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Join Date: May 2003
Posts: 132
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Leakdown test - Hot vs cold
I performed a leakdown and compression test on my 87 930, 7.5 to 1 RUF 3.4L pistons and cylinders, stock cams. For numerous reasons the engine was stone cold.
Compression: 1 - 153, 2 - 154, 3 - 154, 4 - 151, 5 - 154, 6 - 153. Leakdown: 1, 2, 5, and 6 - 6%. 3 and 4 - 5.5%. I like the numbers as far as consistency  , but would anyone like to guess what the numbers would be on a hot engine?
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Victor Toce 2000 Boxster S w/ Tequipment exhaust 1993 Spec Miata 87 911 turbo - sold 3.4 RUF pistons and cylinders Euro CIS head |
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05-18-2005, 07:44 PM
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Join Date: Apr 2005
Location: Co. Carlow, Ireland
Posts: 455
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I'm guessing they were worse due to heat expansion or something. What were they?
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Charles '84 911 3.2 |
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05-20-2005, 03:27 AM
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Join Date: Feb 2003
Location: So California
Posts: 3,787
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should be the same or slightly better. Those are very good numbers.
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05-20-2005, 07:29 PM
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Location: Co. Carlow, Ireland
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But then why did he have a disgruntled looking smilie?
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Charles '84 911 3.2 |
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05-21-2005, 03:44 AM
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Posts: 132
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I have not done the hot numbers yet. I was thinking they would be better.
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Victor Toce 2000 Boxster S w/ Tequipment exhaust 1993 Spec Miata 87 911 turbo - sold 3.4 RUF pistons and cylinders Euro CIS head |
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05-22-2005, 05:45 AM
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