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More eggs don't make a better cake - more fuel doesn't make better power either! - I have found all my Saab 900's have run better in terms of power and economy when they are sightly rich - I have also heard that the 14.7:1 ratio is the best for the long life of the cat but not the best for power and economy - hence my experience with richer mixtures and Alex's 12.5:1 figure. It's a fine balance though as if I turn up my fuel pressure by 0.1 bar I can feel the engine hesitate on pickup and feel boggy - too much fuel.
posted by 195.40.138...
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