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Early 930 CO% settings?
Does anyone know the proper CO% setting for a early 3.0 Turbo?
My 77 930 is at around 4.25% CO with 80HC and CO2 is 6.2.
The PO had a 1 bar spring put in with SSIs and dual exhaust, the last time the car was worked on over a year ago the tech put it rich to help detonation probably at high rpm but the car is very slow off idle and is bogged down till above 2300rpms, mini-vans ride my tail til then.
I am thinking the rich CO setting is causing this but I don't want to grenade my motor by setting it too lean either, I was thinking more around 2% CO.
At around 2000rpm the CO% is at 4% as well.
Any ideas appreciated.
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