Engine Bogs Down
03-02-2007, 03:30 PM
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Engine Bogs Down I installed a higher duration/lift cam, so the g/cyl air mass has increased vs. rpm in the main spark table. I think this is causing the timing tables to be incorrect when throttle position is greater than 50%, because the engine bogs down.
I added 3 degrees timing to the entire stock table, but it does not help. When I add timing to individual cells that the stock table obviously cannot support now, there is some improvement but not much.
When I remove timing for cells showing knock retard, the knock retard sometimes increases! Anybody have any idea what is going on?
I added 3 degrees timing to the entire stock table, but it does not help. When I add timing to individual cells that the stock table obviously cannot support now, there is some improvement but not much.
When I remove timing for cells showing knock retard, the knock retard sometimes increases! Anybody have any idea what is going on?
03-02-2007, 10:59 PM
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What kind of cam? Usually, you need to take a little timing out of the stock table below 1600rpms and need to add in 2~3* above 1600rpms. But, you shouldn't be playing with it too much until you get a chance to dial in your fueling or at least get it close.