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Steve M Forums Junkie Location: Adelaide Registered: June 2003	Re: high compression VS rev-ability of Hi-Po 18RG Tue, 19 August 2003 05:16 If you go for high compression you'll most likely want some pretty serious cams as this would reduce your chances of serious detonation problems with high compression pistons and low duration cams. Toyota ran 11.5:1 pistons in their 18rgs and also 10.5:1, but they were getting max power about 7500 - 9000 RPM, which is where the cams appropriate for these types of compression figures would be putting you. Unless you are willing to hugely raise you're redline, I wouldn't go too high for your compression or low cam overlap will cause problems. Summary:] high comp + big cam = great power but @ high revs. High revs = less longevity of engine (it'll die sooner) high comp + small cam = good power but dead pistons (detonation)and headgaskets. If there is anything else you'd like to ask on this topic I would be happy to try to answer your questions. [Report message to a moderator]

	Subject	Poster	Date
	high compression VS rev-ability of Hi-Po 18RG	Mr DOHC	Mon, 18 August 2003 07:05
	Re: high compression VS rev-ability of Hi-Po 18RG	oldcorollas	Mon, 18 August 2003 08:44
	Re: high compression VS rev-ability of Hi-Po 18RG	clubagreenie	Mon, 18 August 2003 11:01
	Re: high compression VS rev-ability of Hi-Po 18RG	clubagreenie	Mon, 18 August 2003 11:03
	Re: high compression VS rev-ability of Hi-Po 18RG	earlyrolla	Mon, 18 August 2003 16:33
	Re: high compression VS rev-ability of Hi-Po 18RG	Mr DOHC	Tue, 19 August 2003 00:58
	Re: high compression VS rev-ability of Hi-Po 18RG	Steve M	Tue, 19 August 2003 05:08
	Re: high compression VS rev-ability of Hi-Po 18RG	Steve M	Tue, 19 August 2003 05:16
	Re: high compression VS rev-ability of Hi-Po 18RG	Mr DOHC	Wed, 20 August 2003 00:22
	Re: high compression VS rev-ability of Hi-Po 18RG	earlyrolla	Wed, 20 August 2003 05:59
	Re: high compression VS rev-ability of Hi-Po 18RG	CelicaRA45	Wed, 20 August 2003 07:14
	Re: high compression VS rev-ability of Hi-Po 18RG	xxaccoxx	Wed, 20 August 2003 12:32
	Re: high compression VS rev-ability of Hi-Po 18RG	Alchemist	Thu, 21 August 2003 03:37
	Re: high compression VS rev-ability of Hi-Po 18RG	Mr DOHC	Thu, 21 August 2003 07:26
	Re: high compression VS rev-ability of Hi-Po 18RG	Norbie	Thu, 21 August 2003 08:58
	Re: high compression VS rev-ability of Hi-Po 18RG	blackRA28	Thu, 21 August 2003 13:37
	Re: high compression VS rev-ability of Hi-Po 18RG	benen	Thu, 21 August 2003 14:16
	Re: high compression VS rev-ability of Hi-Po 18RG	Norbie	Thu, 21 August 2003 22:56
	Re: high compression VS rev-ability of Hi-Po 18RG	benen	Fri, 22 August 2003 03:15
	Re: high compression VS rev-ability of Hi-Po 18RG	Norbie	Fri, 22 August 2003 03:43

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