1jz	Dylo	Fri, 06 September 2002 03:37
	Re: maximum sensible exhaust size for 1jz	Bounty	Fri, 06 September 2002 09:20
	Re: maximum sensible exhaust size for 1jz	Stefan	Fri, 06 September 2002 13:47
	Re: maximum sensible exhaust size for 1jz	TE72_Turbo	Fri, 06 September 2002 09:51
	Re: maximum sensible exhaust size for 1jz	scrote	Fri, 06 September 2002 13:45
	Re: maximum sensible exhaust size for 1jz	draven	Fri, 06 September 2002 15:07
	Re: maximum sensible???????? exhaust size for 1jz	1jheavan	Sat, 07 September 2002 00:18
	Re: maximum sensible???????? exhaust size for 1jz	fj20	Sat, 07 September 2002 01:20
	Re: maximum sensible???????? exhaust size for 1jz	draven	Sat, 07 September 2002 01:33
	Re: maximum sensible???????? exhaust size for 1jz	fj20	Sun, 08 September 2002 07:03

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