CR bluetop EU

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CR bluetop EU

06-22-2006, 01:39 PM

Post: #7

firehawk Offline

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Posts: 281
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Yes, the documents from the finnish Toyota importer Korpivaara (back in the 80s) also state that the AE86 engine compression ratio is 10.0:1. At least the US models seem to use 9.4:1, on the other hand.

The primary difference seems to be the pistons - 10.0:1 models have a small dome on the middle of the piston which decreases the combustion chamber volume by about 1.6cc when compared to a completely flat piston. The 9.4:1 model, on the other hand, has a very similiarly shaped dish in the middle of the piston. It increases the combustion chamber volume by 1.6cc when compared to a flat piston, and 3.2cc when compared to the domed piston.

Note that I calculated these dome/dish volumes by assuming 39cc as the head combustion chamber volume and a 1.2mm compressed head gasket thickness.

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Messages In This Thread

CR bluetop EU - El_Camino - 06-22-2006, 10:45 AM

[] - gon - 06-22-2006, 11:48 AM

[] - Knudsen - 06-22-2006, 12:53 PM

[] - meshin - 06-22-2006, 01:21 PM

[] - Knudsen - 06-22-2006, 01:25 PM

[] - El_Camino - 06-22-2006, 01:25 PM

[] - firehawk - 06-22-2006 01:39 PM

[] - S.K. - 06-22-2006, 02:32 PM

[] - Knudsen - 06-22-2006, 05:13 PM

[] - El_Camino - 06-23-2006, 08:32 AM

[] - meshin - 06-23-2006, 02:03 PM

[] - El_Camino - 06-23-2006, 02:37 PM

[] - jamiemirror - 06-23-2006, 02:38 PM

[] - punkara - 06-23-2006, 05:47 PM

[] - El_Camino - 06-23-2006, 06:41 PM

[] - meshin - 06-23-2006, 08:13 PM

[] - El_Camino - 06-23-2006, 08:32 PM

[] - meshin - 06-23-2006, 08:37 PM

[] - El_Camino - 06-23-2006, 08:47 PM

[] - meshin - 06-23-2006, 09:03 PM

[] - firehawk - 06-23-2006, 10:50 PM

[] - punkara - 06-23-2006, 11:11 PM

[] - punkara - 06-23-2006, 11:31 PM

[] - El_Camino - 06-24-2006, 12:57 PM

[] - meshin - 06-24-2006, 01:29 PM

[] - El_Camino - 06-24-2006, 02:02 PM

[] - punkara - 06-24-2006, 07:35 PM

[] - punkara - 06-24-2006, 08:54 PM

[] - Bad_Dog - 06-26-2006, 09:11 AM

[] - dreja - 06-26-2006, 12:58 PM

[] - dreja - 06-26-2006, 01:13 PM

[] - jamiemirror - 06-26-2006, 01:16 PM

[] - dreja - 06-26-2006, 01:31 PM

[] - meshin - 06-26-2006, 01:35 PM

[] - jamiemirror - 06-26-2006, 03:45 PM

[] - Ryo - 06-27-2006, 09:39 AM

[] - jamiemirror - 06-27-2006, 01:08 PM

[] - Ryo - 06-28-2006, 11:52 AM

[] - dreja - 06-28-2006, 12:07 PM

[] - Ryo - 06-29-2006, 01:17 PM

[] - dreja - 06-30-2006, 07:19 AM

[] - Bean - 11-03-2006, 06:46 PM

[] - Ivan141 - 11-04-2006, 12:49 PM

[] - Dr.Ling - 11-16-2008, 06:37 PM

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Poll: The compression ratio of the EU bluetop w/o cat:
	10 :1
	9,4 :1