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trond trond is offline
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Join Date: May 2008
Location: Stavanger, Norway
Posts: 595
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10.5CR twin spark 3.2SS pinging with 95RON

my 4000 miles old 3.2SS conversion has 10.5:1CR CP 98 mm pistons, twin spark EDIS ignition run by MS2 and stock SC cams. On 95RON (=91 US octane R+M/2) fuel I have pinging under load, that only goes away if I run as little as 10 degrees@3500 WOT ignition advance or back off on the throttle. Also pinging goes away with 98RON fuel but unfortunately this is getting increasingly difficult to find.

I would have thought this configuration should have been able to run 95RON/91 US ? What do you think
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80SC (ex California) 3.2SS
Old 08-20-2018, 11:27 PM
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