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Any reason to think 9.8:1 pistons would cause grief
I'm currently researching the future engine rebuild and have been reading up a bunch of threads regarding twin plugging & compression ratios. The twin plug route seems to add a significant expense (anyone who's done this - I'd love to know what it came to in Aus) so I'm thinking of sticking with a set of 95mm 9.8:1 mahle pistons & avoiding twin plug issues. The magic number in the US seems to be 10:1 before twin plugging is a requirement. I'm wondering if 9.8:1 is ok on our 98 octane. If not, 9.3:1 will be used instead.
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'77 Carrera 3.0
04 Subaru Outback (surfboards don't fit in 911's)
"Stay happy and you'll be perfectly fine." - Jack Norris
Last edited by gavinlit; 01-12-2006 at 12:45 PM..
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